dnl $Id$

dnl Process this file with autoconf to produce a configure script.
AC_INIT(echoping.h)
AC_CANONICAL_HOST
AM_INIT_AUTOMAKE(echoping, 5.0-BETA)
AM_CONFIG_HEADER(config.h)

dnl User options
AC_ARG_ENABLE(http,
 [--enable-http   HTTP (Web's main protocol) support],dnl
 [if test "$enableval" = "yes"; then
 AC_DEFINE(HTTP)
 HTTP=1
 fi],
 dnl Default: enable it
 [AC_DEFINE(HTTP)
  HTTP=1])
AC_ARG_ENABLE(icp,
 [--enable-icp   ICP (for testing Web proxies/caches) support],dnl
 [if test "$enableval" = "yes"; then
 AC_DEFINE(ICP)
 ICP=1
 fi])
AC_ARG_ENABLE(smtp,
 [--enable-smtp   SMTP (Mail's main protocol) support],dnl
 [if test "$enableval" = "yes"; then
 AC_DEFINE(SMTP)
 SMTP=1
 fi],
 dnl Default: enable it
 [AC_DEFINE(SMTP)
  SMTP=1])
AC_ARG_WITH(ssl,
 [--with-ssl[=DIR]   SSL crypt support (needs OpenSSL)],dnl
 [if test "$withval" != "no"; then
   AC_DEFINE(OPENSSL)
   OPENSSL=1
   if test "$withval" != "yes"; then
	SSLROOT=$withval
	LDFLAGS="${LDFLAGS} -L$SSLROOT/lib"
        CPPFLAGS="${CPPFLAGS} -I$SSLROOT/include"  
   fi
 fi],
 dnl Default: disable it
)

dnl See T/TCP later 

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL

dnl Checks for libraries.

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(sys/time.h unistd.h)
CF_SYS_ERRLIST

case $host_os in
osf*)
	# Stupid bug appeared in Tru64-OSF1 v5. socklen_t is undefined without
	# the following workaround. 
        CPPFLAGS="$CPPFLAGS -D_POSIX_PII_SOCKET"
        ;;
esac

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_HEADER_TIME

dnl Checks for library functions.
CF_LIB_SOCKET
CF_LIB_NSL
CF_LIB_MATH
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(getnameinfo inet_ntop, , AC_MSG_ERROR(Missing mandatory function - echoping now uses the new network functions which are mandatory for IPv6))
# Tru64 UNIX has getaddrinfo() but has it renamed in libc as
# something else so we must include <netdb.h> to get the
# redefinition. (Stolen from rsync)
AC_CHECK_FUNCS(getaddrinfo, ,
	[AC_MSG_CHECKING([for getaddrinfo by including <netdb.h>])
	AC_TRY_LINK([#include <sys/types.h>
	#include <sys/socket.h>
	#include <netdb.h>],[getaddrinfo(NULL, NULL, NULL, NULL);],
		[AC_MSG_RESULT([yes])
		AC_DEFINE(HAVE_GETADDRINFO, 1,
			[Define if you have the `getaddrinfo' function.])],
		[AC_MSG_RESULT([no])
		])])
AC_CHECK_FUNCS(gettimeofday socket sigaction, , AC_MSG_ERROR(Missing mandatory function))
AC_CHECK_FUNCS(usleep)

if test "$OPENSSL" = "1"; then
CF_LIB_OPENSSL
fi

dnl T/TCP
AC_MSG_CHECKING([T/TCP])
AC_TRY_COMPILE(
 [#include <sys/types.h>
  #include <sys/socket.h>
 ],
 [int foobar = MSG_EOF;],
 [AC_DEFINE(TTCP)
  ac_have_ttcp="yes"],
 ac_have_ttcp=no)
AC_MSG_RESULT($ac_have_ttcp)
AC_ARG_ENABLE(ttcp,
 [--enable-ttcp   T/TCP (Transaction TCP) support],
 [if test "$enableval" = "yes"; then
   if test $ac_have_ttcp = "yes"; then
     AC_DEFINE(HAVE_TTCP)
     TTCP=1
   else
     AC_MSG_WARN([No T/TCP support on this system, request ignored])
   fi
  fi],
 dnl Default: enable it if supported
 if test $ac_have_ttcp = "yes"; then
   AC_DEFINE(HAVE_TTCP)
   TTCP=1
 fi)

dnl Type Of Service
AC_MSG_CHECKING([Type Of Service])
AC_TRY_COMPILE(
 [#include <sys/types.h>
  #include <netinet/in.h>
 ],
 [int foobar = IP_TOS;],
 [AC_DEFINE(HAVE_TOS)
  ac_have_tos="yes"],
 ac_have_tos="no")
AC_MSG_RESULT($ac_have_tos)
AC_ARG_ENABLE(tos,
 [--enable-tos   TOS (Type Of Service) support],
 [if test "$enableval" = "yes"; then
   if test $ac_have_tos = "yes"; then
     AC_DEFINE(HAVE_TOS)
     TOS=1
   else
     AC_MSG_WARN([No TOS support on this system, request ignored])
   fi
  fi],
 dnl Default: enable it if supported
 if test $ac_have_tos = "yes"; then
   AC_DEFINE(HAVE_TOS)
   TOS=1
 fi)

dnl Socket priority
dnl Linux only, it seems. Anyone knows a standard way to do so?
AC_MSG_CHECKING([Socket priority])
AC_TRY_COMPILE(
 [#include <sys/types.h>
  #include <sys/socket.h>
 ],
 [int foobar = SO_PRIORITY;],
 [AC_DEFINE(HAVE_SOCKET_PRIORITY)
  ac_have_priority="yes"],
 ac_have_priority="no")
AC_MSG_RESULT($ac_have_priority)
AC_ARG_ENABLE(priority,
 [--enable-priority   PRIORITY (socket priority) support],
 [if test "$enableval" = "yes"; then
   if test $ac_have_priority = "yes"; then
     AC_DEFINE(HAVE_SOCKET_PRIORITY)
     PRIORITY=1
   else
     AC_MSG_WARN([No socket priority support on this system, request ignored])
   fi
  fi],
 dnl Default: enable it if supported
 if test $ac_have_priority = "yes"; then
   AC_DEFINE(HAVE_SOCKET_PRIORITY)
   PRIORITY=1
 fi)

if test "$GCC" = yes; then
        CFLAGS="$CFLAGS -Wall"
fi

AC_OUTPUT(Makefile)

AC_DEFUN([DISPLAY_SETTING],
[
AC_MSG_CHECKING($1)
if [ eval 'test "$$1" = "1"' > /dev/null]; then
	AC_MSG_RESULT( enabled)
else 
	AC_MSG_RESULT( disabled)
fi
])dnl
echo ""
echo "Configuration of echoping:"

DISPLAY_SETTING(HTTP)
DISPLAY_SETTING(ICP)
DISPLAY_SETTING(OPENSSL)
DISPLAY_SETTING(SMTP)
DISPLAY_SETTING(TTCP)
DISPLAY_SETTING(TOS)
DISPLAY_SETTING(PRIORITY)