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dnl Copyright (c) 2015, Suresh Sundriyal
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dnl All rights reserved.
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dnl Redistribution and use in source and binary forms, with or without
dnl modification, are permitted provided that the following conditions are met:
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dnl dnl Redistributions of source code must retain the above copyright notice, this
dnl list of conditions and the following disclaimer.
dnl dnl Redistributions in binary form must reproduce the above copyright notice,
dnl this list of conditions and the following disclaimer in the documentation
dnl and/or other materials provided with the distribution.
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dnl may be used to endorse or promote products derived from this software
dnl without specific prior written permission.
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dnl THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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dnl LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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dnl
dnl @file lnav_with_yajl.m4
AC_DEFUN([LNAV_WITH_LOCAL_YAJL],
    [
    AC_ARG_WITH([yajl],
        AC_HELP_STRING(
            [--with-yajl=DIR],
            [use a local installed version of yajl]
        ),
        [
        AS_IF([test "$withval" != "no"],
            [
            AS_CASE(["$withval"],
                [yes],
                [AC_MSG_NOTICE([Checking for yajl libs])],
                [
                AS_VAR_SET([yajl_saved_ldflags], ["$LDFLAGS"])
                AS_VAR_SET([yajl_saved_cppflags], ["$CPPFLAGS"])
                AS_VAR_SET([yajl_saved_libtool_link_flags],
                    ["$LIBTOOL_LIBK_FLAGS"]
                )

                LNAV_ADDTO(CPPFLAGS, ["-I$withval/include"])
                LNAV_ADDTO(LDFLAGS, ["-I$withval/lib"])
                LNAV_ADDTO(LIBTOOL_LINK_FLAGS, ["-R$withval/lib"])

                AC_MSG_NOTICE([Checking for yajl libs in $withval])
                ]
            )

            AC_SEARCH_LIBS([yajl_gen_alloc],
                [yajl],
                [
                AC_MSG_NOTICE([Checking for yajl headers])
                AC_CHECK_HEADERS([yajl/yajl_parse.h],
                    [
                    AS_VAR_SET([HAVE_LOCAL_YAJL], [1])
                    LNAV_ADDTO(LIBS, [-lyajl])
                    ],
                    [AC_MSG_WARN([yajl not found on the local system])]
                )
                ]
            )
            ]
        )
        ]
    )

    AS_VAR_SET_IF([HAVE_LOCAL_YAJL],
        [],
        [
        AC_MSG_NOTICE([compiling with the included version of yajl])
        AS_VAR_SET([HAVE_LOCAL_YAJL], [0])
        AS_VAR_SET_IF([yajl_saved_ldflags],
            [
            AS_VAR_SET([CPPFLAGS], ["$yajl_saved_cppflags"])
            AS_VAR_SET([LDFLAGS], ["$yajl_saved_ldflags"])
            AS_VAR_SET([LIBTOOL_LIBK_FLAGS], ["$yajl_saved_libtool_link_flags"])
            ]
        )
        ]
    )

    AC_SUBST(HAVE_LOCAL_YAJL)
    ]
)dnl