OpenTTD-patches/config.lib

# $Id$

# This file is part of OpenTTD.
# OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
# OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.

log() {
	if [ $1 = "1" ]; then
		shift
		echo "$@"
	else
		shift
	fi
	echo "$@" >> $config_log
}

set_default() {
	ignore_extra_parameters="0"
	# We set all kinds of defaults for params. Later on the user can override
	# most of them; but if they don't, this default is used.
	build=""
	host=""
	cc_build=""
	cc_host=""
	cxx_build=""
	cxx_host=""
	windres=""
	strip=""
	lipo=""
	awk="awk"
	pkg_config="pkg-config"
	os="DETECT"
	cpu_type="DETECT"
	config_log="config.log"
	prefix_dir="/usr/local"
	binary_dir="games"
	data_dir="share/games/openttd"
	doc_dir="1"
	icon_dir="share/pixmaps"
	icon_theme_dir="1"
	personal_dir="1"
	shared_dir="1"
	install_dir="/"
	man_dir="1"
	menu_dir="1"
	menu_group="Game;"
	menu_name="OpenTTD"
	binary_name="openttd"
	enable_debug="0"
	enable_desync_debug="0"
	enable_profiling="0"
	enable_lto="0"
	enable_dedicated="0"
	enable_static="1"
	enable_translator="0"
	enable_unicode="1"
	enable_console="1";
	enable_assert="1"
	enable_strip="0"
	enable_universal="0"
	enable_osx_g5="0"
	enable_cocoa_quartz="1"
	enable_cocoa_quickdraw="1"
	with_osx_sysroot="1"
	with_application_bundle="1"
	with_menu_entry="1"
	with_allegro="1"
	with_sdl="1"
	with_cocoa="1"
	with_zlib="1"
	with_lzma="1"
	with_lzo2="1"
	with_xdg_basedir="1"
	with_fcitx="1"
	with_png="1"
	enable_builtin_depend="1"
	with_makedepend="0"
	with_direct_music="1"
	with_xaudio2="1"
	with_sort="1"
	with_iconv="1"
	with_midi=""
	with_midi_arg=""
	with_fluidsynth="1"
	with_freetype="1"
	with_fontconfig="1"
	with_icu_layout="1"
	with_icu_sort="1"
	static_icu="0"
	with_uniscribe="1"
	with_threads="1"
	with_distcc="1"
	with_ccache="1"
	with_nforenum="1"
	with_grfcodec="1"
	with_sse="1"
	with_libbfd="1"
	with_bfd_extra_debug="1"
	with_self_gdb_debug="1"
	with_self_lldb_debug="1"
	with_sigaltstack="1"

	save_params_array="
		build
		host
		cc_build
		cc_host
		cxx_build
		cxx_host
		windres
		strip
		lipo
		awk
		pkg_config
		os
		cpu_type
		config_log
		prefix_dir
		binary_dir
		data_dir
		doc_dir
		icon_dir
		icon_theme_dir
		man_dir
		menu_dir
		personal_dir
		shared_dir
		install_dir
		menu_group
		menu_name
		binary_name
		enable_debug
		enable_desync_debug
		enable_profiling
		enable_lto
		enable_dedicated
		enable_static
		enable_translator
		enable_unicode
		enable_console
		enable_assert
		enable_strip
		enable_universal
		enable_osx_g5
		enable_cocoa_quartz
		enable_cocoa_quickdraw
		with_osx_sysroot
		with_application_bundle
		with_allegro
		with_sdl
		with_cocoa
		with_zlib
		with_lzma
		with_lzo2
		with_xdg_basedir
		with_fcitx
		with_png
		enable_builtin_depend
		with_makedepend
		with_direct_music
		with_xaudio2
		with_sort
		with_iconv
		with_midi
		with_midi_arg
		with_fluidsynth
		with_freetype
		with_fontconfig
		with_icu_layout
		with_icu_sort
		static_icu
		with_uniscribe
		with_threads
		with_distcc
		with_ccache
		with_grfcodec
		with_nforenum
		with_sse
		with_libbfd
		with_bfd_extra_debug
		with_self_gdb_debug
		with_self_lldb_debug
		with_sigaltstack
	CC CXX CFLAGS CXXFLAGS LDFLAGS CFLAGS_BUILD CXXFLAGS_BUILD LDFLAGS_BUILD PKG_CONFIG_PATH PKG_CONFIG_LIBDIR"
}

detect_params() {
	# Walk over all params from the user and override any default settings if
	#  needed. This also handles any invalid option.
	for p in "$@"; do
		if [ -n "$prev_p" ]; then
			eval "$prev_p=\$p"
			prev_p=
			continue
		fi

		optarg=`expr "x$p" : 'x[^=]*=\(.*\)'`

		case "$p" in
			--help | -h | -\?)            showhelp; exit 0;;

			--config-log)                 prev_p="config_log";;
			--config-log=*)               config_log="$optarg";;

			--build)                      prev_p="build";;
			--build=*)                    build="$optarg";;

			--host)                       prev_p="host";;
			--host=*)                     host="$optarg";;

			--os)                         prev_p="os";;
			--os=*)                       os="$optarg";;

			--cpu-type)                   prev_p="cpu_type";;
			--cpu-type=*)                 cpu_type="$optarg";;

			--cc-build)                   prev_p="cc_build";;
			--cc-build=*)                 cc_build="$optarg";;
			--cc-host)                    prev_p="cc_host";;
			--cc-host=*)                  cc_host="$optarg";;
			--cxx-build)                  prev_p="cxx_build";;
			--cxx-build=*)                cxx_build="$optarg";;
			--cxx-host)                   prev_p="cxx_host";;
			--cxx-host=*)                 cxx_host="$optarg";;
			--windres)                    prev_p="windres";;
			--windres=*)                  windres="$optarg";;
			--awk)                        prev_p="awk";;
			--awk=*)                      awk="$optarg";;
			--pkg-config)                 prev_p="pkg_config";;
			--pkg-config=*)               pkg_config="$optarg";;
			--strip)                      prev_p="strip";;
			--strip=*)                    strip="$optarg";;
			--lipo)                       prev_p="lipo";;
			--lipo=*)                     lipo="$optarg";;



			# Alias --prefix with --prefix-dir, for compatibility with GNU autotools
			--prefix-dir | --prefix)      prev_p="prefix_dir";;
			--prefix-dir=* | --prefix=*)  prefix_dir="$optarg";;

			--binary-dir)                 prev_p="binary_dir";;
			--binary-dir=*)               binary_dir="$optarg";;

			--data-dir)                   prev_p="data_dir";;
			--data-dir=*)                 data_dir="$optarg";;

			--doc-dir)                    prev_p="doc_dir";;
			--doc-dir=*)                  doc_dir="$optarg";;

			--icon-dir)                   prev_p="icon_dir";;
			--icon-dir=*)                 icon_dir="$optarg";;

			--icon-theme-dir)             prev_p="icon_theme_dir";;
			--icon-theme-dir=*)           icon_theme_dir="$optarg";;
			--without-icon-theme)         icon_theme_dir="";;

			--menu-dir)                   prev_p="menu_dir";;
			--menu-dir=*)                 menu_dir="$optarg";;
			--without-menu-entry)         menu_dir="";;

			--menu-name)                  prev_p="menu_name";;
			--menu-name=*)                menu_name="$optarg";;

			--binary-name)                prev_p="binary_name";;
			--binary-name=*)              binary_name="$optarg";;

			--man-dir)                    prev_p="man_dir";;
			--man-dir=*)                  man_dir="$optarg";;

			--personal-dir)               prev_p="personal_dir";;
			--personal-dir=*)             personal_dir="$optarg";;
			--without-personal-dir)       personal_dir="";;

			--shared-dir)                 prev_p="shared_dir";;
			--shared-dir=*)               shared_dir="$optarg";;
			--without-shared-dir)         shared_dir="";;

			--install-dir)                prev_p="install_dir";;
			--install-dir=*)              install_dir="$optarg";;



			--menu-group)                 prev_p="menu_group";;
			--menu-group=*)               menu_group="$optarg";;



			--enable-debug)               enable_debug="1";;
			--enable-debug=*)             enable_debug="$optarg";;
			--enable-desync-debug)        enable_desync_debug="1";;
			--enable-desync-debug=*)      enable_desync_debug="$optarg";;
			--enable-profiling)           enable_profiling="1";;
			--enable-profiling=*)         enable_profiling="$optarg";;
			--enable-lto)                 enable_lto="1";;
			--enable-lto=*)               enable_lto="$optarg";;
			--enable-ipo)                 enable_lto="1";;
			--enable-ipo=*)               enable_lto="$optarg";;
			--enable-dedicated)           enable_dedicated="1";;
			--enable-dedicated=*)         enable_dedicated="$optarg";;
			--disable-static)             enable_static="0";;
			--enable-static)              enable_static="2";;
			--enable-static=*)            enable_static="$optarg";;
			--disable-translator)         enable_translator="0";;
			--enable-translator)          enable_translator="2";;
			--enable-translator=*)        enable_translator="$optarg";;
			--disable-assert)             enable_assert="0";;
			--enable-assert)              enable_assert="2";;
			--enable-assert=*)            enable_assert="$optarg";;
			--disable-strip)              enable_strip="0";;
			--enable-strip)               enable_strip="2";;
			--enable-strip=*)             enable_strip="$optarg";;
			--disable-universal)          enable_universal="0";;
			--enable-universal)           enable_universal="i386 ppc";;
			--enable-universal=*)         enable_universal="$optarg";;
			--disable-osx-g5)             enable_osx_g5="0";;
			--enable-osx-g5)              enable_osx_g5="2";;
			--enable-osx-g5=*)            enable_osx_g5="$optarg";;
			--disable-unicode)            enable_unicode="0";;
			--enable-unicode)             enable_unicode="2";;
			--enable-unicode=*)           enable_unicode="$optarg";;
			--disable-console)            enable_console="0";;
			--enable-console)             enable_console="2";;
			--enable-console=*)           enable_console="$optarg";;

			--disable-cocoa-quartz)       enable_cocoa_quartz="0";;
			--enable-cocoa-quartz)        enable_cocoa_quartz="2";;
			--enable-cocoa-quartz=*)      enable_cocoa_quartz="$optarg";;
			--disable-cocoa-quickdraw)    enable_cocoa_quickdraw="0";;
			--enable-cocoa-quickdraw)     enable_cocoa_quickdraw="2";;
			--enable-cocoa-quickdraw=*)   enable_cocoa_quickdraw="$optarg";;

			--with-allegro)               with_allegro="2";;
			--without-allegro)            with_allegro="0";;
			--with-allegro=*)             with_allegro="$optarg";;

			--with-sdl)                   with_sdl="2";;
			--without-sdl)                with_sdl="0";;
			--with-sdl=*)                 with_sdl="$optarg";;

			--with-cocoa)                 with_cocoa="2";;
			--without-cocoa)              with_cocoa="0";;
			--with-cocoa=*)               with_cocoa="$optarg";;

			--with-zlib)                  with_zlib="2";;
			--without-zlib)               with_zlib="0";;
			--with-zlib=*)                with_zlib="$optarg";;

			--with-lzma)                  with_lzma="2";;
			--without-lzma)               with_lzma="0";;
			--with-lzma=*)                with_lzma="$optarg";;
			--with-liblzma)               with_lzma="2";;
			--without-liblzma)            with_lzma="0";;
			--with-liblzma=*)             with_lzma="$optarg";;

			--with-lzo2)                  with_lzo2="2";;
			--without-lzo2)               with_lzo2="0";;
			--with-lzo2=*)                with_lzo2="$optarg";;
			--with-liblzo2)               with_lzo2="2";;
			--without-liblzo2)            with_lzo2="0";;
			--with-liblzo2=*)             with_lzo2="$optarg";;

			--with-xdg-basedir)           with_xdg_basedir="2";;
			--without-xdg-basedir)        with_xdg_basedir="0";;
			--with-xdg-basedir=*)         with_xdg_basedir="$optarg";;
			--with-libxdg-basedir)        with_xdg_basedir="2";;
			--without-libxdg-basedir)     with_xdg_basedir="0";;
			--with-libxdg-basedir=*)      with_xdg_basedir="$optarg";;

			--with-fcitx)                 with_fcitx="2";;
			--without-fcitx)              with_fcitx="0";;
			--with-fcitx=*)               with_fcitx="$optarg";;

			--with-png)                   with_png="2";;
			--without-png)                with_png="0";;
			--with-png=*)                 with_png="$optarg";;
			--with-libpng)                with_png="2";;
			--without-libpng)             with_png="0";;
			--with-libpng=*)              with_png="$optarg";;

			--with-fluidsynth)            with_fluidsynth="2";;
			--without-fluidsynth)         with_fluidsynth="0";;
			--with-fluidsynth=*)          with_fluidsynth="$optarg";;

			--with-freetype)              with_freetype="2";;
			--without-freetype)           with_freetype="0";;
			--with-freetype=*)            with_freetype="$optarg";;
			--with-libfreetype)           with_freetype="2";;
			--without-libfreetype)        with_freetype="0";;
			--with-libfreetype=*)         with_freetype="$optarg";;

			--with-fontconfig)            with_fontconfig="2";;
			--without-fontconfig)         with_fontconfig="0";;
			--with-fontconfig=*)          with_fontconfig="$optarg";;
			--with-libfontconfig)         with_fontconfig="2";;
			--without-libfontconfig)      with_fontconfig="0";;
			--with-libfontconfig=*)       with_fontconfig="$optarg";;

			--with-icu)                   with_icu_layout="2";with_icu_sort="2";;
			--without-icu)                with_icu_layout="0";with_icu_sort="0";;
			--with-icu=*)                 with_icu_layout="$optarg";with_icu_sort="$optarg";;
			--with-libicu)                with_icu_layout="2";with_icu_sort="2";;
			--without-libicu)             with_icu_layout="0";with_icu_sort="0";;
			--with-libicu=*)              with_icu_layout="$optarg";with_icu_sort="$optarg";;
			--with-icu-layout)            with_icu_layout="2";;
			--without-icu-layout)         with_icu_layout="0";;
			--with-icu-layout=*)          with_icu_layout="$optarg";;
			--with-icu-sort)              with_icu_sort="2";;
			--without-icu-sort)           with_icu_sort="0";;
			--with-icu-sort=*)            with_icu_sort="$optarg";;
			--static-icu)                 static_icu="1";;
			--static-icu=*)               static_icu="$optarg";;
			--static-libicu)              static_icu="1";;
			--static-libicu=*)            static_icu="$optarg";;

			--with-uniscribe)             with_uniscribe="2";;
			--without-uniscribe)          with_uniscribe="0";;
			--with-uniscribe=*)           with_uniscribe="$optarg";;

			--disable-builtin-depend)     enable_builtin_depend="0";;
			--enable-builtin-depend)      enable_builtin_depend="2";;
			--enable-builtin-depend=*)    enable_builtin_depend="$optarg";;

			--with-makedepend)            with_makedepend="2";;
			--without-makedepend)         with_makedepend="0";;
			--with-makedepend=*)          with_makedepend="$optarg";;

			--with-direct-music)          with_direct_music="2";;
			--without-direct-music)       with_direct_music="0";;
			--with-direct-music=*)        with_direct_music="$optarg";;

			--with-xaudio2)               with_xaudio2="2";;
			--without-xaudio2)            with_xaudio2="0";;
			--with-xaudio2=*)             with_xaudio2="$optarg";;

			--with-sort)                  with_sort="2";;
			--without-sort)               with_sort="0";;
			--with-sort=*)                with_sort="$optarg";;

			--with-iconv)                 with_iconv="2";;
			--without-iconv)              with_iconv="0";;
			--with-iconv=*)               with_iconv="$optarg";;

			--with-midi=*)                with_midi="$optarg";;
			--with-midi-arg=*)            with_midi_arg="$optarg";;

			--without-distcc)             with_distcc="0";;
			--with-distcc)                with_distcc="2";;
			--with-distcc=*)              with_distcc="$optarg";;

			--without-ccache)             with_ccache="0";;
			--with-ccache)                with_ccache="2";;
			--with-ccache=*)              with_ccache="$optarg";;

			--without-nforenum)           with_nforenum="0";;
			--with-nforenum)              with_nforenum="2";;
			--with-nforenum=*)            with_nforenum="$optarg";;

			--without-grfcodec)           with_grfcodec="0";;
			--with-grfcodec)              with_grfcodec="2";;
			--with-grfcodec=*)            with_grfcodec="$optarg";;

			--without-osx-sysroot)        with_osx_sysroot="0";;
			--with-osx-sysroot)           with_osx_sysroot="2";;
			--with-osx-sysroot=*)         with_osx_sysroot="$optarg";;

			--without-application-bundle) with_application_bundle="0";;
			--with-application-bundle)    with_application_bundle="1";;
			--with-application-bundle=*)  with_application_bundle="$optarg";;

			--without-threads)            with_threads="0";;
			--with-threads)               with_threads="1";;
			--with-threads=*)             with_threads="$optarg";;

			--without-sse)                with_sse="0";;
			--with-sse)                   with_sse="1";;
			--with-sse=*)                 with_sse="$optarg";;

			--without-libbfd)             with_libbfd="0";;
			--with-libbfd)                with_libbfd="1";;
			--with-libbfd=*)              with_libbfd="$optarg";;

			--without-bfd-extra-debug)    with_bfd_extra_debug="0";;
			--with-bfd-extra-debug)       with_bfd_extra_debug="1";;
			--with-bfd-extra-debug=*)     with_bfd_extra_debug="$optarg";;

			--without-self-gdb-debug)     with_self_gdb_debug="0";;
			--with-self-gdb-debug)        with_self_gdb_debug="1";;
			--with-self-gdb-debug=*)      with_self_gdb_debug="$optarg";;

			--without-self-lldb-debug)     with_self_lldb_debug="0";;
			--with-self-lldb-debug)        with_self_lldb_debug="1";;
			--with-self-lldb-debug=*)      with_self_lldb_debug="$optarg";;

			--without-sigaltstack)        with_sigaltstack="0";;
			--with-sigaltstack)           with_sigaltstack="1";;
			--with-sigaltstack=*)         with_sigaltstack="$optarg";;

			CC=* | --CC=*)                CC="$optarg";;
			CXX=* | --CXX=*)              CXX="$optarg";;
			CFLAGS=* | --CFLAGS=*)        CFLAGS="$optarg";;
			CXXFLAGS=* | --CXXFLAGS=*)    CXXFLAGS="$optarg";;
			LDFLAGS=* | --LDFLAGS=*)      LDFLAGS="$optarg";;
			CFLAGS_BUILD=* | --CFLAGS_BUILD=* | --CFLAGS-BUILD=*)     CFLAGS_BUILD="$optarg";;
			CXXFLAGS_BUILD=* | --CXXFLAGS_BUILD=* | --CXXFLAGS-BUILD=*) CXXFLAGS_BUILD="$optarg";;
			LDFLAGS_BUILD=* | --LDFLAGS_BUILD=* | --LDFLAGS-BUILD=*)   LDFLAGS_BUILD="$optarg";;
			PKG_CONFIG_PATH=* | --PKG_CONFIG_PATH=* | --PKG-CONFIG-PATH=*) PKG_CONFIG_PATH="$optarg";;
			PKG_CONFIG_LIBDIR=* | --PKG_CONFIG_LIBDIR=* | --PKG-CONFIG-LIBDIR=*) PKG_CONFIG_LIBDIR="$optarg";;

