dnl XIPH_PATH_SHOUT
dnl Jack Moffitt <jack@icecast.org> 08-06-2001
dnl Rewritten for libshout 2
dnl Brendan Cully <brendan@xiph.org> 20030612
dnl 
dnl $Id: shout.m4 7180 2004-07-20 02:50:54Z brendan $

# XIPH_PATH_SHOUT([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
# Test for libshout, and define SHOUT_CPPFLAGS SHOUT_CFLAGS SHOUT_LIBS, and
# SHOUT_THREADSAFE
AC_DEFUN([XIPH_PATH_SHOUT],
[dnl
xt_have_shout="no"
SHOUT_THREADSAFE="no"
SHOUT_CPPFLAGS=""
SHOUT_CFLAGS=""
SHOUT_LIBS=""

# NB: PKG_CHECK_MODULES exits if pkg-config is unavailable on the target
# system, so we can't use it.

# seed pkg-config with the default libshout location
PKG_CONFIG_PATH=${PKG_CONFIG_PATH:-/usr/local/lib/pkgconfig}
export PKG_CONFIG_PATH

# Step 1: Use pkg-config if available
AC_PATH_PROG([PKGCONFIG], [pkg-config], [no])
if test "$PKGCONFIG" != "no" && `$PKGCONFIG --exists shout`
then
  SHOUT_CFLAGS=`$PKGCONFIG --variable=cflags_only shout`
  SHOUT_CPPFLAGS=`$PKGCONFIG --variable=cppflags shout`
  SHOUT_LIBS=`$PKGCONFIG --libs shout`
  xt_have_shout="maybe"
else
  if test "$PKGCONFIG" != "no"
  then
    AC_MSG_NOTICE([$PKGCONFIG couldn't find libshout. Try adjusting PKG_CONFIG_PATH.])
  fi
  # pkg-config unavailable, try shout-config
  AC_PATH_PROG([SHOUTCONFIG], [shout-config], [no])
  if test "$SHOUTCONFIG" != "no" && test `$SHOUTCONFIG --package` = "libshout"
  then
    SHOUT_CPPFLAGS=`$SHOUTCONFIG --cppflags`
    SHOUT_CFLAGS=`$SHOUTCONFIG --cflags-only`
    SHOUT_LIBS=`$SHOUTCONFIG --libs`
    xt_have_shout="maybe"
  fi
fi

dnl XXX - Up until and including speex-1.2beta1, '-lm' has been missing from
dnl       --libs in speex.pc, even though Speex (still) depends on it. This is
dnl       a problem for Solaris' linker and at least some static archs using
dnl       GNU ld. '-lm' now comes from the libshout's libvorbis dependency and
dnl       is in the wrong place, if libshout was built with Speex support. Just
dnl       move libm to the end for now.
xt_shout_TEMP="`echo $SHOUT_LIBS | sed -e 's,-lm,,g'`"
SHOUT_LIBS="$xt_shout_TEMP -lm"

# Now try actually using libshout
if test "$xt_have_shout" != "no"
then
  ac_save_CPPFLAGS="$CPPFLAGS"
  ac_save_CFLAGS="$CFLAGS"
  ac_save_LIBS="$LIBS"
  CPPFLAGS="$CPPFLAGS $SHOUT_CPPFLAGS"
  CFLAGS="$CFLAGS $SHOUT_CFLAGS"
  LIBS="$SHOUT_LIBS $LIBS"
  AC_CHECK_HEADERS([shout/shout.h], [
    AC_CHECK_FUNC([shout_new], [
      ifelse([$1], , :, [$1])
      xt_have_shout="yes"
    ])
    AC_EGREP_CPP([yes], [#include <shout/shout.h>
#if SHOUT_THREADSAFE
yes
#endif
], [SHOUT_THREADSAFE="yes"])
  ])
  CPPFLAGS="$ac_save_CPPFLAGS"
  CFLAGS="$ac_save_CFLAGS"
  LIBS="$ac_save_LIBS"
fi

if test "$xt_have_shout" != "yes"
then
  ifelse([$2], , :, [$2])
fi
])dnl XIPH_PATH_SHOUT