# Configure paths for libopus

# Gregory Maxwell <greg@xiph.org> 08-30-2012

# Shamelessly stolen from Jack Moffitt (libogg) who

# Shamelessly stole from Owen Taylor and Manish Singh

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

dnl Test for libopus, and define OPUS_CFLAGS and OPUS_LIBS

dnl

AC_DEFUN([XIPH_PATH_OPUS],

[dnl

dnl Get the cflags and libraries

dnl

AC_ARG_WITH(opus,AC_HELP_STRING([--with-opus=PFX],[Prefix where opus is installed (optional)]), opus_prefix="$withval", opus_prefix="")

AC_ARG_WITH(opus-libraries,AC_HELP_STRING([--with-opus-libraries=DIR],[Directory where the opus library is installed (optional)]), opus_libraries="$withval", opus_libraries="")

AC_ARG_WITH(opus-includes,AC_HELP_STRING([--with-opus-includes=DIR],[Directory where the opus header files are installed (optional)]), opus_includes="$withval", opus_includes="")

AC_ARG_ENABLE(opustest,AC_HELP_STRING([--disable-opustest],[Do not try to compile and run a test opus program]),, enable_opustest=yes)

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

OPUS_LIBS="-L$opus_libraries"

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

OPUS_LIBS=""

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

OPUS_LIBS="-L$opus_prefix/lib"

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

OPUS_LIBS="-L$prefix/lib"

fi

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

OPUS_LIBS="$OPUS_LIBS -lopus"

fi

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

OPUS_CFLAGS="-I$opus_includes"

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

OPUS_CFLAGS=""

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

OPUS_CFLAGS="-I$opus_prefix/include"

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

OPUS_CFLAGS="-I$prefix/include"

fi

AC_MSG_CHECKING(for Opus)

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

no_opus="disabled"

enable_opustest="no"

else

no_opus=""

fi

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

ac_save_CFLAGS="$CFLAGS"

ac_save_LIBS="$LIBS"

CFLAGS="$CFLAGS $OPUS_CFLAGS"

LIBS="$LIBS $OPUS_LIBS"

dnl

dnl Now check if the installed Opus is sufficiently new.

dnl

rm -f conf.opustest

AC_TRY_RUN([

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <opus.h>

int main (void)

{

system("touch conf.opustest");

return 0;

}

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

CFLAGS="$ac_save_CFLAGS"

LIBS="$ac_save_LIBS"

fi

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

AC_MSG_RESULT(no)

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

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

AC_MSG_RESULT(yes)

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

else

AC_MSG_RESULT(no)

if test -f conf.opustest ; then

:

else

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

CFLAGS="$CFLAGS $OPUS_CFLAGS"

LIBS="$LIBS $OPUS_LIBS"

AC_TRY_LINK([

#include <stdio.h>

#include <opus.h>

], [ return 0; ],

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

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

echo "*** version of Opus. If it is not finding Opus, 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 occurred. This usually means Opus was incorrectly installed"

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

CFLAGS="$ac_save_CFLAGS"

LIBS="$ac_save_LIBS"

fi

OPUS_CFLAGS=""

OPUS_LIBS=""

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

fi

AC_SUBST(OPUS_CFLAGS)

AC_SUBST(OPUS_LIBS)

rm -f conf.opustest

])