			--ignore-extra-parameters)    ignore_extra_parameters="1";;

			--* | -*)
				if [ "$ignore_extra_parameters" = "0" ]; then
					log 1 "Unknown option $p"
					exit 1
				else
					log 1 "Unknown option $p ignored"
				fi
				;;
		esac
	done

	if [ -n "$prev_p" ]; then
		log 1 "configure: error: missing argument to --$prev_p"
		exit 1
	fi

	# Clean the logfile
	echo "" > $config_log
	log 2 "Invocation: $0 $*"
	if [ "$ignore_extra_parameters" = "0" -o ! -f config.invocation ]; then
		echo "$0 $*" > config.invocation
		CONFIGURE_INVOCATION="$0 $*"
	else
		CONFIGURE_INVOCATION="`cat config.invocation`"
	fi
}

save_params() {
	# Here we save all params, so we can later on do an exact redo of this
	#  configuration, without having the user to re-input stuff

	echo "Running configure with following options:" >> $config_log
	echo "" >> $config_log

	configure="$CONFIGURE_EXECUTABLE --ignore-extra-parameters"
	for p in $save_params_array; do
		eval "v=\"\$$p\""
		p=`echo "$p" | sed 's@_@-@g;s@\n@@g;s@ @\\ @g'`
		# Only save those params that aren't empty
		configure="$configure --$p=\"$v\""
	done

	echo "$configure" >> $config_log
	echo "$configure" > config.cache
	echo "" >> $config_log
}

# Export a variable so tools like pkg-config can see it when invoked.
# If the variable contains an empty string then unset it.
# $1 - name of the variable to export or unset
export_or_unset() {
	eval local value=\$$1
	if [ -n "$value" ]; then
		export $1;
		log 2 "using $1=$value";
	else
		unset $1;
		log 2 "not using $1";
	fi
}

check_params() {
	# Some params want to be in full uppercase, else they might not work as
	# expected.. fix that here

	os=`echo $os | tr '[a-z]' '[A-Z]'`
	cpu_type=`echo $cpu_type | tr '[a-z]' '[A-Z]'`

	# Export some variables to be used by pkg-config
	#
	# PKG_CONFIG_LIBDIR variable mustn't be set if we are not willing to
	# override the default pkg-config search path, it mustn't be an empty
	# string. If the variable is empty (e.g. when an empty string comes
	# from config.cache) then unset it. This way the "don't override" state
	# will be properly preserved when (re)configuring.
	export_or_unset PKG_CONFIG_PATH
	export_or_unset PKG_CONFIG_LIBDIR

	# Check if all params have valid values

	# OS only allows DETECT, UNIX, OSX, FREEBSD, DRAGONFLY, OPENBSD, NETBSD, HAIKU, SUNOS, CYGWIN, MINGW, and OS2
	if [ -z "`echo $os | egrep '^(DETECT|UNIX|OSX|FREEBSD|DRAGONFLY|OPENBSD|NETBSD|HPUX|HAIKU|SUNOS|CYGWIN|MINGW|OS2)$'`" ]; then
		log 1 "configure: error: invalid option --os=$os"
		log 1 " Available options are: --os=[DETECT|UNIX|OSX|FREEBSD|DRAGONFLY|OPENBSD|NETBSD|HPUX|HAIKU|SUNOS|CYGWIN|MINGW|OS2]"
		exit 1
	fi
	# cpu_type can be either 32 or 64
	if [ -z "`echo $cpu_type | egrep '^(32|64|DETECT)$'`" ]; then
		log 1 "configure: error: invalid option --cpu-type=$cpu_type"
		log 1 " Available options are: --cpu-type[=DETECT|32|64]"
		exit 1
	fi
	# enable_debug should be between 0 and 4
	if [ -z "`echo $enable_debug | egrep '^[0123]$'`" ]; then
		log 1 "configure: error: invalid option --enable-debug=$enable_debug"
		log 1 " Available options are: --enable-debug[=0123]"
		exit 1
	fi

	# enable_desync_debug should be between 0 and 3
	if [ -z "`echo $enable_desync_debug | egrep '^[012]$'`" ]; then
		log 1 "configure: error: invalid option --enable-desync-debug=$enable_desync_debug"
		log 1 " Available options are: --enable-desync-debug[=012]"
		exit 1
	fi

	detect_awk

	detect_os

	check_build
	check_host

	# Check for universal builds; they only make sense for OSX, so fail if enabled for another OS
	if [ "$enable_universal" = "0" ]; then
		log 1 "checking universal build... no"
	else
		if [ "$os" != "OSX" ]; then
			log 1 "configure: error: --enable-universal only works on OSX"
			exit 1
		fi
		log 1 "checking universal build... yes, for: $enable_universal"
	fi

	# Already detected by check_build
	log 1 "checking build cc... $cc_build"
	log 1 "checking host cc... $cc_host"

	check_cxx_build
	check_cxx_host
	check_windres
	if [ "$enable_strip" != "0" ]; then
		check_strip
	else
		log 1 "checking strip... disabled"
	fi
	check_lipo

	if [ "$enable_builtin_depend" != "0" ]; then
		log 1 "checking builtin depend... yes"
		makedepend="\$(SRC_OBJS_DIR)/\$(DEPEND)"
	else
		log 1 "checking builtin depend... no"
	fi

	check_makedepend
	detect_cputype
	detect_sse_capable_architecture

	if [ "$enable_static" = "1" ]; then
		if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
			enable_static="2"
		else
			enable_static="0"
		fi
	fi

	if [ "$enable_static" != "0" ]; then
		log 1 "checking static... yes"

		if [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ] && [ "$os" != "OSX" ]; then
			log 1 "WARNING: static is only known to work on Windows, and MacOSX"
			log 1 "WARNING: use static at your own risk on this platform"

			sleep 5
		fi
	else
		log 1 "checking static... no"
	fi

	if [ "$enable_unicode" = "1" ]; then
		if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
			enable_unicode="2"
		else
			enable_unicode="0"
		fi
	fi

	if [ "$enable_unicode" != "0" ]; then
		log 1 "checking unicode... yes"
	else
		log 1 "checking unicode... no"
	fi

	# Show what we configured
	if [ "$enable_debug" = "0" ]; then
		log 1 "using debug level... no"
	elif [ "$enable_profiling" != "0" ]; then
		log 1 "using debug level... profiling (debug level $enable_debug)"
	else
		log 1 "using debug level... level $enable_debug"
	fi

	if [ "$enable_desync_debug" = "0" ]; then
		log 1 "using desync debug level... no"
	else
		log 1 "using desync debug level... level $enable_desync_debug"
		log 1 "WARNING: desync debug functions slow down the game considerably."
		log 1 "WARNING: use only when you are instructed to do so"
		log 1 "         or when you know what you are doing."

		sleep 5
	fi

	if [ "$enable_lto" != "0" ]; then
		# GCC 4.5 outputs '%{flto}', GCC 4.6 outputs '%{flto*}'
		has_lto=`($cxx_build -dumpspecs 2>&1 | grep '\%{flto') || ($cxx_build -help ipo 2>&1 | grep '\-ipo')`
		if [ -n "$has_lto" ]; then
			log 1 "using link time optimization... yes"
		else
			enable_lto="0"
			log 1 "using link time optimization... no"
			log 1 "WARNING: you selected link time optimization but it is not found."
			sleep 5
		fi
	else
		log 1 "using link time optimization... no"
	fi


	if [ "$os" != "OSX" ] && [ "$with_osx_sysroot" != "0" ]; then
		if [ "$with_osx_sysroot" = "1" ]; then
			with_osx_sysroot="0"

			log 1 "checking OSX sysroot... not OSX, skipping"
		else
			log 1 "configure: error: --with-osx-sysroot only works if OSX is the target"
			exit 1
		fi
	fi

	if [ "$with_osx_sysroot" != "0" ]; then
		if [ "$enable_universal" = "0" ] && [ "$with_osx_sysroot" != "1" ] && [ "$with_osx_sysroot" != "2" ]; then
			# Sysroot manually specified? Check for usability
			log 1 "checking OSX sysroot... $with_osx_sysroot"
			if ! check_osx_sdk "$with_osx_sysroot"; then
				log 1 "Passed sysroot not found/not functional"
				exit 1
			fi
		else
			# If autodetect and no universal, use system default
			if [ "$with_osx_sysroot" = "1" ] && [ "$enable_universal" = "0" ]; then
				log 1 "checking OSX sysroot... no (use system default)"
			else
				log 1 "checking OSX sysroot... automatically"
				detect_osx_sdk
			fi
		fi

		if [ -n "$osx_sdk_path" ]; then
			if [ "$enable_universal" != "0" ]; then
				if [ -z "$osx_sdk_104_path" ]; then
					log 1 "WARNING: Could not find a usable 10.4u SDK, the resulting"
					log 1 "WARNING: binary will only run on OSX 10.5 or later"
					osx_sdk_104_path="$osx_sdk_path"
				fi
				OSX_SYSROOT="-isysroot $osx_sdk_104_path"
				OSX_LD_SYSROOT="-Wl,-syslibroot,$osx_sdk_104_path"
			else
				OSX_SYSROOT="-isysroot $osx_sdk_path"
				OSX_LD_SYSROOT="-Wl,-syslibroot,$osx_sdk_path"
			fi
		fi
	else
		if [ "$os" = "OSX" ]; then
			log 1 "checking OSX sysroot... no (use system default)"
		fi
	fi

	detect_allegro
	detect_sdl
	detect_cocoa

	if [ "$enable_dedicated" != "0" ]; then
		log 1 "checking GDI video driver... dedicated server, skipping"
		log 1 "checking dedicated... found"
	else
		if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
			log 1 "checking GDI video driver... found"
		else
			log 1 "checking GDI video driver... not Windows, skipping"
		fi

		if [ -z "$allegro_config" ] && [ -z "$sdl2_config" ] && [ -z "$sdl_config" ] && [ "$with_cocoa" = 0 ] && [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ]; then
			log 1 "configure: error: no video driver development files found"
			log 1 " If you want a dedicated server use --enable-dedicated as parameter"
			exit 1
		else
			log 1 "checking dedicated... not selected"
		fi
	fi

	if [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ]; then
		log 1 "checking console application... not Windows, skipping"
	elif [ "$enable_console" = "1" ] && [ "$enable_dedicated" != "0" ]; then
		log 1 "checking console application... dedicated server, enabled"
		enable_console="2"
	elif [ "$enable_console" = "1" ]; then
		log 1 "checking console application... disabled (only used when forced)"
		enable_console="0"
	elif [ "$enable_console" = "0" ]; then
		log 1 "checking console application... disabled"
	else
		log 1 "checking console application... enabled"
	fi

	log 1 "checking squirrel... found"
	SCRIPT_SRC_DIR="$ROOT_DIR/src/3rdparty/squirrel/include"

	if [ "$enable_translator" != "0" ]; then
		log 1 "checking translator... debug"
		# -t shows TODO items, normally they are muted
		strgen_flags="-t"
	else
		log 1 "checking translator... no"
		strgen_flags=""
	fi

	if [ "$enable_assert" != "0" ]; then
		log 1 "checking assert... enabled"
	else
		log 1 "checking assert... disabled"
	fi

	pre_detect_with_zlib=$with_zlib
	detect_zlib

	if [ "$with_zlib" = "0" ] || [ -z "$zlib_config" ]; then
		log 1 "WARNING: zlib was not detected or disabled"
		log 1 "WARNING: OpenTTD doesn't require zlib, but it does mean that many features"
		log 1 "WARNING: (like loading most old savegames/scenarios, loading heightmaps,"
		log 1 "WARNING: using PNG, or using fonts, ...) will be disabled."
		if [ "$pre_detect_with_zlib" = "0" ]; then
			log 1 "WARNING: We strongly suggest you to install zlib."
		else
			log 1 "configure: error: no zlib detected"
			log 1 " If you want to compile without zlib use --without-zlib as parameter"
			exit
		fi
	fi

	pre_detect_with_lzma=$with_lzma
	detect_lzma

	if [ "$with_lzma" = "0" ] || [ -z "$lzma_config" ]; then
		log 1 "WARNING: lzma was not detected or disabled"
		log 1 "WARNING: OpenTTD doesn't require lzma, but it does mean that many features"
		log 1 "WARNING: (like loading most savegames/scenarios and joining most servers)"
		log 1 "WARNING: will be disabled."
		if [ "$pre_detect_with_lzma" = "0" ]; then
			log 1 "WARNING: We strongly suggest you to install liblzma."
			log 1 "configure: error: no liblzma detected"
		else
			log 1 " If you want to compile without lzma use --without-lzma as parameter"
			exit
		fi
	fi

	pre_detect_with_lzo2=$with_lzo2
	detect_lzo2

	if [ "$with_lzo2" = "0" ] || [ -z "$lzo2" ]; then
		log 1 "WARNING: liblzo2 was not detected or disabled"
		log 1 "WARNING: OpenTTD doesn't require liblzo2, but it does mean that"
		log 1 "WARNING: loading old savegames/scenarios will be disabled."
		if [ "$pre_detect_with_lzo2" = "0" ]; then
			log 1 "WARNING: We strongly suggest you to install liblzo2."
		else
			log 1 "configure: error: no liblzo2 detected"
			log 1 " If you want to compile without liblzo2 use --without-liblzo2 as parameter"
			exit
		fi
	fi

	if [ "$with_uniscribe" != "0" ]; then
		if [ "$os" != "MINGW" ]; then
			if [ "$with_uniscribe" != "1" ]; then
				log 1 "configure: error: Uniscribe is only supported on native Win32 targets"
				exit 1
			fi
			with_uniscribe="0"

			log 1 "checking Uniscribe text layout... not Windows, skipping"
		else
			log 1 "checking Uniscribe text layout... found"

			# Don't use ICU unless forced.
			if [ "$with_icu_layout" = "1" ]; then
				with_icu_layout="0"
			fi
			if [ "$with_icu_sort" = "1" ]; then
				with_icu_sort="0"
			fi
		fi
	fi

	detect_xdg_basedir
	detect_fcitx
	detect_png
	detect_freetype
	detect_fontconfig
	detect_icu_layout
	detect_icu_sort
	detect_fluidsynth

	if [ "$with_direct_music" != "0" ]; then
		if [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ]; then
			if [ "$with_direct_music" != "1" ]; then
				log 1 "configure: error: direct-music is only supported on Win32 targets"
				exit 1
			fi
			with_direct_music="0"

			log 1 "checking direct-music... not Windows, skipping"
		else
			check_direct_music
		fi
	fi

	if [ "$with_xaudio2" != "0" ]; then
		if [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ]; then
			if [ "$with_xaudio2" != "1" ]; then
				log 1 "configure: error: xaudio2 is only supported on Win32 targets"
				exit 1
			fi
			with_xaudio2="0"

			log 1 "checking xaudio2... not Windows, skipping"
		else
			check_xaudio2
		fi
	fi

	detect_sort

	# Suppress language errors when there is a version defined, indicating a release
	#  It just isn't pretty if any release produces warnings in the languages.
	if [ -f "$ROOT_DIR/version" ]; then
		lang_suppress="yes"
		log 1 "suppress language errors... yes"
	else
		lang_suppress=""
		log 1 "suppress language errors... no"
	fi

	if [ "$enable_debug" = "0" ] && [ "$enable_profiling" = "0" ] && [ "$enable_strip" != "0" ]; then
		if [ "$os" = "OSX" ]; then
			strip_arg=""
		elif [ "$os" = "OS2" ]; then
			strip_arg=""
			# OS2 uses strip via gcc, because it needs to be feed to emxbind
			LDFLAGS="$LDFLAGS -s"
		elif [ "$os" = "SUNOS" ]; then
			# The GNU strip does know -s, the non-GNU doesn't
			#  So try to detect it (in a bit of an ugly way)
			strip_arg="`$strip -s strip.test 2>/dev/null && echo \"-s\"`"
		else
			strip_arg="-s"
		fi

		log 1 "checking stripping... $strip $strip_arg"
	else
		strip=""
		log 1 "checking stripping... skipped"
	fi

	if [ "$with_distcc" = "0" ]; then
		log 1 "checking distcc... no"
	elif [ "$with_distcc" = "1" ]; then
		with_distcc="0"

		log 1 "checking distcc... no (only used when forced)"
	elif [ "$with_distcc" = "2" ]; then
		distcc="distcc"
	else
		distcc="$with_distcc"
	fi
	if [ "$with_distcc" != "0" ]; then
		res="`$distcc --version 2>/dev/null | head -n 1 | cut -b 1-6`"
		if [ "$res" != "distcc" ]; then
			distcc=""
			log 1 "checking distcc... no"
			if [ "$with_distcc" = "2" ]; then
				log 1 "configure: error: no distcc detected, but was forced to be used"
				exit 1
			fi
			if [ "$with_distcc" != "1" ]; then
				log 1 "configure: error: '$with_distcc' doesn't seem a distcc to me"
				exit 1
			fi
		fi

		log 1 "checking distcc... $distcc"
	fi

	if [ "$with_ccache" = "0" ]; then
		log 1 "checking ccache... no"
	elif [ "$with_ccache" = "1" ]; then
		with_ccache="0"

		log 1 "checking ccache... no (only used when forced)"
	elif [ "$with_ccache" = "2" ]; then
		ccache="ccache"
	else
		ccache="$with_ccache"
	fi
	if [ "$with_ccache" != "0" ]; then
		res="`$ccache --version 2>/dev/null | head -n 1 | cut -b 1-6`"
		if [ "$res" != "ccache" ]; then
			ccache=""
			log 1 "checking ccache... no"
			if [ "$with_ccache" = "2" ]; then
				log 1 "configure: error: no ccache detected, but was forced to be used"
				exit 1
			fi
			if [ "$with_ccache" != "1" ]; then
				log 1 "configure: error: '$with_ccache' doesn't seem a ccache to me"
				exit 1
			fi
		fi

		log 1 "checking ccache... $ccache"
	fi

	detect_grfcodec
	detect_nforenum

	if [ -z "$grfcodec" ] && [ -n "$nforenum" ]; then
		log 1 "checking nforenum/grfcodec... nforenum needs grfcodec enabled, disabling nforenum"
		nforenum=""
	fi

	if [ -z "$nforenum" ] && [ -n "$grfcodec" ]; then
		log 1 "checking nforenum/grfcodec... grfcodec needs nforenum enabled, disabling grfcodec"
		grfcodec=""
	fi

	if [ "$os" != "OSX" ] && [ "$with_application_bundle" != "0" ]; then
		if [ "$with_application_bundle" = "1" ]; then
			with_application_bundle="0"

			log 1 "checking OSX application bundle... not OSX, skipping"
		else
			log 1 "configure: error: --with-application-bundle only works if OSX is the target"
			exit 1
		fi
	fi

	if [ "$os" = "OSX" ] && [ "$with_application_bundle" = "1" ]; then
		OSXAPP="OpenTTD.app"
	else
		OSXAPP=""
	fi

	if [ "$os" = "OSX" ]; then
		# Test on ppc970 (G5) - we can optimize there

		if [ "$enable_osx_g5" != "0" ]; then
			log 1 "detecting ppc970 (G5)... yes (forced)"
		else
			# First, are we a real OSX system, else we can't detect it
			native=`LC_ALL=C uname | tr '[A-Z]' '[a-z]' | grep darwin`
			# If $host doesn't match $build , we are cross-compiling
			if [ -n "$native" ] && [ "$build" = "$host" ]; then
				$cxx_build $SRC_DIR/os/macosx/G5_detector.cpp -o G5_detector
				res=`./G5_detector`
				rm -f G5_detector
				if [ -n "$res" ]; then
					# This is G5, add flags for it
					enable_osx_g5="2"

					log 1 "detecting ppc970 (G5)... yes"
				else
					enable_osx_g5="0"

					log 1 "detecting ppc970 (G5)... no"
				fi
			else
				enable_osx_g5="0"

				log 1 "detecting ppc970 (G5)... no (cross-compiling)"
			fi
		fi
	else
		if [ "$enable_osx_g5" != "0" ]; then
			log 1 "configure: error: ppc970 (OSX G5) selected, but not compiling for OSX"
			log 1 "configure: error: either select OSX as OS, or deselect ppc970"

			exit 1
		fi
	fi

	if { [ -d "$ROOT_DIR/.git" ] || [ -f "$ROOT_DIR/.git" ]; } && [ -n "`git help 2>/dev/null`" ]; then
		log 1 "checking revision... git detection"
	elif [ -f "$ROOT_DIR/.ottdrev-vc" ]; then
		log 1 "checking revision... source release version"
	elif [ -f "$ROOT_DIR/.ottdrev" ]; then
		log 1 "checking revision... source tarball"
	else
		log 1 "checking revision... no detection"
		log 1 "WARNING: there is no means to determine the version."
		log 1 "WARNING: please use a subversion, mercurial, or git checkout of OpenTTD."
		log 1 "WARNING: you can only join game servers that have been compiled without"
		log 1 "WARNING:   version detection."
		log 1 "WARNING: there is a great chance you desync."
		log 1 "WARNING: USE WITH CAUTION!"

