1 files changed, 112 insertions, 0 deletions
diff --git a/m4/ao.m4 b/m4/ao.m4
new file mode 100644
index 000000000..a2bfa67de
--- /dev/null
+++ b/m4/ao.m4
@@ -0,0 +1,112 @@
+# ao.m4
+# Configure paths for libao
+# Jack Moffitt <jack@icecast.org> 10-21-2000
+# Shamelessly stolen from Owen Taylor and Manish Singh
+
+dnl XIPH_PATH_AO([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Test for libao, and define AO_CFLAGS and AO_LIBS
+dnl
+AC_DEFUN(XIPH_PATH_AO,
+[dnl 
+dnl Get the cflags and libraries
+dnl
+AC_ARG_WITH(ao,[  --with-ao=PFX   Prefix where libao is installed (optional)], ao_prefix="$withval", ao_prefix="")
+AC_ARG_WITH(ao-libraries,[  --with-ao-libraries=DIR   Directory where libao library is installed (optional)], ao_libraries="$withval", ao_libraries="")
+AC_ARG_WITH(ao-includes,[  --with-ao-includes=DIR   Directory where libao header files are installed (optional)], ao_includes="$withval", ao_includes="")
+AC_ARG_ENABLE(aotest, [  --disable-aotest       Do not try to compile and run a test ao program],, enable_aotest=yes)
+
+
+  if test "x$ao_libraries" != "x" ; then
+    AO_LIBS="-L$ao_libraries"
+  elif test "x$ao_prefix" != "x"; then
+    AO_LIBS="-L$ao_prefix/lib"
+  elif test "x$prefix" != "xNONE"; then
+    AO_LIBS="-L$prefix/lib"
+  fi
+
+  if test "x$ao_includes" != "x" ; then
+    AO_CFLAGS="-I$ao_includes"
+  elif test "x$ao_prefix" != "x"; then
+    AO_CFLAGS="-I$ao_prefix/include"
+  elif test "x$prefix" != "xNONE"; then
+    AO_CFLAGS="-I$prefix/include"
+  fi
+
+  # see where dl* and friends live
+  AC_CHECK_FUNCS(dlopen, [AO_DL_LIBS=""], [
+    AC_CHECK_LIB(dl, dlopen, [AO_DL_LIBS="-ldl"], [
+      AC_MSG_WARN([could not find dlopen() needed by libao sound drivers
+      your system may not be supported.])
+    ])
+  ])
+
+  AO_LIBS="$AO_LIBS -lao $AO_DL_LIBS"
+
+  AC_MSG_CHECKING(for ao)
+  no_ao=""
+
+
+  if test "x$enable_aotest" = "xyes" ; then
+    ac_save_CFLAGS="$CFLAGS"
+    ac_save_LIBS="$LIBS"
+    CFLAGS="$CFLAGS $AO_CFLAGS"
+    LIBS="$LIBS $AO_LIBS"
+dnl
+dnl Now check if the installed ao is sufficiently new.
+dnl
+      rm -f conf.aotest
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ao/ao.h>
+
+int main ()
+{
+  system("touch conf.aotest");
+  return 0;
+}
+
+],, no_ao=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+  fi
+
+  if test "x$no_ao" = "x" ; then
+     AC_MSG_RESULT(yes)
+     ifelse([$1], , :, [$1])     
+  else
+     AC_MSG_RESULT(no)
+     if test -f conf.aotest ; then
+       :
+     else
+       echo "*** Could not run ao test program, checking why..."
+       CFLAGS="$CFLAGS $AO_CFLAGS"
+       LIBS="$LIBS $AO_LIBS"
+       AC_TRY_LINK([
+#include <stdio.h>
+#include <ao/ao.h>
+],     [ return 0; ],
+       [ echo "*** The test program compiled, but did not run. This usually means"
+       echo "*** that the run-time linker is not finding ao or finding the wrong"
+       echo "*** version of ao. If it is not finding ao, you'll need to set your"
+       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+       echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+       echo "*** is required on your system"
+       echo "***"
+       echo "*** If you have an old version installed, it is best to remove it, although"
+       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
+       [ echo "*** The test program failed to compile or link. See the file config.log for the"
+       echo "*** exact error that occured. This usually means ao was incorrectly installed"
+       echo "*** or that you have moved ao since it was installed." ])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+     AO_CFLAGS=""
+     AO_LIBS=""
+     ifelse([$2], , :, [$2])
+  fi
+  AC_SUBST(AO_CFLAGS)
+  AC_SUBST(AO_LIBS)
+  rm -f conf.aotest
+])