# Configure paths for libogg

# updated by Karl Heyes 10-Jun-2003

# Jack Moffitt <jack@icecast.org> 10-21-2000

# Shamelessly stolen from Owen Taylor and Manish Singh

dnl XIPH_PATH_OGG([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])

dnl Test for libogg, and define OGG_CFLAGS OGG_LDFLAGS and OGG_LIBS

dnl

AC_DEFUN([XIPH_PATH_OGG],

[dnl 

AC_ARG_VAR([OGG_PREFIX],[path to ogg installation])

AC_ARG_WITH(ogg,

    [AC_HELP_STRING([--with-ogg=PREFIX],

        [Prefix where libogg is installed (optional)])],

    ogg_prefix="$withval",

    ogg_prefix="$OGG_PREFIX"

    )

if test "x$ogg_prefix" = "x" -o "x$ogg_prefix" = "xyes"; then

    if test "x$prefix" = "xNONE"; then

        ogg_prefix=/usr/local

    else

        ogg_prefix="$prefix"

    fi

fi

XIPH_GCC_WARNING([-I$ogg_prefix/include],,

    [ OGG_CFLAGS="-I$ogg_prefix/include"

      OGG_LDFLAGS="-L$ogg_prefix/lib"

      ])

AC_CACHE_CHECK([for libogg], xt_cv_lib_ogg,

[dnl

OGG_LIBS="-logg"

#

# check if the installed Ogg is sufficiently new.

#

ac_save_CFLAGS="$CFLAGS"

ac_save_LIBS="$LIBS"

ac_save_LDFLAGS="$LDFLAGS"

CFLAGS="$CFLAGS $OGG_CFLAGS"

LIBS="$LIBS $OGG_LIBS"

LDFLAGS="$LDFLAGS $OGG_LDFLAGS"

AC_TRY_LINK_FUNC(ogg_sync_init,

    [ xt_cv_lib_ogg=ok ],

    [ AC_TRY_LINK([#include <ogg/ogg.h>],, 

        [ xt_cv_lib_ogg="pre v1.0, needs updating" ],

        [ xt_cv_lib_ogg="not found" ])

    ])

CFLAGS="$ac_save_CFLAGS"

LDFLAGS="$ac_save_LDFLAGS"

LIBS="$ac_save_LIBS"

])

if test "x$xt_cv_lib_ogg" = "xok"; then

    ifelse([$1],,,[$1])

    AC_DEFINE([HAVE_OGG], [1], [Define if you have libogg installed])

else

    OGG_LIBS=""

    OGG_CFLAGS=""

    OGG_LDFLAGS=""

    ifelse([$2],,,[$2])

fi

AC_SUBST(OGG_LIBS)

AC_SUBST(OGG_CFLAGS)

AC_SUBST(OGG_LDFLAGS)

])