		sleep 5
	fi

	if [ "$doc_dir" = "1" ]; then
		if [ "$os" = "UNIX" ] || [ "$os" = "FREEBSD" ] || [ "$os" = "DRAGONFLY" ] || [ "$os" = "OPENBSD" ] || [ "$os" = "NETBSD" ] || [ "$os" = "HPUX" ] || [ "$os" = "SUNOS" ]; then
			doc_dir="share/doc/openttd"
		else
			doc_dir="$data_dir/docs"
		fi
	else
		doc_dir="`echo $doc_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	if [ "$icon_theme_dir" = "1" ]; then
		if [ "$os" = "UNIX" ] || [ "$os" = "FREEBSD" ] || [ "$os" = "DRAGONFLY" ] || [ "$os" = "OPENBSD" ] || [ "$os" = "NETBSD" ] || [ "$os" = "HPUX" ] || [ "$os" = "SUNOS" ]; then
			icon_theme_dir="share/icons/hicolor"
		else
			icon_theme_dir=""
		fi
	else
		icon_theme_dir="`echo $icon_theme_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	if [ "$personal_dir" = "1" ]; then
		if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ] || [ "$os" = "HAIKU" ]; then
			personal_dir="OpenTTD"
		elif [ "$os" = "OSX" ]; then
			personal_dir="Documents/OpenTTD"
		else
			personal_dir=".openttd"
		fi
	else
		personal_dir="`echo $personal_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	if [ "$shared_dir" = "1" ]; then
		# we are using default values
		if [ "$os" = "OSX" ]; then
			shared_dir="/Library/Application\\\\ Support/OpenTTD"
		else
			shared_dir=""
		fi
	else
		shared_dir="`echo $shared_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	if [ "$man_dir" = "1" ]; then
		# add manpage on UNIX systems
		if [ "$os" = "UNIX" ] || [ "$os" = "FREEBSD" ] || [ "$os" = "DRAGONFLY" ] || [ "$os" = "OPENBSD" ] || [ "$os" = "NETBSD" ] || [ "$os" = "HPUX" ] || [ "$os" = "SUNOS" ] || [ "$os" = "OSX" ]; then
			man_dir="share/man/man6"
		else
			man_dir=""
		fi
	else
		man_dir="`echo $man_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	if [ "$menu_dir" = "1" ]; then
		# add a freedesktop menu item only for some UNIX systems
		if [ "$os" = "UNIX" ] || [ "$os" = "FREEBSD" ] || [ "$os" = "DRAGONFLY" ] || [ "$os" = "OPENBSD" ] || [ "$os" = "NETBSD" ] || [ "$os" = "HPUX" ] || [ "$os" = "SUNOS" ]; then
			menu_dir="share/applications"
		else
			menu_dir=""
		fi
	else
		menu_dir="`echo $menu_dir | sed 's@\([^\]\)\\\\ @\1\\\\\\\\ @g;s@\([^\]\) @\1\\\\\\\\ @g'`"
	fi

	detect_iconv

	if [ -n "$personal_dir" ]
	then
		log 1 "personal home directory... $personal_dir"
	else
		log 1 "personal home directory... none"
	fi

	if [ -n "$shared_dir" ]
	then
		log 1 "shared data directory... $shared_dir"
	else
		log 1 "shared data directory... none"
	fi

	if [ -n "$install_dir" ]
	then
		log 1 "installation directory... $install_dir"
	else
		log 1 "installation directory... none"
	fi

	if [ -n "$icon_theme_dir" ]
	then
		log 1 "icon theme directory... $icon_theme_dir"
	else
		log 1 "icon theme directory... none"
	fi

	if [ -n "$man_dir" ]
	then
		log 1 "manual page directory... $man_dir"
	else
		log 1 "manual page directory... none"
	fi

	if [ -n "$menu_dir" ]
	then
		log 1 "menu item directory... $menu_dir"
	else
		log 1 "menu item directory... none"
	fi
}

make_compiler_cflags() {
	# Params:
	# $1 - compiler
	# $2 - name of the cflags variable
	# $3 - name of the cxxflags variable
	# $4 - name of the ldflags variable
	# $5 - name of the features variable

	# Get the compiler to tell us who it is
	version_line="`$1 --version | head -n1`"

	eval eval "flags=\\\$$2"
	eval eval "cxxflags=\\\$$3"
	eval eval "ldflags=\\\$$4"
	eval eval "features=\\\$$5"

	cppstd="-std=c++11"

	if [ `echo "$version_line" | cut -d' ' -f1` = "icc" ]; then
		# Enable some things only for certain ICC versions
		cc_version=`$1 -dumpversion | cut -c 1-4 | sed s@\\\.@@g`

		flags="$flags -rdynamic"
		ldflags="$ldflags -rdynamic"

		if [ -z "$first_time_icc_check" ]; then
			first_time_icc_check=no
			if [ $cc_version -lt 90 ]; then
				log 1 "WARNING: you seem to be using a very old version of ICC"
				log 1 "WARNING: OpenTTD hasn't been tested with this version"
				sleep 5
			elif [ $cc_version -lt 120 ]; then
				log 1 "WARNING: you seem to be using an unsupported ICC version"
				log 1 "WARNING: ICC older than 12.0 is known to fail to compile OpenTTD"
				sleep 5
			fi
		fi

		flags="$flags -Wall"
		# remark #111: statement is unreachable
		flags="$flags -wd111"
		# remark #181: argument is incompatible with corresponding format string conversion
		# ICC is very picky about signedness of operands, warnings provided by GCC are enough
		flags="$flags -wd181"
		# remark #271: trailing comma is nonstandard
		flags="$flags -wd271"
		# remark #280: selector expression is constant
		flags="$flags -wd280"
		# remark #304: access control not specified ("public" by default)
		flags="$flags -wd304"
		# remark #383: value copied to temporary, reference to temporary used
		flags="$flags -wd383"
		# remark #444: destructor for base class ... is not virtual
		flags="$flags -wd444"
		# remark #593: variable ... was set but never used
		flags="$flags -wd593"
		# warning #654: overloaded virtual function ... is only partially overridden in class ...
		flags="$flags -wd654"
		# remark #810: conversion from ... to ... may lose significant bits
		flags="$flags -wd810"
		# remark #869: parameter ... was never referenced
		flags="$flags -wd869"
		# warning #873: function ... ::operator new ... has no corresponding operator delete ...
		flags="$flags -wd873"
		# remark #981: operands are evaluated in unspecified order
		flags="$flags -wd981"
		# remark #1418: external function definition with no prior declaration
		flags="$flags -wd1418"
		# remark #1419: external declaration in primary source file
		flags="$flags -wd1419"
		# remark #1572: floating-point equality and inequality
		flags="$flags -wd1572"
		# remark #1599: declaration hides variable/parameter ...
		flags="$flags -wd1599"
		# remark #1720: function ... ::operator new ... has no corresponding member operator delete ...
		flags="$flags -wd1720"

		if [ $cc_version -lt 110 ]; then
			# warns about system headers with recent glibc:
			# warning #1292: attribute "__nonnull__" ignored
			flags="$flags -wd1292"
		fi

		if [ $cc_version -ge 100 ]; then
			# warning #1899: multicharacter character literal (potential portability problem)
			flags="$flags -wd1899"
			# vec report defaults to telling where it did loop vectorisation, which is not very important
			flags="$flags -vec-report=0 "
		fi

		if [ $cc_version -ge 110 ]; then
			# remark #2259: non-pointer conversion from ... to ... may lose significant bits
			flags="$flags -wd2259"
		fi

		if [ $cc_version -lt 140 ]; then
			log 1 "configure: error: ICC version is too old: `$1 -dumpversion`, minumum: 14.0"
			exit 1
		fi

		if [ "$enable_lto" != "0" ]; then
			has_ipo=`$1 -help ipo | grep '\-ipo'`
			if [ -n "$has_ipo" ]; then
				# Use IPO (only if we see IPO exists and is requested)
				flags="$flags -ipo"
				features="$features lto"
			fi
		fi
	elif echo "$version_line" | grep -q "clang"; then
		# Enable some things only for certain clang versions
		# Need to try really hard to get the version line, because OSX clang likes to hide its true version
		cc_version="`$1 -v 2>&1 | grep -i version | head -n 1 | sed s@[^0-9.]@@g | $awk -F . '{printf "%d%02d\n", $1, $2}'`"

		# aliasing rules are not held in openttd code
		flags="$flags -fno-strict-aliasing"

		# -W alone doesn't enable all warnings enabled by -Wall; on the other hand,
		# -Weverything enables too many useless warnings that can't be disabled (as of 3.0)
		flags="$flags -Wall -W -Wextra"

		# warning: unused parameter '...'
		flags="$flags -Wno-unused-parameter"

		# warning: expression result unused
		flags="$flags -Wno-unused-value"

		# warning: multi-character character constant
		flags="$flags -Wno-multichar"

		# warning: explicitly assigning a variable of type '...' to itself
		# it happens when using the FOR_ALL_WINDOWS_FROM_BACK_FROM macro
		flags="$flags -Wno-self-assign"

		# warning: <something> is a C++11 extension
		flags="$flags -Wno-c++11-extensions"

		if [ "$cc_version" -lt "300" ]; then
			# warning: equality comparison with extraneous parentheses
			flags="$flags -Wno-parentheses"
			# warning: operands of ? are integers of different signs: 'unsigned int' and 'int'
			flags="$flags -Wno-sign-compare"
		fi

		if [ "$cc_version" -ge "300" ]; then
			# warning: equality comparison with extraneous parentheses
			# this warning could be useful, but it warns about code in squirrel
			flags="$flags -Wno-parentheses-equality"
		fi

		if [ "$with_ccache" != "0" -o "$with_distcc" != "0" ]; then
			# ccache and distcc run separate preprocess and compile passes,
			# both are fed with the same CFLAGS. Unfortunately, clang
			# complains about -I when compiling preprocessed files:
			# "clang: warning: argument unused during compilation: '-I /usr/include'"
			flags="$flags -Qunused-arguments"
		fi

		if [ "$enable_assert" -eq "0" ]; then
			# do not warn about unused variables when building without asserts
			flags="$flags -Wno-unused-variable"
		fi

		if [ "$cc_version" -lt "303" ]; then
			log 1 "configure: error: clang version is too old: `$1 -v 2>&1 | grep -i version | head -n 1`, minumum: 3.3"
			exit 1
		fi

		# rdynamic is used to get useful stack traces from crash reports.
		ldflags="$ldflags -rdynamic"

	# Assume gcc, since it just uses argv[0] in its --version output
	else
		# Enable some things only for certain GCC versions
		# cc_version = major_version * 100 + minor_version
		# For example: "3.3" -> 303, "4.9.2" -> 409, "6" -> 600, "23.5" -> 2305
		cc_version=`$1 -dumpversion | $awk -F . '{printf "%d%02d", $1, $2}'`

		if [ $cc_version -lt 303 ]; then
			log 1 "configure: error: gcc older than 3.3 can't compile OpenTTD because of its poor template support"
			exit 1
		fi

		flags="$flags -Wall -Wno-multichar -Wsign-compare -Wundef"
		flags="$flags -Wwrite-strings -Wpointer-arith"
		flags="$flags -W -Wno-unused-parameter -Wredundant-decls"
		flags="$flags -Wformat=2 -Wformat-security"
		cppstd="-std=gnu++11"

		if [ $enable_assert -eq 0 ]; then
			# Do not warn about unused variables when building without asserts
			flags="$flags -Wno-unused-variable"
			if [ $cc_version -ge 406 ]; then
				# GCC 4.6 gives more warnings, disable them too
				flags="$flags -Wno-unused-but-set-variable"
				flags="$flags -Wno-unused-but-set-parameter"
			fi
		fi

		if [ $cc_version -ge 304 ]; then
			# Warn when a variable is used to initialise itself:
			# int a = a;
			flags="$flags -Winit-self"
		fi

		if [ $cc_version -ge 400 ]; then
			# GCC 4.0+ complains about that we break strict-aliasing.
			#  On most places we don't see how to fix it, and it doesn't
			#  break anything. So disable strict-aliasing to make the
			#  compiler all happy.
			flags="$flags -fno-strict-aliasing"
			# Warn about casting-out 'const' with regular C-style cast.
			#  The preferred way is const_cast<>() which doesn't warn.
			flags="$flags -Wcast-qual"
		fi

		if [ $cc_version -ge 402 ]; then
			# GCC 4.2+ automatically assumes that signed overflows do
			# not occur in signed arithmetic, whereas we are not
			# sure that they will not happen. It furthermore complains
			# about its own optimized code in some places.
			flags="$flags -fno-strict-overflow"
			# GCC 4.2 no longer includes -Wnon-virtual-dtor in -Wall.
			# Enable it in order to be consistent with older GCC versions.
			flags="$flags -Wnon-virtual-dtor"
		fi

		if [ $cc_version -eq 405 ]; then
			# Prevent optimisation supposing enums are in a range specified by the standard
			# For details, see http://gcc.gnu.org/PR43680
			flags="$flags -fno-tree-vrp"
		fi

		if [ $cc_version -eq 407 ]; then
			# Disable -Wnarrowing which gives many warnings, such as:
			# warning: narrowing conversion of '...' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
			# They are valid according to the C++ standard, but useless.
			cxxflags="$cxxflags -Wno-narrowing"
		fi

		if [ $cc_version -ge 407 ]; then
			# Disable bogus 'attempt to free a non-heap object' warning
			flags="$flags -Wno-free-nonheap-object"
		else
			log 1 "configure: error: GCC version is too old: `$1 -dumpversion`, minumum: 4.7"
			exit 1
		fi

		if [ $cc_version -ge 600 ]; then
			# -flifetime-dse=2 (default since GCC 6) doesn't play
			# well with our custom pool item allocator
			cxxflags="$cxxflags -flifetime-dse=1"
		fi

		if [ "$enable_lto" != "0" ]; then
			# GCC 4.5 outputs '%{flto}', GCC 4.6 outputs '%{flto*}'
			has_lto=`$1 -dumpspecs | grep '\%{flto'`
			if [ -n "$has_lto" ]; then
				# Use LTO only if we see LTO exists and is requested
				if [ $cc_version -lt 406 ]; then
					flags="$flags -flto"
				else
					flags="$flags -flto=jobserver"
				fi
				ldflags="$ldflags -fwhole-program"
				features="$features lto"
			fi
		fi

		has_rdynamic=`$1 -dumpspecs | grep rdynamic`
		if [ -n "$has_rdynamic" ]; then
			# rdynamic is used to get useful stack traces from crash reports.
			flags="$flags -rdynamic"
			ldflags="$ldflags -rdynamic"
		fi
	fi

	eval "$2=\"$flags\""
	eval "$3=\"$cxxflags $cppstd\""
	eval "$4=\"$ldflags\""
	eval "$5=\"$features\""
}

test_compile_libbfd() {
	log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.bfd -x c++ - $1"
	"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.bfd -x c++ - $1 2> /dev/null << EOL
		#define PACKAGE 1
		#define PACKAGE_VERSION 1
		#include <bfd.h>
		#include <unistd.h>
		int main() {
			bfd_init();
			bfd *abfd = bfd_openr("test", "test");
			bfd_check_format(abfd, bfd_object);
			bfd_get_file_flags(abfd);
			bfd_map_over_sections(abfd, (void (*)(bfd*, asection*, void*)) 0, (void *) 0);
			asymbol *syms = 0;
			long symcount = bfd_read_minisymbols(abfd, false, (void**) &syms, (unsigned int *) 0);
			bfd_get_section_flags(abfd, (asection*) 0);
			bfd_get_section_vma(abfd, (asection*) 0);
			bfd_section_size(abfd, (asection*) 0);
			bfd_find_nearest_line(abfd, (asection*) 0, (asymbol **) 0, (bfd_vma) 0, (const char **) 0, (const char **) 0, (unsigned int *) 0);
			return (int) symcount;
		}
EOL
	ret=$?
	rm -f tmp.config.bfd
	log 2 "  exit code $ret"
	return $ret
}

make_cflags_and_ldflags() {
	# General CFlags for BUILD
	CFLAGS_BUILD_ENV="$CFLAGS_BUILD"
	CFLAGS_BUILD=""
	# Special CXXFlags for BUILD
	CXXFLAGS_BUILD_ENV="$CXXFLAGS_BUILD"
	CXXFLAGS_BUILD=""
	# LDFLAGS for BUILD
	LDFLAGS_BUILD_ENV="$LDFLAGS_BUILD"
	LDFLAGS_BUILD=""
	# FEATURES for BUILD (lto)
	FEATURES_BUILD=""
	# General CFlags for HOST
	CFLAGS_ENV="$CFLAGS"
	CFLAGS=""
	# Special CXXFlags for HOST
	CXXFLAGS_ENV="$CXXFLAGS"
	CXXFLAGS=""
	# Libs to compile. In fact this is just LDFLAGS
	LIBS=""
	# LDFLAGS used for HOST
	LDFLAGS_ENV="$LDFLAGS"
	LDFLAGS=""
	# FEATURES for HOST (lto)
	FEATURES=""

	make_compiler_cflags "$cc_build" "CFLAGS_BUILD" "CXXFLAGS_BUILD" "LDFLAGS_BUILD" "FEATURES_BUILD"
	make_compiler_cflags "$cc_host" "CFLAGS" "CXXFLAGS" "LDFLAGS" "FEATURES"

