# Configure paths for libogg

# 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 and OGG_LIBS

dnl

AC_DEFUN([XIPH_PATH_OGG],

[dnl 

dnl Get the cflags and libraries

dnl

AC_ARG_WITH(ogg,AC_HELP_STRING([--with-ogg=PFX],[Prefix where libogg is installed (optional)]), ogg_prefix="$withval", ogg_prefix="")

AC_ARG_WITH(ogg-libraries,AC_HELP_STRING([--with-ogg-libraries=DIR],[Directory where libogg library is installed (optional)]), ogg_libraries="$withval", ogg_libraries="")

AC_ARG_WITH(ogg-includes,AC_HELP_STRING([--with-ogg-includes=DIR],[Directory where libogg header files are installed (optional)]), ogg_includes="$withval", ogg_includes="")

AC_ARG_ENABLE(oggtest,AC_HELP_STRING([--disable-oggtest],[Do not try to compile and run a test Ogg program]),, enable_oggtest=yes)

  if test "x$ogg_libraries" != "x" ; then

    OGG_LIBS="-L$ogg_libraries"

  elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then

    OGG_LIBS=""

  elif test "x$ogg_prefix" != "x" ; then

    OGG_LIBS="-L$ogg_prefix/lib"

  elif test "x$prefix" != "xNONE" ; then

    OGG_LIBS="-L$prefix/lib"

  fi

  if test "x$ogg_prefix" != "xno" ; then

    OGG_LIBS="$OGG_LIBS -logg"

  fi

  if test "x$ogg_includes" != "x" ; then

    OGG_CFLAGS="-I$ogg_includes"

  elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then

    OGG_CFLAGS=""

  elif test "x$ogg_prefix" != "x" ; then

    OGG_CFLAGS="-I$ogg_prefix/include"

  elif test "x$prefix" != "xNONE"; then

    OGG_CFLAGS="-I$prefix/include"

  fi

  AC_MSG_CHECKING(for Ogg)

  if test "x$ogg_prefix" = "xno" ; then

    no_ogg="disabled"

    enable_oggtest="no"

  else

    no_ogg=""

  fi

  if test "x$enable_oggtest" = "xyes" ; then

    ac_save_CFLAGS="$CFLAGS"

    ac_save_LIBS="$LIBS"

    CFLAGS="$CFLAGS $OGG_CFLAGS"

    LIBS="$LIBS $OGG_LIBS"

dnl

dnl Now check if the installed Ogg is sufficiently new.

dnl

      rm -f conf.oggtest

      AC_TRY_RUN([

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ogg/ogg.h>

int main ()

{

  system("touch conf.oggtest");

  return 0;

}

],, no_ogg=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])

       CFLAGS="$ac_save_CFLAGS"

       LIBS="$ac_save_LIBS"

  fi

  if test "x$no_ogg" = "xdisabled" ; then

     AC_MSG_RESULT(no)

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

  elif test "x$no_ogg" = "x" ; then

     AC_MSG_RESULT(yes)

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

  else

     AC_MSG_RESULT(no)

     if test -f conf.oggtest ; then

       :

     else

       echo "*** Could not run Ogg test program, checking why..."

       CFLAGS="$CFLAGS $OGG_CFLAGS"

       LIBS="$LIBS $OGG_LIBS"

       AC_TRY_LINK([

#include <stdio.h>

#include <ogg/ogg.h>

],     [ return 0; ],

       [ echo "*** The test program compiled, but did not run. This usually means"

       echo "*** that the run-time linker is not finding Ogg or finding the wrong"

       echo "*** version of Ogg. If it is not finding Ogg, you'll need to set your"

       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"

       echo "*** to the installed location  Also, make sure you have run ldconfig if that"

       echo "*** is required on your system"

       echo "***"

       echo "*** If you have an old version installed, it is best to remove it, although"

       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],

       [ echo "*** The test program failed to compile or link. See the file config.log for the"

       echo "*** exact error that occured. This usually means Ogg was incorrectly installed"

       echo "*** or that you have moved Ogg since it was installed." ])

       CFLAGS="$ac_save_CFLAGS"

       LIBS="$ac_save_LIBS"

     fi

     OGG_CFLAGS=""

     OGG_LIBS=""

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

  fi

  AC_SUBST(OGG_CFLAGS)

  AC_SUBST(OGG_LIBS)

  rm -f conf.oggtest

])