	CFLAGS="$CFLAGS -D$os"
	CFLAGS_BUILD="$CFLAGS_BUILD -D$os"

	if [ "$enable_static" != "0" ]; then
		STATIC_FLAGS="--static"
	else
		STATIC_FLAGS=""
	fi

	if [ "$enable_debug" = "0" ]; then
		# No debug, add default stuff
		OBJS_SUBDIR="release"

		if [ "$enable_profiling" = "0" ]; then
			# -fomit-frame-pointer and -pg do not go well together (gcc errors they are incompatible)
			CFLAGS="-fomit-frame-pointer $CFLAGS"
		fi
		CFLAGS="-O2 $CFLAGS"
	else
		OBJS_SUBDIR="debug"

		# Each debug level reduces the optimization by a bit
		if [ $enable_debug -ge 1 ]; then
			CFLAGS="$CFLAGS -g -D_DEBUG"
		fi
		if [ $enable_debug -ge 2 ]; then
			CFLAGS="$CFLAGS -fno-inline"
		fi
		if [ $enable_debug -ge 3 ]; then
			CFLAGS="$CFLAGS -O0"
		else
			CFLAGS="$CFLAGS -O2"
		fi
	fi

	if [ $enable_debug -le 2 ]; then
		cc_host_is_gcc=`basename "$cc_host" | grep "gcc" 2>/dev/null`
		if [ -n "$cc_host_is_gcc" ]; then
			# Define only when compiling with GCC. Some GLIBC versions use GNU
			# extensions in a way that breaks build with at least ICC.
			# This requires -O1 or more, so debug level 3 (-O0) is excluded.
			CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
		fi

		cc_build_is_gcc=`basename "$cc_build" | grep "gcc" 2>/dev/null`
		if [ -n "$cc_build_is_gcc" ]; then
			# Add -O1 and fortify source to the tools needed for building, on gcc
			CFLAGS_BUILD="$CFLAGS_BUILD -D_FORTIFY_SOURCE=2 -O1"
		elif [ -n "`basename "$cc_build" | grep "clang" 2>/dev/null`" ]; then
			# Add -O1 to the tools needed for building, on clang
			CFLAGS_BUILD="$CFLAGS_BUILD -O1"
		fi
	fi

	if [ "$os" = "OSX" ] && [ $cc_version -eq 400 ]; then
		# Apple's GCC 4.0 has a compiler bug for x86_64 with (higher) optimization,
		# wrongly optimizing ^= in loops. This disables the failing optimisation.
		CFLAGS="$CFLAGS -fno-expensive-optimizations"
	fi

	if [ "$enable_profiling" != "0" ]; then
		CFLAGS="$CFLAGS -pg"
		LDFLAGS="$LDFLAGS -pg"
	fi

	if [ "$with_threads" = "0" ]; then
		CFLAGS="$CFLAGS -DNO_THREADS"
	fi
	if [ "$with_sse" = "1" ]; then
		CFLAGS="$CFLAGS -DWITH_SSE"
	fi

	if [ "`echo $1 | cut -c 1-3`" != "icc" ]; then
		if [ "$os" = "CYGWIN" ]; then
			flags="$flags -mwin32"
			LDFLAGS="$LDFLAGS -mwin32"
		fi
		if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
			if [ $cc_version -lt 406 ]; then
				flags="$flags -mno-cygwin"
				LDFLAGS="$LDFLAGS -mno-cygwin"
			fi

			if [ "$enable_console" != "0" ]; then
				LDFLAGS="$LDFLAGS -Wl,--subsystem,console"
			else
				LDFLAGS="$LDFLAGS -Wl,--subsystem,windows"
			fi

			LIBS="$LIBS -lws2_32 -lwinmm -lusp10 -lgdi32 -ldxguid -lole32 -limm32"

			if [ $cc_version -ge 404 ]; then
				LDFLAGS_BUILD="$LDFLAGS_BUILD -static-libgcc -static-libstdc++"
			fi
			if [ $cc_version -ge 407 ]; then
				CFLAGS="$CFLAGS -mno-ms-bitfields"
			fi
		fi
	fi

	if [ "$os" != "CYGWIN" ] && [ "$os" != "HAIKU" ] && [ "$os" != "OPENBSD" ] && [ "$os" != "MINGW" ] && [ "$os" != "OSX" ] && [ "$os" != "OS2" ]; then
		LIBS="$LIBS -lpthread"
	fi
	if [ "$os" != "CYGWIN" ] && [ "$os" != "HAIKU" ] && [ "$os" != "MINGW" ] && [ "$os" != "MORPHOS" ] && [ "$os" != "OSX" ] && [ "$os" != "DOS" ] && [ "$os" != "WINCE" ] && [ "$os" != "PSP" ] && [ "$os" != "OS2" ]; then
		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.libdl -x c++ - -ldl"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.libdl -x c++ - -ldl 2> /dev/null << EOL
			#include <dlfcn.h>
			int main() {
				Dl_info info;
				return dladdr(0, &info);
			}
EOL
		ret=$?
		rm -f tmp.config.libdl
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking libdl... no"
		else
			log 1 "checking libdl... found"
			LIBS="$LIBS -ldl"
			CFLAGS="$CFLAGS -DWITH_DL"
		fi

		LIBBFD_LIBS=
		if [ "$with_libbfd" = "1" ]; then
			if test_compile_libbfd "-lbfd -lz"; then
				LIBBFD_LIBS="-lbfd -lz"
			elif test_compile_libbfd "-lbfd -liberty -lz"; then
				LIBBFD_LIBS="-lbfd -liberty -lz"
			elif test_compile_libbfd "-lbfd -liberty -lintl -lz"; then
				LIBBFD_LIBS="-lbfd -liberty -lintl -lz"
			fi
			if [ -n "$LIBBFD_LIBS" ]; then
				log 1 "checking libbfd... found"
				LIBS="$LIBS $LIBBFD_LIBS"
				CFLAGS="$CFLAGS -DWITH_BFD"
			else
				log 1 "checking libbfd... no"
			fi
		else
			log 1 "checking libbfd... disabled"
		fi

		HAVE_GDB_DBG=
		if [ "$with_self_gdb_debug" = "1" ]; then
			log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.dbggdb -x c++ -"
			"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.dbggdb -x c++ - 2> /dev/null << EOL
				#include <unistd.h>
				#include <sys/stat.h>
				#include <fcntl.h>
				#include <sys/syscall.h>
				#include <sys/types.h>
				#include <sys/wait.h>
				int main() {
					pid_t tid = syscall(SYS_gettid);
					int status;
					waitpid((pid_t) 0, &status, 0);
					return WIFEXITED(status) && WEXITSTATUS(status);
				}
EOL
			ret=$?
			rm -f tmp.config.dbggdb
			log 2 "  exit code $ret"
			if [ $ret -ne 0 ]; then
				log 1 "checking dbg gdb... no"
			else
				log 1 "checking dbg gdb... found"
				CFLAGS="$CFLAGS -DWITH_DBG_GDB"
				HAVE_GDB_DBG=1

				log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.dbggdbprctl -x c++ -"
				"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.dbggdbprctl -x c++ - 2> /dev/null << EOL
					#include <sys/prctl.h>
					int main() {
						return prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
					}
EOL
				ret=$?
				rm -f tmp.config.dbggdbprctl
				log 2 "  exit code $ret"
				if [ $ret -ne 0 ]; then
					log 1 "checking dbg gdb (prctl)... no"
				else
					log 1 "checking dbg gdb (prctl)... found"
					CFLAGS="$CFLAGS -DWITH_PRCTL_PT"
				fi
			fi
		else
			log 1 "checking dbg gdb... disabled"
		fi

		if [ -n "$LIBBFD_LIBS" -o -n "$HAVE_GDB_DBG" ]; then
			if [ $enable_debug -lt 1 ] && [ "$with_bfd_extra_debug" = "1" ]; then
				if [ -n "`basename "$cc_host" | grep "clang" 2>/dev/null`" ]; then
					CFLAGS="$CFLAGS -gline-tables-only"
				else
					CFLAGS="$CFLAGS -g1"
				fi
			fi
		fi

		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.sigaction -x c++ - -ldl"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.sigaction -x c++ - -ldl 2> /dev/null << EOL
			#include <signal.h>
			void *addr;
			int code;
			void handler(int sig, siginfo_t *si, void *context) {
				addr = si->si_addr;
				code = si->si_code;
			}
			int main() {
				struct sigaction sa;
				sa.sa_flags = SA_SIGINFO;
				sigemptyset(&sa.sa_mask);
				sa.sa_sigaction = handler;
				sigaction(SIGSEGV, &sa, 0);
				return 0;
			}
EOL
		ret=$?
		rm -f tmp.config.sigaction
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking sigaction... no"
		else
			log 1 "checking sigaction... found"
			CFLAGS="$CFLAGS -DWITH_SIGACTION"
		fi

		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.ucontext -x c++ - -ldl"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.ucontext -x c++ - -ldl 2> /dev/null << EOL
			#include <ucontext.h>
			int main() {
				ucontext_t context;
#if defined(__x86_64__)
				void *ptr = (void *) context.uc_mcontext.gregs[REG_RIP];
#elif defined(__i386)
				void *ptr = (void *) context.uc_mcontext.gregs[REG_EIP];
#else
#error Unknown arch
#endif
				return 0;
			}
EOL
		ret=$?
		rm -f tmp.config.ucontext
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking ucontext... no"
		else
			log 1 "checking ucontext... found"
			CFLAGS="$CFLAGS -DWITH_UCONTEXT"
		fi

		if [ "$with_sigaltstack" = "1" ]; then
			log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.sigaltstack -x c++ - -ldl"
			"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.sigaltstack -x c++ - -ldl 2> /dev/null << EOL
				#include <signal.h>
				#include <stdlib.h>
				int main() {
					stack_t ss;
					ss.ss_sp = calloc(SIGSTKSZ, 1);
					ss.ss_size = SIGSTKSZ;
					ss.ss_flags = 0;
					sigaltstack(&ss, nullptr);
					return 0;
				}
EOL
			ret=$?
			rm -f tmp.config.sigaltstack
			log 2 "  exit code $ret"
			if [ $ret -ne 0 ]; then
				log 1 "checking sigaltstack... no"
			else
				log 1 "checking sigaltstack... found"
				CFLAGS="$CFLAGS -DWITH_SIGALTSTACK"
			fi
		else
			log 1 "checking sigaltstack... disabled"
		fi
	fi

	if [ "$os" = "MINGW" ]; then
		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.dbghelp -x c++ -"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.dbghelp -x c++ - 2> /dev/null << EOL
			#include <windows.h>
			#include <dbghelp.h>
			int main() {
				STACKFRAME64 frame;
				IMAGEHLP_SYMBOL64 *sym_info;
				IMAGEHLP_MODULE64 module;
				IMAGEHLP_LINE64 line;
				return 0;
			}
EOL
		ret=$?
		rm -f tmp.config.dbghelp
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking dbghelp... no"
		else
			log 1 "checking dbghelp... found"
			CFLAGS="$CFLAGS -DWITH_DBGHELP"

			if [ "$with_libbfd" = "1" ]; then
				test_compile_libbfd "-lbfd -liberty -lintl -lz"
				if [ $? -ne 0 ]; then
					log 1 "checking libbfd... no"
				else
					log 1 "checking libbfd... found"
					LIBS="$LIBS -lbfd -liberty -lintl -lz"
					CFLAGS="$CFLAGS -DWITH_BFD"

					if [ $enable_debug -lt 1 ] && [ "$with_bfd_extra_debug" = "1" ]; then
						CFLAGS="$CFLAGS -g1"
					fi
				fi
			else
				log 1 "checking libbfd... disabled"
			fi
		fi
	fi

	log 2 "executing $cc_host $CFLAGS $LDFLAGS $STATIC_FLAGS -o tmp.config.bitmath-builtins -x c++ -"
	"$cc_host" $CFLAGS $LDFLAGS $STATIC_FLAGS -o tmp.config.bitmath-builtins -x c++ - 2> /dev/null << EOL
		int main() {
			return __builtin_popcountll(__builtin_popcountl(__builtin_popcount(__builtin_ctz(1))));
		}
EOL
	ret=$?
	rm -f tmp.config.bitmath-builtins
	log 2 "  exit code $ret"
	if [ $ret -ne 0 ]; then
		log 1 "checking bitmath builtins... no"
	else
		log 1 "checking bitmath builtins... found"
		CFLAGS="$CFLAGS -DWITH_BITMATH_BUILTINS"
	fi

	if [ "$os" != "CYGWIN" ] && [ "$os" != "HAIKU" ] && [ "$os" != "MORPHOS" ] && [ "$os" != "OSX" ] && [ "$os" != "DOS" ] && [ "$os" != "WINCE" ] && [ "$os" != "PSP" ] && [ "$os" != "OS2" ]; then
		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.demangle -x c++ - -lstdc++"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV -o tmp.config.demangle -x c++ - -lstdc++ 2> /dev/null << EOL
			#include <cxxabi.h>
			int main() {
				int status = -1;
				char *demangled = abi::__cxa_demangle("test", 0, 0, &status);
				return 0;
			}
EOL
		ret=$?
		rm -f tmp.config.demangle
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking abi::__cxa_demangle... no"
		else
			log 1 "checking abi::__cxa_demangle... found"
			CFLAGS="$CFLAGS -DWITH_DEMANGLE"
		fi
	fi

	if [ "$os" != "CYGWIN" ] && [ "$os" != "HAIKU" ] && [ "$os" != "MINGW" ]; then
		LIBS="$LIBS -lc"
	fi

	if [ "$os" = "OPENBSD" ]; then
		LIBS="$LIBS -pthread"
	fi

	if [ "$os" = "OSX" ]; then
		LDFLAGS="$LDFLAGS -framework Cocoa"

		# Add macports include dir which is not always set a default system dir. This avoids zillions of bogus warnings.
		CFLAGS="$CFLAGS -isystem/opt/local/include"

		if [ "$enable_dedicated" = "0" ] && ([ "$cpu_type" = "32" ] || [ "$enable_universal" != "0" ]); then
			LIBS="$LIBS -framework QuickTime"
		else
			CFLAGS="$CFLAGS -DNO_QUICKTIME"
		fi

		if [ "$enable_universal" = "0" ]; then
			# Universal builds set this elsewhere
			CFLAGS="$OSX_SYSROOT $CFLAGS"
			LDFLAGS="$OSX_LD_SYSROOT $LDFLAGS"
		fi

		if [ "$with_self_lldb_debug" = "0" ]; then
			log 1 "using dbg lldb... disabled"
			CFLAGS="$CFLAGS -DWITHOUT_DBG_LLDB"
		else
			log 1 "using dbg lldb... yes"
			if [ $enable_debug -lt 1 ]; then
				if [ -n "`"$cc_host" --version | head -n1 | grep "clang" 2>/dev/null`" ]; then
					CFLAGS="$CFLAGS -gline-tables-only"
				else
					CFLAGS="$CFLAGS -g1"
				fi
			fi
		fi

		log 2 "executing $cc_host $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.ucontext -x c++ - -ldl"
		"$cc_host" $CFLAGS $CFLAGS_ENV $LDFLAGS $LDFLAGS_ENV $STATIC_FLAGS -o tmp.config.ucontext -x c++ - -ldl 2> /dev/null << EOL
			#include <sys/ucontext.h>
			int main() {
				ucontext_t context;
#if defined(__x86_64__)
				void *ptr = (void *) context.uc_mcontext->__ss.__rip;
#elif defined(__i386)
				void *ptr = (void *) context.uc_mcontext->__ss.__rip;
#else
#error Unknown arch
#endif
				return 0;
			}
EOL
		ret=$?
		rm -f tmp.config.ucontext
		log 2 "  exit code $ret"
		if [ $ret -ne 0 ]; then
			log 1 "checking ucontext... no"
		else
			log 1 "checking ucontext... found"
			CFLAGS="$CFLAGS -DWITH_UCONTEXT"
		fi

		# workaround for issues with MacOS 10.15 Catalina and stack_not_16_byte_aligned_error issues
		CFLAGS="$CFLAGS -fno-stack-check"
	fi

	if [ "$os" = "HAIKU" ]; then
		LIBS="$LIBS -lmidi -lbe"
	fi

	# Most targets act like UNIX, just with some additions
	if [ "$os" = "HAIKU" ] || [ "$os" = "OSX" ] || [ "$os" = "FREEBSD" ] || [ "$os" = "DRAGONFLY" ] || [ "$os" = "OPENBSD" ] || [ "$os" = "NETBSD" ] || [ "$os" = "HPUX" ] || [ "$os" = "SUNOS" ] || [ "$os" = "OS2" ]; then
		CFLAGS="$CFLAGS -DUNIX"
	fi
	# And others like Windows
	if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
		CFLAGS="$CFLAGS -DWIN"
	fi

	if [ -n "$allegro_config" ]; then
		CFLAGS="$CFLAGS -DWITH_ALLEGRO"
		CFLAGS="$CFLAGS `$allegro_config --cflags`"
		if [ "$os" != "MINGW" ] && [ "$os" != "CYGWIN" ]; then
			if [ "$enable_static" != "0" ]; then
				LIBS="$LIBS `$allegro_config --static --libs`"
			else
				LIBS="$LIBS `$allegro_config --libs`"
			fi
		fi
	fi

	if [ -n "$sdl2_config" ]; then
		CFLAGS="$CFLAGS -DWITH_SDL2"
		# SDL must not add _GNU_SOURCE as it breaks many platforms
		CFLAGS="$CFLAGS `$sdl2_config --cflags | sed 's@-D_GNU_SOURCE[^ ]*@@'`"
		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$sdl2_config --static --libs`"
		else
			LIBS="$LIBS `$sdl2_config --libs`"
		fi
	elif [ -n "$sdl_config" ]; then
		CFLAGS="$CFLAGS -DWITH_SDL"
		# SDL must not add _GNU_SOURCE as it breaks many platforms
		CFLAGS="$CFLAGS `$sdl_config --cflags | sed 's@-D_GNU_SOURCE[^ ]*@@'`"
		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$sdl_config --static --libs`"
		else
			LIBS="$LIBS `$sdl_config --libs`"
		fi
	fi

	if [ "$with_cocoa" != "0" ]; then
		CFLAGS="$CFLAGS -DWITH_COCOA"
		LIBS="$LIBS -F/System/Library/Frameworks -framework Cocoa -framework Carbon -framework AudioUnit -framework AudioToolbox"

		if [ "$enable_cocoa_quartz" != "0" ]; then
			CFLAGS="$CFLAGS -DENABLE_COCOA_QUARTZ"
		fi

		if [ "$enable_cocoa_quickdraw" != "0" ]; then
			CFLAGS="$CFLAGS -DENABLE_COCOA_QUICKDRAW"
		fi
	fi

	if [ "$with_zlib" != "0" ]; then
		CFLAGS="$CFLAGS -DWITH_ZLIB"
		CFLAGS="$CFLAGS `$zlib_config --cflags | tr '\n\r' '  '`"
		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$zlib_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$zlib_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$lzma_config" ]; then
		CFLAGS="$CFLAGS -DWITH_LIBLZMA"
		CFLAGS="$CFLAGS `$lzma_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			CFLAGS="$CFLAGS -DLZMA_API_STATIC"
			LIBS="$LIBS `$lzma_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$lzma_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ "$with_lzo2" != "0" ]; then
		if [ "$enable_static" != "0" ] && [ "$os" != "OSX" ]; then
			LIBS="$LIBS $lzo2"
		else
			LIBS="$LIBS -llzo2"
		fi
		CFLAGS="$CFLAGS -DWITH_LZO"
	fi

	if [ -n "$xdg_basedir_config" ]; then
		CFLAGS="$CFLAGS -DWITH_XDG_BASEDIR"
		CFLAGS="$CFLAGS `$xdg_basedir_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$xdg_basedir_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$xdg_basedir_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$dbus_config" ]; then
		CFLAGS="$CFLAGS -DWITH_DBUS"
		CFLAGS="$CFLAGS `$dbus_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$dbus_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$dbus_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$x11_config" ]; then
		CFLAGS="$CFLAGS -DWITH_X11"
		CFLAGS="$CFLAGS `$x11_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$x11_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$x11_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$fcitx_config" ]; then
		CFLAGS="$CFLAGS -DWITH_FCITX"
		CFLAGS="$CFLAGS `$fcitx_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$fcitx_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$fcitx_config --libs | tr '\n\r' '  '`"
		fi
	fi

	# 64bit machines need -D_SQ64
	if [ "$cpu_type" = "64" ] && [ "$enable_universal" = "0" ]; then
		CFLAGS="$CFLAGS -D_SQ64"
	fi
	CFLAGS="$CFLAGS -I$SCRIPT_SRC_DIR"

	if [ -n "$png_config" ]; then
		CFLAGS="$CFLAGS -DWITH_PNG"
		CFLAGS="$CFLAGS `$png_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$png_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$png_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$fontconfig_config" ]; then
		CFLAGS="$CFLAGS -DWITH_FONTCONFIG"
		CFLAGS="$CFLAGS `$fontconfig_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$fontconfig_config --libs --static | tr '\n\r' '  '`"
		else
			LIBS="$LIBS `$fontconfig_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$freetype_config" ]; then
		CFLAGS="$CFLAGS -DWITH_FREETYPE"
		CFLAGS="$CFLAGS `$freetype_config --cflags | tr '\n\r' '  '`"

		if [ "$enable_static" != "0" ]; then
			LIBS="$LIBS `$freetype_config --libs --static | tr '\n\r' '  '` -lfreetype"
		else
			LIBS="$LIBS `$freetype_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$icu_layout_config" ]; then
		CFLAGS="$CFLAGS -DWITH_ICU_LX"
		CFLAGS="$CFLAGS `$icu_layout_config --cflags | tr '\n\r' '  '`"

		if [ "$static_icu" != "0" ]; then
			LIBS="$LIBS `$icu_layout_config --libs --static | tr '\n\r' '  ' | sed s/-licu/-lsicu/g`"
		else
			LIBS="$LIBS `$icu_layout_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ -n "$icu_sort_config" ]; then
		CFLAGS="$CFLAGS -DWITH_ICU_I18N"
		CFLAGS="$CFLAGS `$icu_sort_config --cflags | tr '\n\r' '  '`"

		if [ "$static_icu" != "0" ]; then
			LIBS="$LIBS `$icu_sort_config --libs --static | tr '\n\r' '  ' | sed s/-licu/-lsicu/g`"
		else
			LIBS="$LIBS `$icu_sort_config --libs | tr '\n\r' '  '`"
		fi
	fi

	if [ "$with_uniscribe" != "0" ]; then
		CFLAGS="$CFLAGS -DWITH_UNISCRIBE"
		LIBS="$LIBS -lusp10"
	fi

	if [ "$with_direct_music" != "0" ]; then
		CFLAGS="$CFLAGS -DWIN32_ENABLE_DIRECTMUSIC_SUPPORT"
		# GCC 4.0+ doesn't like the DirectX includes (gives tons of
		#  warnings on it we won't be able to fix). For now just
		#  suppress those warnings.
		if [ $cc_version -ge 400 ]; then
			CFLAGS="$CFLAGS -Wno-non-virtual-dtor"
		fi
	fi

	if [ "$with_xaudio2" != "0" ]; then
		CFLAGS="$CFLAGS -DWITH_XAUDIO2"
	fi

	if [ -n "$fluidsynth" ]; then
		LIBS="$LIBS -lfluidsynth"
		CFLAGS="$CFLAGS -DFLUIDSYNTH"
	fi

	if [ "$with_iconv" != "0" ]; then
		CFLAGS="$CFLAGS -DWITH_ICONV"
		if [ "$link_to_iconv" = "yes" ]; then
			LIBS="$LIBS -liconv"
			if [ "$with_iconv" != "2" ]; then
				CFLAGS="$CFLAGS -I$with_iconv/include"
				LIBS="$LIBS -L$with_iconv/lib"
			fi
		fi

		if [ "$os" != "OSX" ] && [ "$have_non_const_iconv" != "no" ]; then
			CFLAGS="$CFLAGS -DHAVE_NON_CONST_ICONV"
		fi
	fi

	if [ -n "$with_midi" ]; then
		CFLAGS="$CFLAGS -DEXTERNAL_PLAYER=\\\\\"$with_midi\\\\\""
	fi
	if [ -n "$with_midi_arg" ]; then
		CFLAGS="$CFLAGS -DMIDI_ARG=\\\\\"$with_midi_arg\\\\\""
	fi

	if [ "$enable_dedicated" != "0" ]; then
		CFLAGS="$CFLAGS -DDEDICATED"
	fi

	if [ "$enable_unicode" != "0" ]; then
		CFLAGS="$CFLAGS -DUNICODE -D_UNICODE"
	fi

	if [ "$os" = "HAIKU" ]; then
		LDFLAGS="$LDFLAGS -lnetwork"
	fi

	if [ "$os" = "SUNOS" ]; then
		LDFLAGS="$LDFLAGS -lnsl -lsocket"
	fi

	if [ "$enable_static" != "0" ]; then
		# OSX can't handle -static in LDFLAGS
		if [ "$os" != "OSX" ]; then
			LDFLAGS="$LDFLAGS -static"
		fi
	fi

	if [ "$enable_assert" = "0" ]; then
		CFLAGS="$CFLAGS -DNDEBUG"
		CFLAGS_BUILD="$CFLAGS_BUILD -DNDEBUG"
	fi

	if [ "$enable_desync_debug" != "0" ]; then
		CFLAGS="$CFLAGS -DRANDOM_DEBUG"
	fi

	if [ "$enable_osx_g5" != "0" ]; then
		CFLAGS="$CFLAGS -mcpu=G5 -mpowerpc64 -mtune=970 -mcpu=970 -mpowerpc-gpopt"
	fi

	if [ -n "$personal_dir" ]; then
		CFLAGS="$CFLAGS -DWITH_PERSONAL_DIR -DPERSONAL_DIR=\\\\\"$personal_dir\\\\\""
	fi

	if [ -n "$shared_dir" ]; then
		CFLAGS="$CFLAGS -DWITH_SHARED_DIR -DSHARED_DIR=\\\\\"$shared_dir\\\\\""
	fi

	CFLAGS="$CFLAGS -DGLOBAL_DATA_DIR=\\\\\"$prefix_dir/$data_dir\\\\\""

	if [ "$enable_lto" != "0" ]; then
		lto_build=`echo "$FEATURES_BUILD" | grep "lto"`
		lto_host=`echo "$FEATURES" | grep "lto"`
		if [ -z "$lto_build$lto_host" ]; then
			log 1 "WARNING: you enabled LTO/IPO, but neither build nor host compiler supports it"
			log 1 "WARNING: LTO/IPO has been disabled"
		fi
		if [ -n "$lto_build" ]; then
			LDFLAGS_BUILD="$LDFLAGS_BUILD $CFLAGS_BUILD $CXXFLAGS_BUILD"
		fi
		if [ -n "$lto_host" ]; then
			LDFLAGS="$LDFLAGS $CFLAGS $CXXFLAGS"
		fi
	fi

	# All flags to be extended via the env
	CFLAGS_BUILD="$CFLAGS_BUILD $CFLAGS_BUILD_ENV"
	CXXFLAGS_BUILD="$CXXFLAGS_BUILD $CXXFLAGS_BUILD_ENV"
	LDFLAGS_BUILD="$LDFLAGS_BUILD $LDFLAGS_BUILD_ENV"
	CFLAGS="$CFLAGS $CFLAGS_ENV"
	CXXFLAGS="$CXXFLAGS $CXXFLAGS_ENV"
	LDFLAGS="$LDFLAGS $LDFLAGS_ENV"

	log 1 "using CFLAGS_BUILD... $CFLAGS_BUILD"
	log 1 "using CXXFLAGS_BUILD... $CXXFLAGS_BUILD"
	log 1 "using LDFLAGS_BUILD... $LDFLAGS_BUILD"
	log 1 "using CFLAGS... $CFLAGS"
	log 1 "using CXXFLAGS... $CXXFLAGS"
	log 1 "using LDFLAGS... $LIBS $LDFLAGS"

	# Makedepend doesn't like something like: -isysroot /OSX/blabla
	#  so convert it to: -isysroot -OSX/blabla. makedepend just ignores
	#  any - command it doesn't know, so we are pretty save.
	# Lovely hackish, not?
	# Btw, this almost always comes from outside the configure, so it is
	#  not something we can control.
	# Also make makedepend aware of compiler's built-in defines.
	if [ "$with_makedepend" != "0" ] || [ "$enable_builtin_depend" != "0" ]; then
		# Append CXXFLAGS possibly containing -std=c++0x
		cflags_makedep="`echo | $cxx_host $CXXFLAGS -E -x c++ -dM - | sed 's@.define @-D@g;s@ .*@ @g;s@(.*)@@g' | tr -d '\r\n'`"

		# Please escape ALL " within ` because e.g. "" terminates the string in some sh implementations
		cflags_makedep="$cflags_makedep `echo \"$CFLAGS\" \"$CXXFLAGS\" | sed 's@ /@ -@g;s@-I[ ]*[^ ]*@@g;s@[ ]*-[^D][^ ]*@@g'`"
	else
		makedepend=""
	fi

	if [ "$with_distcc" != "0" ]; then
		cc_host="$distcc $cc_host"
		cxx_host="$distcc $cxx_host"
		log 1 ""
		log 1 " NOTICE: remind yourself to use 'make -jN' to make use of distcc"
		log 1 ""
	fi

	if [ "$with_ccache" != "0" ]; then
		cc_host="$ccache $cc_host"
		cxx_host="$ccache $cxx_host"
	fi
}

check_compiler() {
	# Params:
	# $1 - Type for message (build / host)
	# $2 - What to fill with the found compiler
	# $3 - System to try
	# $4 - Compiler to try
	# $5 - Env-setting to try
	# $6 - GCC alike to try (array)
	# $7 - CC alike to try
	# $8 - "0" gcc, "1" g++, "2" windres, "3" strip, "4" lipo
	# $9 - What the command is to check for

	if [ -n "$4" ]; then
		# Check for manual compiler
		machine=`$4 $9 2>/dev/null`
		ret=$?
		eval "$2=\"$4\""

		log 2 "executing $4 $9"
		log 2 "  returned $machine"
		log 2 "  exit code $ret"

		if ( [ -z "$machine" ] && [ "$8" != "3" ] ) || [ "$ret" != "0" ]; then
			log 1 "checking $1... $4 not found"
			log 1 "the selected binary doesn't seem to be a $6 binary"
			exit 1
		fi
	elif [ -n "$3" ]; then
		# Check for system
		for val in $6; do
			if [ -z "$6" ]; then
				compiler="$3"
			else
				compiler="$3-$val"
			fi
			machine=`eval $compiler $9 2>/dev/null`
			ret=$?
			eval "$2=\"$compiler\""

			log 2 "executing $compiler $9"
			log 2 "  returned $machine"
			log 2 "  exit code $ret"
			if [ -n "$machine" ] && [ "$ret" = "0" ]; then
				break
			fi
		done

		if ( [ -z "$machine" ] && [ "$8" != "3" ] ) || [ "$ret" != "0" ]; then
			if [ -z "$5" ]; then
				log 1 "checking $1... $compiler not found"
				log 1 "I couldn't detect any '$6' binary for $3"
				exit 1
			else
				compiler="$3-$5"
			fi
			machine=`eval $compiler $9 2>/dev/null`
			ret=$?
			eval "$2=\"$compiler\""

			log 2 "executing $compiler $9"
			log 2 "  returned $machine"
			log 2 "  exit code $ret"

			if ( [ -z "$machine" ] && [ "$8" != "3" ] ) || [ "$ret" != "0" ]; then
				log 1 "checking $1... $compiler not found"
				log 1 "I couldn't detect any $5 binary for $3"
				exit 1
			fi
		fi

		if [ "$machine" != "$3" ] && ( [ "$8" = "0" ] || [ "$8" = "1" ] ); then
			log 1 "checking $1... expected $3, found $machine"
			log 1 "the compiler suggests it doesn't build code for the machine you specified"
			exit 1
		fi
	else
		# Nothing given, autodetect

		if [ -n "$5" ]; then
			machine=`$5 $9 2>/dev/null`
			ret=$?
			eval "$2=\"$5\""

			log 2 "executing $5 $9"
			log 2 "  returned $machine"
			log 2 "  exit code $ret"

			# The user defined a GCC that doesn't reply to $9.. abort
			if ( [ -z "$machine" ] && [ "$8" != "3" ] ) || [ "$ret" != "0" ]; then
				log 1 "checking $1... $5 unusable"
				log 1 "the CC environment variable is set, but it doesn't seem to be a '$6' binary"
				log 1 "please redefine the CC/CXX environment to a $6 binary"
				exit 1
			fi
		else
			log 2 "checking $1... CC/CXX not set (skipping)"

			for val in $6; do
				# No $5, so try next item in '$6'
				machine=`$val $9 2>/dev/null`
				ret=$?
				eval "$2=\"$val\""

				log 2 "executing $val $9"
				log 2 "  returned $machine"
				log 2 "  exit code $ret"
				if [ -n "$machine" ] && [ "$ret" = "0" ]; then
					break
				fi
			done

			if ( [ -z "$machine" ] && [ "$8" != "3" ] ) || [ "$ret" != "0" ]; then
				# Maybe '$7'?
				machine=`$7 $9 2>/dev/null`
				ret=$?
				eval "$2=\"$7\""

				log 2 "executing $7 $9"
				log 2 "  returned $machine"
				log 2 "  exit code $ret"

				# All failed, abort
				if [ -z "$machine" ]; then
					log 1 "checking $1... $6 not found"
					log 1 "I couldn't detect any '$6' binary on your system"
					log 1 "please define the CC/CXX environment to where it is located"

					exit 1
				fi
			fi
		fi
	fi

	if [ "$8" != "0" ]; then
		eval "res=\$$2"
		log 1 "checking $1... $res"
	else
		log 1 "checking $1... $machine"
	fi
}

check_build() {
	check_compiler "build system type" "cc_build" "$build" "$cc_build" "$CC" "$default_cc" "cc" "0" "-dumpmachine"
}

check_host() {
	# By default the host is the build
	if [ -z "$host" ]; then host="$build"; fi

	check_compiler "host system type" "cc_host" "$host" "$cc_host" "$CC" "$default_cc" "cc" "0" "-dumpmachine"
}

check_cxx_build() {
	check_compiler "build c++" "cxx_build" "$build" "$cxx_build" "$CXX" "$default_cxx" "c++" 1 "-dumpmachine"
}

check_cxx_host() {
	# By default the host is the build
	if [ -z "$host" ]; then host="$build"; fi
	check_compiler "host c++" "cxx_host" "$host" "$cxx_host" "$CXX" "$default_cxx" "c++" 1 "-dumpmachine"
}

check_windres() {
	if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
		check_compiler "host windres" "windres" "$host" "$windres" "$WINDRES" "windres" "windres" "2" "-V"
	fi
}

check_strip() {
	if [ "$os" = "OS2" ]; then
		# OS2 via gcc is a bit weird.. stripping HAS to be done via emxbind, which is via gcc directly
		log 1 "checking host strip... using gcc -s option"
	elif [ "$os" = "OSX" ]; then
		# Most targets have -V in strip, to see if they exists... OSX doesn't.. so execute something
		echo "int main(int argc, char *argv[]) { }" > strip.test.c
		$cxx_host strip.test.c -o strip.test
		check_compiler "host strip" "strip" "$host" "$strip" "$STRIP" "strip" "strip" "3" "strip.test"
		rm -f strip.test.c strip.test
	else
		check_compiler "host strip" "strip" "$host" "$strip" "$STRIP" "strip" "strip" "3" "-V"
	fi
}

check_lipo() {
	if [ "$os" = "OSX" ] && [ "$enable_universal" != "0" ]; then
		echo "int main(int argc, char *argv[]) { }" > lipo.test.c
		$cxx_host lipo.test.c -o lipo.test
		check_compiler "host lipo" "lipo" "$host" "$lipo" "$LIPO" "lipo" "lipo" "4" "-info lipo.test"
		rm -f lipo.test.c lipo.test
	fi
}

check_osx_sdk() {
	local sysroot=""
	if [ -n "$1" ]; then
		if echo "$1" | grep -q / ; then
			# Seems to be a file system path
			osx_sdk_path="$1"
		else
			osx_sdk_path="/Developer/SDKs/MacOSX$1.sdk"
		fi
		if [ ! -d "$osx_sdk_path" ]; then
			# No directory, not present or garbage
			return 1
		fi

		# Set minimum version to 10.4 as that's when kCGBitmapByteOrder32Host was introduced
		sysroot="-isysroot $osx_sdk_path -Wl,-syslibroot,$osx_sdk_path -mmacosx-version-min=10.4"
	fi

cat > tmp.osx.mm << EOF
#include <Cocoa/Cocoa.h>
int main() {
	kCGBitmapByteOrder32Host;
	return 0;
}
EOF
	execute="$cxx_host $sysroot $CFLAGS tmp.osx.mm -framework Cocoa -o tmp.osx 2>&1"
	eval $execute > /dev/null
	ret=$?
	log 2 "executing $execute"
	log 2 "  exit code $ret"
	rm -f tmp.osx.mm tmp.osx
	return $ret
}

check_direct_music() {
	echo "
		#include <windows.h>
		#include <dmksctrl.h>
		#include <dmusicc.h>
		int main(int argc, char *argv[]) { }" > direct_music.test.c
	$cxx_host $CFLAGS direct_music.test.c -o direct_music.test 2> /dev/null
	res=$?
	rm -f direct_music.test.c direct_music.test

	if [ "$res" != "0" ]; then
		if [ "$with_direct_music" != "1" ]; then
			log 1 "configure: error: direct-music is not available on this system"
			exit 1
		fi
		with_direct_music="0"

		log 1 "checking direct-music... not found"
	else
		log 1 "checking direct-music... found"
	fi
}

check_xaudio2() {
	echo "
		#include <windows.h>

		#undef NTDDI_VERSION
		#undef _WIN32_WINNT

		#define NTDDI_VERSION    NTDDI_WIN8
		#define _WIN32_WINNT	 _WIN32_WINNT_WIN8

		#include <xaudio2.h>
		int main(int argc, char *argv[]) { }" > xaudio2.test.c
	$cxx_host $CFLAGS xaudio2.test.c -o xaudio2.test 2> /dev/null
	res=$?
	rm -f xaudio2.test.c xaudio2.test

	if [ "$res" != "0" ]; then
		if [ "$with_xaudio2" != "1" ]; then
			log 1 "configure: error: xaudio2 is not available on this system"
			exit 1
		fi
		with_xaudio2="0"

		log 1 "checking xaudio2... not found"
	else
		log 1 "checking xaudio2... found"
	fi
}

check_makedepend() {
	if [ "$enable_builtin_depend" != "0" ]; then
		with_makedepend="0"
	fi

	if [ "$with_makedepend" = "0" ]; then
		log 1 "checking makedepend... disabled"
		return
	fi

	if [ "$with_makedepend" = "1" ] || [ "$with_makedepend" = "2" ]; then
		makedepend="makedepend"
	else
		makedepend="$with_makedepend"
	fi

	rm -f makedepend.tmp
	touch makedepend.tmp
	res=`$makedepend -fmakedepend.tmp 2>/dev/null`
	res=$?
	log 2 "executing $makedepend -f makedepend.tmp"
	log 2 "  returned `cat makedepend.tmp`"
	log 2 "  exit code $ret"

	if [ ! -s makedepend.tmp ]; then
		rm -f makedepend.tmp makedepend.tmp.bak

		if [ "$with_makedepend" = "2" ]; then
			log 1 "checking makedepend... not found"

			log 1 "I couldn't detect any makedepend on your system"
			log 1 "please locate it via --makedepend=[binary]"

			exit 1
		elif [ "$with_makedepend" != "1" ]; then
			log 1 "checking makedepend... $makedepend not found"

			log 1 "the selected file doesn't seem to be a valid makedepend binary"

			exit 1
		else
			log 1 "checking makedepend... not found"

			with_makedepend="0"
			return
		fi
	fi

	rm -f makedepend.tmp makedepend.tmp.bak

	log 1 "checking makedepend... $makedepend"
}

check_version() {
	# $1 - requested version (major.minor)
	# $2 - version we got (major.minor)

	if [ -z "$2" ]; then
		return 0
	fi

	req_major=`echo $1 | cut -d. -f1`
	got_major=`echo $2 | cut -d. -f1`
	if [ $got_major -lt $req_major ]; then
		return 0
	elif [ $got_major -gt $req_major ]; then
		return 1
	fi

	req_minor=`echo $1 | cut -d. -f2`
	got_minor=`echo $2 | cut -d. -f2`
	if [ $got_minor -lt $req_minor ]; then
		return 0
	elif [ $got_minor -gt $req_minor ]; then
		return 1
	fi

	req_micro=`echo $1 | cut -d. -f3`
	got_micro=`echo $2 | cut -d. -f3`
	if [ -z "$req_micro" ]; then
		return 1
	elif [ -z "$got_micro" ]; then
		return 0
	elif [ $got_micro -lt $req_micro ]; then
		return 0
	else
		return 1
	fi
}

detect_awk() {
	# Not all awks allow gsub(), so we test for that here! It is in fact all we need...

	# These awks are known to work. Test for them explicit
	awks="gawk mawk nawk"

	awk_prefix="echo \"a.c b.c c.c\" | tr ' ' \\\\n | "
	awk_param="' { ORS = \" \" } /\.c$/   { gsub(\".c$\",   \".o\", \$0); print \$0; }' 2>/dev/null"
	awk_result="a.o b.o c.o "
	log 2 "Detecing awk..."

	log 2 "Trying: $awk_prefix $awk $awk_param"
	res=`eval $awk_prefix $awk $awk_param`
	log 2 "Result: '$res'"
	if [ "$res" != "$awk_result" ] && [ "$awk" = "awk" ]; then
		# User didn't supply his own awk, so try to detect some other known working names for an awk
		for awk in $awks; do
			log 2 "Trying: $awk_prefix $awk $awk_param"
			res=`eval $awk_prefix $awk $awk_param`
			log 2 "Result: '$res'"
			if [ "$res" = "$awk_result" ]; then break; fi
		done

		if [ "$res" != "$awk_result" ]; then
			log 1 "checking awk... not found"
			log 1 "configure: error: no awk found"
			log 1 "configure: error: please install one of the following: $awks"
			exit 1
		fi
	fi
	if [ "$res" != "$awk_result" ]; then
		log 1 "checking awk... not found"
		log 1 "configure: error: you supplied '$awk' but it doesn't seem a valid gawk or mawk"
		exit 1
	fi

	log 1 "checking awk... $awk"
}

detect_os() {
	if [ "$os" = "DETECT" ]; then
		# Detect UNIX, OSX, FREEBSD, DRAGONFLY, OPENBSD, NETBSD, HPUX, SUNOS, CYGWIN, MINGW, and OS2

		# Try first via dumpmachine, then via uname
		os=`echo "$host" | tr '[A-Z]' '[a-z]' | $awk '
					/linux/        { print "UNIX";      exit}
					/darwin/       { print "OSX";       exit}
					/freebsd/      { print "FREEBSD";   exit}
					/dragonfly/    { print "DRAGONFLY"; exit}
					/openbsd/      { print "OPENBSD";   exit}
					/netbsd/       { print "NETBSD";    exit}
					/hp-ux/        { print "HPUX";      exit}
					/haiku/        { print "HAIKU";     exit}
					/sunos/        { print "SUNOS";     exit}
					/solaris/      { print "SUNOS";     exit}
					/cygwin/       { print "CYGWIN";    exit}
					/mingw/        { print "MINGW";     exit}
					/os2/          { print "OS2";       exit}
		'`

		if [ -z "$os" ]; then
			os=`LC_ALL=C uname | tr '[A-Z]' '[a-z]' | $awk '
					/linux/        { print "UNIX";      exit}
					/darwin/       { print "OSX";       exit}
					/freebsd/      { print "FREEBSD";   exit}
					/dragonfly/    { print "DRAGONFLY"; exit}
					/openbsd/      { print "OPENBSD";   exit}
					/netbsd/       { print "NETBSD";    exit}
					/hp-ux/        { print "HPUX";      exit}
					/haiku/        { print "HAIKU";     exit}
					/sunos/        { print "SUNOS";     exit}
					/cygwin/       { print "CYGWIN";    exit}
					/mingw/        { print "MINGW";     exit}
					/os\/2/        { print "OS2";       exit}
					/gnu/          { print "UNIX";      exit}
			'`
		fi

		if [ -z "$os" ]; then
			log 1 "detecting OS... none detected"
			log 1 "I couldn't detect your OS. Please use --os=OS to force one"
			log 1 "Allowed values are: UNIX, OSX, FREEBSD, DRAGONFLY, OPENBSD, NETBSD, HPUX, HAIKU, SUNOS, CYGWIN, MINGW, and OS2"
			exit 1
		fi

		log 1 "detecting OS... $os"
	else
		log 1 "forcing OS... $os"
	fi
	if [ "$os" = "OSX" ]; then
		default_cc="clang gcc"
		default_cxx="clang++ g++"
	else
		default_cc="gcc clang"
		default_cxx="g++ clang++"
	fi
}

detect_allegro() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_allegro" = "0" ]; then
		log 1 "checking Allegro... disabled"

		allegro_config=""
		return 0
	fi

	if [ "$with_allegro" = "2" ] && [ "$with_cocoa" = "2" ]; then
		log 1 "configure: error: it is impossible to compile both Allegro and COCOA"
		log 1 "configure: error: please deselect one of them and try again"
		exit 1
	fi

	if [ "$with_allegro" = "2" ] && [ "$enable_dedicated" != "0" ]; then
		log 1 "configure: error: it is impossible to compile a dedicated with Allegro"
		log 1 "configure: error: please deselect one of them and try again"
		exit 1
	fi

	if [ "$enable_dedicated" != "0" ]; then
		log 1 "checking Allegro... dedicated server, skipping"

		allegro_config=""
		return 0
	fi

	# By default on OSX we don't use Allegro. The rest is auto-detect
	if [ "$with_allegro" = "1" ] && [ "$os" = "OSX" ] && [ "$with_cocoa" != "0" ]; then
		log 1 "checking Allegro... OSX, skipping"

		allegro_config=""
		return 0
	fi

	detect_pkg_config "$with_allegro" "allegro" "allegro_config" "4.4"
}


detect_sdl() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_sdl" = "0" ]; then
		log 1 "checking SDL... disabled"

		sdl_config=""
		sdl2_config=""
		return 0
	fi

	if [ "$with_sdl" != "1" ] && [ "$with_cocoa" = "2" ]; then
		log 1 "configure: error: it is impossible to compile both SDL and COCOA"
		log 1 "configure: error: please deselect one of them and try again"
		exit 1
	fi

	if [ "$with_sdl" != "1" ] && [ "$enable_dedicated" != "0" ]; then
		log 1 "configure: error: it is impossible to compile a dedicated with SDL"
		log 1 "configure: error: please deselect one of them and try again"
		exit 1
	fi

	if [ "$enable_dedicated" != "0" ]; then
		log 1 "checking SDL... dedicated server, skipping"

		sdl_config=""
		sdl2_config=""
		return 0
	fi

	# By default on OSX we don't use SDL. The rest is auto-detect
	if [ "$with_sdl" = "1" ] && [ "$os" = "OSX" ] && [ "$with_cocoa" != "0" ]; then
		log 1 "checking SDL... OSX, skipping"

		sdl_config=""
		return 0
	fi

	if [ "$os" = "OSX" ]; then
		log 1 "WARNING: sdl is known to fail on some versions of Mac OS X"
		log 1 "WARNING: with some hardware configurations. Use at own risk!"
		sleep 5
	fi

	if [ $with_sdl = "sdl1" ]; then
		detect_pkg_config "2" "sdl" "sdl_config" "1.2"
	elif [ $with_sdl = "sdl2" ]; then
		detect_pkg_config "2" "sdl2" "sdl2_config" "2.0.5"
	else
		sdl2_config=""
		if [ -x `which sdl2-config` ]; then
			detect_pkg_config "$with_sdl" "sdl2" "sdl2_config" "2.0.5"
		fi
		if [ -z "$sdl2_config" ]; then
			detect_pkg_config "$with_sdl" "sdl" "sdl_config" "1.2"
		fi
	fi
}

detect_osx_sdk() {
	# Try to find the best SDK available. For a normal build this
	# is currently the 10.5 SDK as this is needed to compile all
	# optional code. Because such an executable won't run on 10.4
	# or lower, also check for the 10.4u SDK when doing an universal
	# build.

	# Check for the 10.5 SDK, but try 10.6 if that fails
	check_osx_sdk "10.5" ||	check_osx_sdk "10.6" || osx_sdk_path=""

	if [ -z "$osx_sdk_path" ] || [ "$enable_universal" != "0" ]; then
		# No better SDK or universal build enabled? Check 10.4u SDK as well
		local old_sdk="$osx_sdk_path"
		if check_osx_sdk "10.4u"; then
			osx_sdk_104_path="$osx_sdk_path"
		else
			osx_sdk_104_path=""
		fi
		if [ -z "$old_sdk" ]; then
			osx_sdk_path="$osx_sdk_104_path"
		else
			osx_sdk_path="$old_sdk"
		fi
	fi

	if [ -z "$osx_sdk_path" ]; then
		log 1 "Your system SDK is probably too old"
		log 1 "Please install/upgrade your Xcode to >= 2.5"

		exit 1
	fi
}

detect_cocoa() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_cocoa" = "0" ]; then
		log 1 "checking COCOA... disabled"

		return 0
	fi

	if [ "$with_cocoa" = "2" ] && [ "$enable_dedicated" != "0" ]; then
		log 1 "configure: error: it is impossible to compile a dedicated with COCOA"
		log 1 "configure: error: please deselect one of them and try again"
		exit 1
	fi

	if [ "$enable_dedicated" != "0" ]; then
		log 1 "checking COCOA... dedicated server, skipping"

		with_cocoa="0"
		return 0
	fi

	# By default on OSX we use COCOA. The rest doesn't support it
	if [ "$with_cocoa" = "1" ] && [ "$os" != "OSX" ]; then
		log 1 "checking COCOA... not OSX, skipping"

		with_cocoa="0"
		return 0
	fi

	if [ "$os" != "OSX" ]; then
		log 1 "checking COCOA... not OSX"

		log 1 "configure: error: COCOA video driver is only supported for OSX"
		exit 1
	fi

	log 1 "checking COCOA... found"


	if [ "$enable_cocoa_quartz" != "0" ]; then
		log 1 "checking whether to enable the Quartz window subdriver... yes"
	else
		log 1 "checking whether to enable the Quartz window subdriver... no"
	fi

	detect_quickdraw
}

detect_quickdraw() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$enable_cocoa_quickdraw" = "0" ]; then
		log 1 "checking Quickdraw window subdriver... disabled"
		return 0
	fi

	# Assume QuickDraw is available when doing an universal build
	if [ "$enable_universal" != "0" ]; then
		log 1 "checking Quickdraw window subdriver... found"
		return 0
	fi

	# 64 bits doesn't have quickdraw
	if [ "$cpu_type" = "64" ]; then
		enable_cocoa_quickdraw="0"
		log 1 "checking Quickdraw window subdriver... disabled (64 bits)"
		return 0
	fi

cat > tmp.osx.mm << EOF
#include <AvailabilityMacros.h>
#import <Cocoa/Cocoa.h>
int main(int argc, char *argv[]) { SetEmptyRgn(NULL); return 0; }
EOF
	execute="$cxx_host $OSX_SYSROOT $OSX_LD_SYSROOT $CFLAGS -mmacosx-version-min=10.3 tmp.osx.mm -framework Cocoa -o tmp.osx 2>&1"
	eval $execute > /dev/null
	ret=$?
	log 2 "executing $execute"
	log 2 "  exit code $ret"
	rm -f tmp.osx.mm tmp.osx
	if [ "$ret" != "0" ]; then
		log 1 "checking Quickdraw window subdriver... not found"

		# It was forced, so it should be found.
		if [ "$enable_cocoa_quickdraw" != "1" ]; then
			log 1 "configure: error: Quickdraw window driver could not be found"
			exit 1
		fi

		enable_cocoa_quickdraw=0
		return 0
	fi

	enable_cocoa_quickdraw=1
	log 1 "checking Quickdraw window subdriver... found"
}

detect_library() {
	# $1 - config-param ($with_zlib value)
	# $2 - library name ('zlib', sets $zlib)
	# $3 - static library name (libz.a)
	# $4 - header directory ()
	# $5 - header name (zlib.h)
	# $6 - force static (if non-empty)

	if [ -n "$6" ]; then force_static="1"; fi

	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$1" = "0" ]; then
		log 1 "checking $2... disabled"

		eval "$2=\"\""
		return 0
	fi

	log 2 "detecting $2"

	if [ "$1" = "1" ] || [ "$1" = "" ] || [ "$1" = "2" ]; then
		eval "$2=`ls -1 /usr/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
		eval "res=\$$2"
		if [ -z "$res" ]; then
			log 2 "  trying /usr/include/$4$5... no"
			eval "$2=`ls -1 /usr/local/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
		fi
		eval "res=\$$2"
		if [ -z "$res" ]; then
			log 2 "  trying /usr/local/include/$4$5... no"
			eval "$2=`ls -1 /mingw/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
		fi
		eval "res=\$$2"
		if [ -z "$res" ]; then
			log 2 "  trying /mingw/include/$4$5... no"
			eval "$2=`ls -1 /mingw$cpu_type/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
		fi
		eval "res=\$$2"
		if [ -z "$res" ]; then
			log 2 "  trying /mingw$cpu_type/include/$4$5... no"
			eval "$2=`ls -1 /opt/local/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
		fi
		eval "res=\$$2"
		if [ -z "$res" ]; then
			log 2 "  trying /opt/local/include/$4$5... no"
		fi
		if [ -z "$res" ] && [ "$os" = "NETBSD" ]; then
			eval "$2=`ls -1 /usr/pkg/include/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /usr/pkg/include/$4$5... no"
			fi
		fi
		if [ -z "$res" ] && [ "$os" = "HAIKU" ]; then
			if [ -z "$includeDir" ]; then
				includeDir=`finddir B_SYSTEM_HEADERS_DIRECTORY`
			fi
			eval "$2=`ls -1 $includeDir/$4*.h 2>/dev/null | egrep \"\/$5\$\"`"
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying $includeDir/$4$5... no"
			fi
		fi

		eval "res=\$$2"
		if [ -n "$res" ] && ( [ -n "$force_static" ] || ( [ "$enable_static" != "0" ] && [ "$os" != "OSX" ] ) ); then
			eval "res=\$$2"
			log 2 "  trying $res... found"
			# Now find the static lib, if needed
			eval "$2=`ls /lib/*.a 2>/dev/null | egrep \"\/$3\$\"`"
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /lib/$3... no"
				eval "$2=`ls /usr/lib/*.a 2>/dev/null | egrep \"\/$3\$\"`"
			fi
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /usr/lib/$3... no"
				eval "$2=`ls /usr/local/lib/*.a 2>/dev/null | egrep \"\/$3\$\"`"
			fi
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /usr/local/lib/$3... no"
				eval "$2=`ls /mingw/lib/*.a 2>/dev/null | egrep \"\/$3\$\"`"
			fi
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /mingw/lib/$3... no"
				eval "$2=`ls /mingw$cpu_type/lib/*.a 2>/dev/null | egrep \"\/$3\$\"`"
			fi
			eval "res=\$$2"
			if [ -z "$res" ]; then
				log 2 "  trying /mingw$cpu_type/lib/$3... no"
				log 1 "configure: error: $2 couldn't be found"
				log 1 "configure: error: you requested a static link, but I can't find $3"

				exit 1
			fi
		fi
	else
		# Make sure it exists
		if [ -f "$1" ]; then
			eval "$2=`ls $1 2>/dev/null`"
		else
			eval "$2=`ls $1/$3 2>/dev/null`"
		fi
	fi

	eval "res=\$$2"
	if [ -z "$res" ]; then
		log 1 "checking $2... not found"
		if [ "$1" = "2" ]; then
			log 1 "configure: error: $2 couldn't be found"

			exit 1
		elif [ "$1" != "1" ]; then
			log 1 "configure: error: $2 couldn't be found"
			log 1 "configure: error: you supplied '$1', but it seems invalid"

			exit 1
		fi

		eval "with_$2=0"

		return 0
	fi

	eval "res=\$$2"
	log 2 "  trying $res... found"

	log 1 "checking $2... found"
}

detect_zlib() {
	detect_pkg_config "$with_zlib" "zlib" "zlib_config" "1.2"
}

detect_lzo2() {
	detect_library "$with_lzo2" "lzo2" "liblzo2.a" "lzo/" "lzo1x.h"
}

detect_fluidsynth() {
	detect_library "$with_fluidsynth" "fluidsynth" "" "" "fluidsynth.h"
}

detect_pkg_config() {
	# $1 - config-param ($with_lzma value)
	# $2 - package name ('liblzma')
	# $3 - config name ('lzma_config', sets $lzma_config)
	# $4 - minimum module version ('2.3')
	# $5 - check for dedicated, 1 is "skif if dedicated"

	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$1" = "0" ]; then
		log 1 "checking $2... disabled"

		eval "$3=\"\""
		return 0
	fi

	if [ "$5" = "1" ] && [ "$1" = "1" ] && [ "$enable_dedicated" != "0" ]; then
		log 1 "checking $2... dedicated server, skipping"

		eval "$3=\"\""
		return 0
	fi

	log 2 "detecting $2"

	if [ "$1" = "1" ] || [ "$1" = "" ] || [ "$1" = "2" ]; then
		pkg_config_call="$pkg_config $2"
	else
		pkg_config_call="$1"
	fi

	version=`$pkg_config_call --modversion 2>/dev/null`
	ret=$?
	check_version "$4" "$version"
	version_ok=$?
	log 2 "executing $pkg_config_call --modversion"
	log 2 "  returned $version"
	log 2 "  exit code $ret"

	if [ -z "$version" ] || [ "$ret" != "0" ] || [ "$version_ok" != "1" ]; then
		if [ -n "$version" ] && [ "$version_ok" != "1" ]; then
			log 1 "checking $2... needs at least version $4, $2 NOT enabled"
		else
			log 1 "checking $2... not found"
		fi

		# It was forced, so it should be found.
		if [ "$1" != "1" ]; then
			log 1 "configure: error: $pkg_config $2 couldn't be found"
			log 1 "configure: error: you supplied '$1', but it seems invalid"
			exit 1
		fi

		eval "$3=\"\""
		return 0
	fi

	eval "$3=\"$pkg_config_call\""
	log 1 "checking $2... found"
}

detect_lzma() {
	detect_pkg_config "$with_lzma" "liblzma" "lzma_config" "5.0"
}

detect_xdg_basedir() {
	detect_pkg_config "$with_xdg_basedir" "libxdg-basedir" "xdg_basedir_config" "1.2"
}

detect_fcitx() {
	if ([ "$with_fcitx" = "1" ] && [ "$enable_dedicated" = "0" ]) || [ "$with_fcitx" = "2" ]; then
		if [ -z "$sdl2_config" ]; then
			if [ "$with_fcitx" = "2" ]; then
				log 1 "configure: error: fcitx requires sdl2"
				log 1 "configure: error: you supplied --with-fcitx"
				exit 1
			fi
			log 1 "checking fcitx... no sdl2, skipping"
			fcitx_config=""
			dbus_config=""
			x11_config=""
			return 0
		fi
		detect_pkg_config "$with_fcitx" "dbus-1" "dbus_config" "1.0" "1"
		detect_pkg_config "$with_fcitx" "x11" "x11_config" "1.0" "1"
		if [ -z "$dbus_config" ]; then
			log 1 "checking fcitx... no dbus, skipping"
			fcitx_config=""
			dbus_config=""
			x11_config=""
			return 0
		elif [ -z "$x11_config" ]; then
			log 1 "checking fcitx... no x11, skipping"
			fcitx_config=""
			dbus_config=""
			x11_config=""
			return 0
		fi
	fi
	detect_pkg_config "$with_fcitx" "fcitx" "fcitx_config" "4.0" "1"
}

detect_png() {
	detect_pkg_config "$with_png" "libpng" "png_config" "1.2"
}

detect_freetype() {
	if  [ "$with_freetype" = "1" ] && ([ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]); then
		log 1 "checking freetype2... WIN32, skipping"
		freetype_config=""
		return 0
	fi

	detect_pkg_config "$with_freetype" "freetype2" "freetype_config" "2.2" "1"
}

detect_fontconfig() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_fontconfig" = "0" ]; then
		log 1 "checking libfontconfig... disabled"

		fontconfig_config=""
		return 0
	fi
	if [ "$os" = "MINGW" ] || [ "$os" = "CYGWIN" ]; then
		log 1 "checking libfontconfig... WIN32, skipping"
		fontconfig_config=""
		return 0
	fi

	if [ "$os" = "OSX" ]; then
		log 1 "checking libfontconfig... OSX, skipping"
		fontconfig_config=""
		return 0
	fi

	detect_pkg_config "$with_fontconfig" "fontconfig" "fontconfig_config" "2.3" "1"
}

detect_icu_layout() {
	if [ "$with_cocoa" != "0" ] && [ "$with_icu_layout" = "1" ]; then
		log 1 "checking icu-lx... OSX, skipping"
		icu_layout_config=""
		return 0
	fi

	detect_pkg_config "$with_icu_layout" "icu-lx" "icu_layout_config" "4.8" "1"
}

detect_icu_sort() {
	if [ "$with_cocoa" != "0" ] && [ "$with_icu_sort" = "1" ]; then
		log 1 "checking icu-i18n... OSX, skipping"
		icu_sort_config=""
		return 0
	fi

	detect_pkg_config "$with_icu_sort" "icu-i18n" "icu_sort_config" "4.8" "1"
}

detect_iconv() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_iconv" = "0" ]; then
		log 1 "checking iconv... disabled"

		return 0
	fi

	if [ "$with_iconv" = "1" ] && [ "$os" != "OSX" ]; then
		log 1 "checking iconv... not OSX, skipping"
		with_iconv="0"

		return 0
	fi

	# Try to find iconv.h, seems to only thing to detect iconv with

	if [ "$with_iconv" = "1" ] || [ "$with_iconv" = "" ] || [ "$with_iconv" = "2" ]; then
		# Iterate over search paths
		iconv=""
		search_paths=`LC_ALL=C $cxx_host $OSX_SYSROOT $CFLAGS -E - -v </dev/null 2>&1 | \
		              $awk '/#include <...> search starts here:/{flag=1;next}/End of search list./{flag=0}flag'`
		for path in $search_paths; do
			iconv=`ls -1 $path 2>/dev/null | grep "iconv.h"`
			if [ -n "$iconv" ]; then
				break
			fi
		done
	else
		# Make sure it exists
		iconv=`ls $with_iconv/include/iconv.h 2>/dev/null`
	fi

	if [ -z "$iconv" ]; then
		log 1 "checking iconv... not found"
		if [ "$with_iconv" = "2" ]; then
			log 1 "configure: error: iconv couldn't be found"

			exit 1
		elif [ "$with_iconv" != "1" ]; then
			log 1 "configure: error: iconv couldn't be found"
			log 1 "configure: error: you supplied '$with_iconv', but I couldn't detect iconv in it"

			exit 1
		fi

		return 0
	fi

	if [ "$with_iconv" = "1" ]; then
		with_iconv="2"
	fi

	log 2 "found iconv in $iconv"

	log 1 "checking iconv... found"

	# There are different implementations of iconv. The older ones,
	# e.g. SUSv2, pass a const pointer, whereas the newer ones, e.g.
	# IEEE 1003.1 (2004), pass a non-const pointer.

	cat > tmp.iconv.cpp << EOF
#include "src/stdafx.h"
#include <iconv.h>
int main() {
	static char buf[1024];
	iconv_t convd = 0;
	const char *inbuf = "";
	char *outbuf  = buf;
	size_t outlen = 1023;
	size_t inlen  = 0;
	return iconv(convd, &inbuf, &inlen, &outbuf, &outlen);
}
EOF
	execute="$cxx_host $OSX_SYSROOT $CFLAGS -c tmp.iconv.cpp -o tmp.iconv -DTESTING 2>&1"
	eval $execute > /dev/null
	ret=$?
	log 2 "executing $execute"
	log 2 "  exit code $ret"
	if [ "$ret" = "0" ]; then have_non_const_iconv="no"; else have_non_const_iconv="yes"; fi
	log 1 "checking if iconv has non-const inbuf... $have_non_const_iconv"

	cat > tmp.iconv.cpp << EOF
#include "src/stdafx.h"
#include <iconv.h>
int main() {
	static char buf[1024];
	iconv_t convd = 0;
	char *inbuf = "";
	char *outbuf  = buf;
	size_t outlen = 1023;
	size_t inlen  = 0;
	return iconv(convd, &inbuf, &inlen, &outbuf, &outlen);
}
EOF
	execute="$cxx_host $OSX_SYSROOT $OSX_LD_SYSROOT $CFLAGS tmp.iconv.cpp -o tmp.iconv -DTESTING 2>&1"
	eval $execute > /dev/null
	ret=$?
	log 2 "executing $execute"
	log 2 "  exit code $ret"
	if [ "$ret" = "0" ]; then link_to_iconv="no"; else link_to_iconv="yes"; fi
	log 1 "checking whether to link to iconv... $link_to_iconv"
	rm -f tmp.iconv tmp.iconv.cpp
}

_detect_sort() {
	sort_test_in="d
a
c
b"

	sort_test_out="a
b
c
d"

	log 2 "running echo <array> | $1"

	if [ "`echo \"$sort_test_in\" | $1 2>/dev/null`" = "$sort_test_out" ]; then
		sort="$1"
		log 2 "  result was valid"
	else
		log 2 "  result was invalid"
	fi
}

detect_sort() {
	if [ "$with_sort" = "0" ]; then
		log 1 "checking sort... disabled"

		return
	fi

	if [ "$with_sort" = "1" ] || [ "$with_sort" = "2" ]; then
		_detect_sort "sort"
		if [ -z "$sort" ]; then _detect_sort "/sbin/sort"; fi
		if [ -z "$sort" ]; then _detect_sort "/usr/sbin/sort"; fi
		if [ -z "$sort" ]; then _detect_sort "/usr/local/sbin/sort"; fi
		if [ -z "$sort" ]; then _detect_sort "/bin/sort"; fi
		if [ -z "$sort" ]; then _detect_sort "/usr/bin/sort"; fi
		if [ -z "$sort" ]; then _detect_sort "/usr/local/bin/sort"; fi
	else
		_detect_sort "$with_sort"
	fi

	if [ -z "$sort" ]; then
		if [ "$with_sort" = "2" ]; then
			log 1 "checking sort... not found"

			log 1 "configure: error: couldn't detect sort on your system"
			exit 1
		elif [ "$with_sort" != "1" ]; then
			log 1 "checking sort... $with_sort not found"

			log 1 "configure: error: '$with_sort' doesn't look like a sort to me"
			log 1 "configure: error: please verify its location and function and try again"

			exit 1
		else
			log 1 "checking sort... not found"
		fi
	else
		log 1 "checking sort... $sort"
	fi
}

detect_grfcodec() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_grfcodec" = "0" ]; then
		log 1 "checking grfcodec... disabled"

		grfcodec=""
		return 0
	fi

	if [ "$with_grfcodec" = "1" ] || [ "$with_grfcodec" = "" ] || [ "$with_grfcodec" = "2" ]; then
		grfcodec="grfcodec"
	else
		grfcodec="$with_grfcodec"
	fi

	version=`$grfcodec -v 2>/dev/null | $awk '{print $3}' | sed 's/[rM]//g;s/-/0/'`
	ret=$?
	log 2 "executing grfcodec -v"
	log 2 "  returned $version"
	log 2 "  exit code $ret"

	if [ -z "$version" ] || [ "$ret" != "0" ] || [ "$version" -lt "985" ]; then
		if [ -n "$version" ] && [ "$version" -lt "985" ]; then
			log 1 "checking grfcodec... needs at least version 6.0.5 (r985), disabled"
		else
			log 1 "checking grfcodec... not found"
		fi

		# It was forced, so it should be found.
		if [ "$with_grfcodec" != "1" ]; then
			log 1 "configure: error: grfcodec couldn't be found"
			log 1 "configure: error: you supplied '$with_grfcodec', but it seems invalid"
			exit 1
		fi

		grfcodec=""
		return 0
	fi

	log 1 "checking grfcodec... found"
}

detect_nforenum() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_nforenum" = "0" ]; then
		log 1 "checking nforenum... disabled"

		nforenum=""
		return 0
	fi

	if [ "$with_nforenum" = "1" ] || [ "$with_nforenum" = "" ] || [ "$with_nforenum" = "2" ]; then
		nforenum="nforenum"
	else
		nforenum="$with_nforenum"
	fi

	version=`$nforenum -v 2>/dev/null | $awk '{print $3}' | sed 's/[rM]//g;s/-/0/'`
	ret=$?
	log 2 "executing nforenum -v"
	log 2 "  returned $version"
	log 2 "  exit code $ret"

	if [ -z "$version" ] || [ "$ret" != "0" ] || [ "$version" -lt "985" ]; then
		if [ -n "$version" ] && [ "$version" -lt "985" ]; then
			log 1 "checking nforenum... needs at least version 6.0.5 (r985), disabled"
		else
			log 1 "checking nforenum... not found"
		fi

		# It was forced, so it should be found.
		if [ "$with_nforenum" != "1" ]; then
			log 1 "configure: error: nforenum couldn't be found"
			log 1 "configure: error: you supplied '$with_nforenum', but it seems invalid"
			exit 1
		fi

		nforenum=""
		return 0
	fi

	log 1 "checking nforenum... found"
}

_detect_cputype_width() {
	echo "#define _SQ64 1" > $1.cpp
	echo "#include \"src/stdafx.h\"" >> $1.cpp
	echo "assert_compile(sizeof(size_t) == $2);" >> $1.cpp
	echo "int main() { return 0; }" >> $1.cpp
	execute="$cxx_host $CFLAGS -std=c++11 $1.cpp -o $1 -DTESTING 2>&1"
	cpu_type="`eval $execute 2>/dev/null`"
	ret=$?
	log 2 "executing $execute"
	log 2 "  returned $cpu_type"
	log 2 "  exit code $ret"
	rm -f $1 $1.cpp
	return $ret
}

detect_cputype() {
	if [ -n "$cpu_type" ] && [ "$cpu_type" != "DETECT" ]; then
		log 1 "forcing cpu-type... $cpu_type bits"
		return;
	fi
	_detect_cputype_width tmp.32bit 4
	result32=$?
	_detect_cputype_width tmp.64bit 8
	result64=$?

	if [ "$result32" = 0 ] && [ "$result64" != 0 ]; then
		cpu_type="32"
	elif [ "$result32" != 0 ] && [ "$result64" = 0 ]; then
		cpu_type="64"
	else
		log 1 "configure: unable to determine cpu-type (pointer width)"
		exit 1
	fi
	log 1 "detecting cpu-type... $cpu_type bits"
}

detect_sse_capable_architecture() {
	# 0 means no, 1 is auto-detect, 2 is force
	if [ "$with_sse" = "0" ]; then
		log 1 "checking SSE... disabled"
		return
	fi

	echo "#define _SQ64 1" > tmp.sse.cpp
	echo "#include <xmmintrin.h>" >> tmp.sse.cpp
	echo "#include <smmintrin.h>" >> tmp.sse.cpp
	echo "#include <tmmintrin.h>" >> tmp.sse.cpp
	echo "int main() { return 0; }" >> tmp.sse.cpp
	execute="$cxx_host -msse4.1 $CFLAGS tmp.sse.cpp -o tmp.sse 2>&1"
	sse="`eval $execute 2>/dev/null`"
	ret=$?
	log 2 "executing $execute"
	log 2 "  returned $sse"
	log 2 "  exit code $ret"
	if [ "$ret" = "0" ]; then
		log 1 "detecting SSE... found"
	else
		# It was forced, so it should be found.
		if [ "$with_sse" != "1" ]; then
			log 1 "configure: error: SSE couldn't be found"
			log 1 "configure: error: you force enabled SSE, but it seems unavailable"
			exit 1
		fi

		log 1 "detecting SSE... not found"
		with_sse="0"
	fi
	rm -f tmp.sse tmp.exe tmp.sse.cpp
}

make_sed() {
	T_CFLAGS="$CFLAGS"
	T_CXXFLAGS="$CXXFLAGS"
	T_LDFLAGS="$LDFLAGS"

	SRC_OBJS_DIR="$BASE_SRC_OBJS_DIR/$OBJS_SUBDIR"

	# All the data needed to compile a single target
	#  Make sure if you compile multiple targets to
	#  use multiple OBJS_DIR, because all in-between
	#  binaries are stored in there, and nowhere else.
	SRC_REPLACE="
		s@!!CC_HOST!!@$cc_host@g;
		s@!!CXX_HOST!!@$cxx_host@g;
		s@!!CC_BUILD!!@$cc_build@g;
		s@!!CXX_BUILD!!@$cxx_build@g;
		s@!!WINDRES!!@$windres@g;
		s@!!STRIP!!@$strip $strip_arg@g;
		s@!!LIPO!!@$lipo@g;
		s@!!CFLAGS!!@$T_CFLAGS@g;
		s@!!CFLAGS_BUILD!!@$CFLAGS_BUILD@g;
		s@!!CXXFLAGS!!@$T_CXXFLAGS@g;
		s@!!CXXFLAGS_BUILD!!@$CXXFLAGS_BUILD@g;
		s@!!STRGEN_FLAGS!!@$strgen_flags@g;
		s@!!LIBS!!@$LIBS@g;
		s@!!LDFLAGS!!@$T_LDFLAGS@g;
		s@!!LDFLAGS_BUILD!!@$LDFLAGS_BUILD@g;
		s@!!BIN_DIR!!@$BIN_DIR@g;
		s@!!ROOT_DIR!!@$ROOT_DIR@g;
		s@!!MEDIA_DIR!!@$MEDIA_DIR@g;
		s@!!SOURCE_LIST!!@$SOURCE_LIST@g;
		s@!!SRC_OBJS_DIR!!@$SRC_OBJS_DIR@g;
		s@!!LANG_OBJS_DIR!!@$LANG_OBJS_DIR@g;
		s@!!GRF_OBJS_DIR!!@$GRF_OBJS_DIR@g;
		s@!!SETTING_OBJS_DIR!!@$SETTING_OBJS_DIR@g;
		s@!!SRC_DIR!!@$SRC_DIR@g;
		s@!!SCRIPT_SRC_DIR!!@$SCRIPT_SRC_DIR@g;
		s@!!OSXAPP!!@$OSXAPP@g;
		s@!!LANG_DIR!!@$LANG_DIR@g;
		s@!!TTD!!@$TTD@g;
		s@!!BINARY_DIR!!@$prefix_dir/$binary_dir@g;
		s@!!DATA_DIR!!@$prefix_dir/$data_dir@g;
		s@!!DOC_DIR!!@$prefix_dir/$doc_dir@g;
		s@!!MAN_DIR!!@$prefix_dir/$man_dir@g;
		s@!!ICON_DIR!!@$prefix_dir/$icon_dir@g;
		s@!!ICON_THEME_DIR!!@$prefix_dir/$icon_theme_dir@g;
		s@!!PERSONAL_DIR!!@$personal_dir@g;
		s@!!SHARED_DIR!!@$shared_dir@g;
		s@!!INSTALL_DIR!!@$install_dir@g;
		s@!!BINARY_NAME!!@$binary_name@g;
		s@!!STRGEN!!@$STRGEN@g;
		s@!!DEPEND!!@$DEPEND@g;
		s@!!SETTINGSGEN!!@$SETTINGSGEN@g;
		s@!!STAGE!!@$STAGE@g;
		s@!!MAKEDEPEND!!@$makedepend@g;
		s@!!CFLAGS_MAKEDEP!!@$cflags_makedep@g;
		s@!!SORT!!@$sort@g;
		s@!!CONFIG_CACHE_COMPILER!!@config.cache.compiler@g;
		s@!!CONFIG_CACHE_LINKER!!@config.cache.linker@g;
		s@!!CONFIG_CACHE_SOURCE!!@config.cache.source@g;
		s@!!CONFIG_CACHE_VERSION!!@config.cache.version@g;
		s@!!CONFIG_CACHE_SOURCE_LIST!!@config.cache.source.list@g;
		s@!!CONFIG_CACHE_PWD!!@config.cache.pwd@g;
		s@!!CONFIG_CACHE_INVOCATION!!@config.cache.invocation@g;
		s@!!LANG_SUPPRESS!!@$lang_suppress@g;
		s@!!OBJS_C!!@$OBJS_C@g;
		s@!!OBJS_CPP!!@$OBJS_CPP@g;
		s@!!OBJS_MM!!@$OBJS_MM@g;
		s@!!OBJS_RC!!@$OBJS_RC@g;
		s@!!SRCS!!@$SRCS@g;
		s@!!OS!!@$os@g;
		s@!!CPU_TYPE!!@$cpu_type@g;
		s@!!CONFIGURE_FILES!!@$CONFIGURE_FILES@g;
		s@!!AWK!!@$awk@g;
		s@!!DISTCC!!@$distcc@g;
		s@!!NFORENUM!!@$nforenum@g;
		s@!!GRFCODEC!!@$grfcodec@g;
		s@!!CONFIGURE_INVOCATION!!@`echo "$CONFIGURE_INVOCATION" | sed 's!@!\\\\@!g;s!"!\\\\\\\\"!g'`@g;
	"

	if [ "$icon_theme_dir" != "" ]; then
		SRC_REPLACE="$SRC_REPLACE
			s@!!ICON_THEME_DIR!!@$prefix_dir/$icon_theme_dir@g;
		"
	else
		SRC_REPLACE="$SRC_REPLACE
			s@!!ICON_THEME_DIR!!@@g;
		"
	fi

	if [ "$man_dir" != "" ]; then
		SRC_REPLACE="$SRC_REPLACE
			s@!!MAN_DIR!!@$prefix_dir/$man_dir@g;
		"
	else
		SRC_REPLACE="$SRC_REPLACE
			s@!!MAN_DIR!!@@g;
		"
	fi

	if [ "$menu_dir" != "" ]; then
		SRC_REPLACE="$SRC_REPLACE
			s@!!MENU_DIR!!@$prefix_dir/$menu_dir@g;
		"
	else
		SRC_REPLACE="$SRC_REPLACE
			s@!!MENU_DIR!!@@g;
		"
	fi
}

generate_menu_item() {
	MENU_REPLACE="
		s@!!TTD!!@$TTD@g;
		s@!!MENU_GROUP!!@$menu_group@g;
		s@!!MENU_NAME!!@$menu_name@g
	"
	log 1 "Generating menu item..."
	mkdir -p media
	< $ROOT_DIR/media/openttd.desktop.in sed "$MENU_REPLACE" > media/openttd.desktop
}

generate_main() {
	STAGE="[MAIN]"

	make_sed

	# Create the main Makefile
	log 1 "Generating Makefile..."
	echo "# Auto-generated file from 'Makefile.in' -- DO NOT EDIT" > Makefile
	< $ROOT_DIR/Makefile.in sed "$SRC_REPLACE" >> Makefile
	cp $ROOT_DIR/Makefile.bundle.in Makefile.bundle
	echo "# Auto-generated file -- DO NOT EDIT" > Makefile.am
	echo >> Makefile.am
	# Make the copy of the source-list, so we don't trigger an unwanted recompile
	cp $SOURCE_LIST config.cache.source.list
	# Add the current directory, so we don't trigger an unwanted recompile
	echo "`pwd`" > config.cache.pwd
	# Make sure config.cache is OLDER then config.cache.source.list
	touch config.cache
	touch config.pwd

	if [ "$menu_dir" != "" ]; then
		generate_menu_item
	fi
}

generate_lang() {
	STAGE="[LANG]"

	make_sed

	# Create the language file
	mkdir -p $LANG_OBJS_DIR

	log 1 "Generating lang/Makefile..."
	echo "# Auto-generated file from 'Makefile.lang.in' -- DO NOT EDIT" > $LANG_OBJS_DIR/Makefile
	< $ROOT_DIR/Makefile.lang.in sed "$SRC_REPLACE" >> $LANG_OBJS_DIR/Makefile
	echo "DIRS += $LANG_OBJS_DIR" >> Makefile.am
	echo "LANG_DIRS += $LANG_OBJS_DIR" >> Makefile.am
}

generate_settings() {
	STAGE="[SETTING]"

	make_sed

	# Create the language file
	mkdir -p $SETTING_OBJS_DIR

	log 1 "Generating setting/Makefile..."
	echo "# Auto-generated file from 'Makefile.settings.in' -- DO NOT EDIT" > $SETTING_OBJS_DIR/Makefile
	< $ROOT_DIR/Makefile.setting.in sed "$SRC_REPLACE" >> $SETTING_OBJS_DIR/Makefile
	echo "DIRS += $SETTING_OBJS_DIR" >> Makefile.am
}

generate_grf() {
	STAGE="[BASESET]"

	make_sed

	# Create the language file
	mkdir -p $GRF_OBJS_DIR

	log 1 "Generating grf/Makefile..."
	echo "# Auto-generated file from 'Makefile.grf.in' -- DO NOT EDIT" > $GRF_OBJS_DIR/Makefile
	< $ROOT_DIR/Makefile.grf.in sed "$SRC_REPLACE" >> $GRF_OBJS_DIR/Makefile
	echo "DIRS += $GRF_OBJS_DIR" >> Makefile.am
}

generate_src_normal() {
	STAGE=$1

	make_sed

	# Create the source file
	mkdir -p $SRC_OBJS_DIR

	log 1 "Generating $2/Makefile..."
	echo "# Auto-generated file from 'Makefile.src.in' -- DO NOT EDIT" > $SRC_OBJS_DIR/Makefile
	< $ROOT_DIR/Makefile.src.in sed "$SRC_REPLACE" >> $SRC_OBJS_DIR/Makefile
	echo "DIRS += $SRC_OBJS_DIR" >> Makefile.am
	echo "SRC_DIRS += $SRC_OBJS_DIR" >> Makefile.am
}

generate_src_osx() {
	cc_host_orig="$cc_host"
	cxx_host_orig="$cxx_host"
	CFLAGS_orig="$CFLAGS"
	LDFLAGS_orig="$LDFLAGS"

	for type in $enable_universal; do

		if [ -n "$osx_sdk_104_path" ]; then
			# Use 10.4 SDK for 32-bit targets
			CFLAGS="-isysroot $osx_sdk_104_path $CFLAGS_orig"
			LDFLAGS="-Wl,-syslibroot,$osx_sdk_104_path $LDFLAGS_orig"
		fi

		# We don't want to duplicate the x86_64 stuff for each target, so do it once here
		if [ "$type" = "ppc64" ] || [ "$type" = "x86_64" ]; then
			# 64 bits is always 10.5 or higher. Furthermore it has a non const ICONV
			# and they also removed support for QuickTime/QuickDraw
			if [ -n "$osx_sdk_path" ]; then
				CFLAGS="-isysroot $osx_sdk_path $CFLAGS_orig"
				LDFLAGS="-Wl,-syslibroot,$osx_sdk_path $LDFLAGS_orig"
			fi
			CFLAGS="$CFLAGS -D_SQ64 -DNO_QUICKTIME -UENABLE_COCOA_QUICKDRAW"
			LIBS="`echo $LIBS | sed 's/-framework QuickTime//'`"
		fi

		case $type in
			ppc)
				BASE_SRC_OBJS_DIR="$OBJS_DIR/ppc"
				cc_host="$cc_host_orig -arch ppc -mmacosx-version-min=10.3"
				cxx_host="$cxx_host_orig -arch ppc -mmacosx-version-min=10.3"
				generate_src_normal "[ppc]" "objs/ppc";;
			ppc970)
				BASE_SRC_OBJS_DIR="$OBJS_DIR/ppc970"
				cc_host="$cc_host_orig -arch ppc970 -mmacosx-version-min=10.3 -mcpu=G5 -mpowerpc64 -mtune=970 -mcpu=970 -mpowerpc-gpopt"
				cxx_host="$cxx_host_orig -arch ppc970 -mmacosx-version-min=10.3 -mcpu=G5 -mpowerpc64 -mtune=970 -mcpu=970 -mpowerpc-gpopt"
				generate_src_normal "[ppc970]" "objs/ppc970";;
			i386)
				BASE_SRC_OBJS_DIR="$OBJS_DIR/i386"
				cc_host="$cc_host_orig -arch i386 -mmacosx-version-min=10.4"
				cxx_host="$cxx_host_orig -arch i386 -mmacosx-version-min=10.4"
				generate_src_normal "[i386]" "objs/i386";;
			ppc64)
				BASE_SRC_OBJS_DIR="$OBJS_DIR/ppc64"
				cc_host="$cc_host_orig -arch ppc64 -mmacosx-version-min=10.5"
				cxx_host="$cxx_host_orig -arch ppc64 -mmacosx-version-min=10.5"
				generate_src_normal "[ppc64]" "objs/ppc64";;
			x86_64)
				BASE_SRC_OBJS_DIR="$OBJS_DIR/x86_64"
				cc_host="$cc_host_orig -arch x86_64 -mmacosx-version-min=10.5"
				cxx_host="$cxx_host_orig -arch x86_64 -mmacosx-version-min=10.5"
				generate_src_normal "[x86_64]" "objs/x86_64";;
			*) log 1 "Unknown architecture requested for universal build: $type";;
		esac
	done
}

generate_src() {
	if [ "$os" = "OSX" ] && [ "$enable_universal" != "0" ]; then
		generate_src_osx
	else
		generate_src_normal "[SRC]" "objs"
	fi
}

showhelp() {
	echo "'configure' configures OpenTTD."
	echo ""
	echo "Usage: $0 [OPTION]... [VAR=VALUE]..."
	echo ""
	echo "To assign environment variables (e.g., CC, CFLAGS...), specify them as"
	echo "VAR=VALUE.  See below for descriptions of some of the useful variables."
	echo ""
	echo "Defaults for the options are specified in brackets."
	echo ""
	echo "Configuration:"
	echo "  -h, --help                     display this help and exit"
	echo ""
	echo "System types:"
	echo "  --build=BUILD                  configure for building on BUILD [guessed]"
	echo "  --host=HOST                    cross-compile to build programs to run"
	echo "                                 on HOST [BUILD]"
	echo "  --windres=WINDRES              the windres to use [HOST-windres]"
	echo "  --strip=STRIP                  the strip to use [HOST-strip]"
	echo "  --awk=AWK                      the awk to use in configure [awk]"
	echo "  --pkg-config=PKG-CONFIG        the pkg-config to use in configure [pkg-config]"
	echo "  --lipo=LIPO                    the lipo to use (OSX ONLY) [HOST-lipo]"
	echo "  --os=OS                        the OS we are compiling for [DETECT]"
	echo "                                 DETECT/UNIX/OSX/FREEBSD/DRAGONFLY/OPENBSD/"
	echo "                                 NETBSD/HPUX/SUNOS/CYGWIN/"
	echo "                                 MINGW/OS2/HAIKU"
	echo ""
	echo "Paths:"
	echo "  --prefix-dir=dir               specifies the prefix for all installed"
	echo "                                 files [/usr/local]"
	echo "  --binary-dir=dir               location of the binary. Will be prefixed"
	echo "                                 with the prefix-dir [games]"
	echo "  --data-dir=dir                 location of data files (lang, data, gm)."
	echo "                                 Will be prefixed with the prefix-dir"
	echo "                                 [share/games/openttd]"
	echo "  --doc-dir=dir                  location of the doc files"
	echo "                                 Will be prefixed with the prefix-dir"
	echo "                                 [$doc_dir]"
	echo "  --icon-dir=dir                 location of icons. Will be prefixed"
	echo "                                 with the prefix-dir [share/pixmaps]"
	echo "  --icon-theme-dir=dir           location of icon theme."
	echo "                                 Will be prefixed with the prefix-dir"
	echo "                                 and postfixed with size-dirs [$icon_theme_dir]"
	echo "  --man-dir=dir                  location of the manual page (UNIX only)"
	echo "                                 Will be prefixed with the prefix-dir"
	echo "                                 [$man_dir]"
	echo "  --menu-dir=dir                 location of the menu item. (UNIX only, except OSX)"
	echo "                                 Will be prefixed with the prefix-dir"
	echo "                                 [share/applications]"
	echo "  --personal-dir=dir             location of the personal directory"
	echo "                                 [os-dependent default]"
	echo "  --shared-dir=dir               location of shared data files"
	echo "                                 [os-dependent default]"
	echo "  --install-dir=dir              specifies the root to install to."
	echo "                                 Useful to install into jails [/]"
	echo "  --binary-name                  the name used for the binary, icons,"
	echo "                                 desktop file, etc. when installing [openttd]"
	echo ""
	echo "Features and packages:"
	echo "  --enable-debug[=LVL]           enable debug-mode (LVL=[0123], 0 is release)"
	echo "  --enable-desync-debug=[LVL]    enable desync debug options (LVL=[012], 0 is none"
	echo "  --enable-profiling             enables profiling"
	echo "  --enable-lto                   enables GCC's Link Time Optimization (LTO)/ICC's"
	echo "                                 Interprocedural Optimization if available"
	echo "  --enable-dedicated             compile a dedicated server (without video)"
	echo "  --enable-static                enable static compile (doesn't work for"
	echo "                                 all HOSTs)"
	echo "  --enable-translator            enable extra output for translators"
	echo "  --enable-universal[=ARCH]      enable universal builds (OSX ONLY). Allowed is any combination"
	echo "                                 of architectures: i386 ppc ppc970 ppc64 x86_64"
	echo "                                 Default architectures are: i386 ppc"
	echo "  --enable-osx-g5                enables optimizations for ppc970 (G5) (OSX ONLY)"
	echo "  --disable-cocoa-quartz         disable the quartz window mode driver for Cocoa (OSX ONLY)"
	echo "  --disable-cocoa-quickdraw      disable the quickdraw window mode driver for Cocoa (OSX ONLY)"
	echo "  --disable-unicode              disable unicode support to build win9x"
	echo "                                 version (Win32 ONLY)"
	echo "  --enable-console               compile as a console application instead of as a GUI application."
	echo "                                 If this setting is active, debug output will appear in the same"
	echo "                                 console instead of opening a new window. (Win32 ONLY)"
	echo "  --disable-assert               disable asserts (continue on errors)"
	echo "  --enable-strip                 enable any possible stripping"
	echo "  --without-osx-sysroot          disable the automatic adding of sysroot "
	echo "                                 (OSX ONLY)"
	echo "  --without-application-bundle   disable generation of application bundle"
	echo "                                 (OSX ONLY)"
	echo "  --without-menu-entry           Don't generate a menu item (Freedesktop based only)"
	echo "  --menu-group=group             Category in which the menu item will be placed (Freedesktop based only)"
	echo "  --menu-name=name               Name of the menu item when placed [OpenTTD]"
	echo "  --with-direct-music            enable direct music support (Win32 ONLY)"
	echo "  --with-sort=sort               define a non-default location for sort"
	echo "  --with-midi=midi               define which midi-player to use"
	echo "  --with-midi-arg=arg            define which args to use for the"
	echo "                                 midi-player"
	echo "  --with-fluidsynth              enables fluidsynth support"
	echo "  --with-allegro[=\"pkg-config allegro\"]"
	echo "                                 enables Allegro video driver support"
	echo "  --with-cocoa                   enables COCOA video driver (OSX ONLY)"
	echo "  --with-sdl[=\"sdl1|sdl2\"]       enables SDL video driver support"
	echo "  --with-zlib[=\"pkg-config zlib\"]"
	echo "                                 enables zlib support"
	echo "  --with-liblzma[=\"pkg-config liblzma\"]"
	echo "                                 enables liblzma support"
	echo "  --with-liblzo2[=liblzo2.a]     enables liblzo2 support"
	echo "  --with-png[=\"pkg-config libpng\"]"
	echo "                                 enables libpng support"
	echo "  --with-freetype[=\"pkg-config freetype2\"]"
	echo "                                 enables libfreetype support"
	echo "  --with-fontconfig[=\"pkg-config fontconfig\"]"
	echo "                                 enables fontconfig support"
	echo "  --with-xdg-basedir[=\"pkg-config libxdg-basedir\"]"
	echo "                                 enables XDG base directory support"
	echo "  --with-icu                     enables icu components for layout and sorting"
	echo "  --with-icu-layout[=\"pkg-config icu-lx\"]"
	echo "                                 enables icu components for layouting (right-to-left support)"
	echo "  --with-icu-sort[=\"pkg-config icu-i18n\"]"
	echo "                                 enables icu components for locale specific string sorting"
	echo "  --static-icu                   try to link statically (libsicu instead of"
	echo "                                 libicu; can fail as the new name is guessed)"
	echo "  --with-iconv[=iconv-path]      enables iconv support"
	echo "  --disable-builtin-depend       disable use of builtin deps finder"
	echo "  --with-makedepend[=makedepend] enables makedepend support"
	echo "  --with-ccache                  enables ccache support"
	echo "  --with-distcc                  enables distcc support"
	echo "  --without-grfcodec             disable usage of grfcodec and re-generation of base sets"
	echo "  --without-threads              disable threading support"
	echo "  --without-sse                  disable SSE support (x86/x86_64 only)"
	echo "  --without-libbfd               disable libbfd support, used for improved crash logs (MinGW and Unix/glibc only)"
	echo "  --without-bfd-extra-debug      disable extra debugging information when using libbfd (MinGW and Unix/glibc only)"
	echo "  --without-self-gdb-debug       disable improved crash logs using gdb (Linux only)"
	echo "  --without-self-lldb-debug      disable improved crash logs using lldb (OSX only)"
	echo ""
	echo "Some influential environment variables:"
	echo "  CC                             C compiler command"
	echo "  CXX                            C++ compiler command"
	echo "  CFLAGS                         C compiler flags"
	echo "  CXXFLAGS                       C++ compiler flags"
	echo "  WINDRES                        windres command"
	echo "  LDFLAGS                        linker flags, e.g. -L<lib dir> if you"
	echo "                                 have libraries in a nonstandard"
	echo "                                 directory <lib dir>"
	echo "  CFLAGS_BUILD                   C compiler flags for build time tool generation"
	echo "  CXXFLAGS_BUILD                 C++ compiler flags for build time tool generation"
	echo "  LDFLAGS_BUILD                  linker flags for build time tool generation"
	echo "  PKG_CONFIG_PATH                additional library search paths (see \"man pkg-config\")"
	echo "  PKG_CONFIG_LIBDIR              replace the default library search path (see \"man pkg-config\")"
	echo ""
	echo "Use these variables to override the choices made by 'configure' or to help"
	echo "it to find libraries and programs with nonstandard names/locations."
}