correct a condition in check-libheader.m4 remove gst a52 and mpeg2dec m4's in favor of ones i have sent to walken for...

Original commit message from CVS:
* correct a condition in check-libheader.m4
* remove gst a52 and mpeg2dec m4's in favor of ones i have sent to
walken for inclusion in the upstream packages

1 files changed, 76 insertions, 0 deletions

diff --git a/m4/mpeg2dec.m4 b/m4/mpeg2dec.m4
new file mode 100644
index 00000000..f5a4e85c
--- /dev/null
+++ b/m4/mpeg2dec.m4
@@ -0,0 +1,76 @@
+dnl
+dnl MPEG2DEC_CHECK-LIBHEADER(FEATURE-NAME, LIB-NAME, LIB-FUNCTION, HEADER-NAME,
+dnl                          ACTION-IF-FOUND, ACTION-IF-NOT-FOUND,
+dnl                          EXTRA-LDFLAGS, EXTRA-CPPFLAGS)
+dnl
+dnl FEATURE-NAME        - feature name; library and header files are treated
+dnl                       as feature, which we look for
+dnl LIB-NAME            - library name as in AC_CHECK_LIB macro
+dnl LIB-FUNCTION        - library symbol as in AC_CHECK_LIB macro
+dnl HEADER-NAME         - header file name as in AC_CHECK_HEADER
+dnl ACTION-IF-FOUND     - when feature is found then execute given action
+dnl ACTION-IF-NOT-FOUND - when feature is not found then execute given action
+dnl EXTRA-LDFLAGS       - extra linker flags (-L or -l)
+dnl EXTRA-CPPFLAGS      - extra C preprocessor flags, i.e. -I/usr/X11R6/include
+dnl
+dnl Based on GST_CHECK_LIBHEADER from gstreamer plugins 0.3.1.
+dnl
+AC_DEFUN(MPEG2DEC_CHECK_LIBHEADER,
+[
+  AC_CHECK_LIB([$2], [$3], HAVE_[$1]=yes, HAVE_[$1]=no, [$7])
+  check_libheader_feature_name=translit([$1], A-Z, a-z)
+
+  if test "x$HAVE_[$1]" = "xyes"; then
+    check_libheader_save_CPPFLAGS=$CPPFLAGS
+    CPPFLAGS="[$8] $CPPFLAGS"
+    AC_CHECK_HEADER([$4], :, HAVE_[$1]=no)
+    CPPFLAGS=$check_libheader_save_CPPFLAGS
+  fi
+
+  if test "x$HAVE_[$1]" = "xyes"; then
+    ifelse([$5], , :, [$5])
+  else
+    ifelse([$6], , :, [$6])
+  fi
+]
+)
+
+dnl
+dnl AC_CHECK_MPEG2DEC(ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
+dnl
+dnl ACTION-IF-FOUND     - when feature is found then execute given action
+dnl ACTION-IF-NOT-FOUND - when feature is not found then execute given action
+dnl
+dnl Defines HAVE_MPEG2DEC to yes if mpeg2dec is found
+dnl
+dnl CFLAGS and LDFLAGS for the library are stored in MPEG2DEC_CFLAGS and
+dnl MPEG2DEC_LIBS, respectively
+dnl
+dnl Based on GST_CHECK_MPEG2DEC from gstreamer plugins 0.3.3.1
+dnl Thomas Vander Stichele <thomas@apestaart.org>, Andy Wingo <wingo@pobox.com>
+dnl
+AC_DEFUN(AC_CHECK_MPEG2DEC, 
+[dnl
+AC_ARG_WITH(mpeg2dec-prefix,
+    [  --with-mpeg2dec-prefix=PFX   Prefix where mpeg2dec is installed (optional)],
+    mpeg2dec_config_prefix="$withval", mpeg2dec_config_prefix="")
+
+if test x$mpeg2dec_config_prefix = x ; then
+    MPEG2DEC_CHECK_LIBHEADER(MPEG2DEC, mpeg2, mpeg2_init, mpeg2dec/mpeg2.h,
+        MPEG2DEC_LIBS="-lmpeg2 -lmpeg2dec")
+else
+    MPEG2DEC_CHECK_LIBHEADER(MPEG2DEC, mpeg2, mpeg2_init, mpeg2dec/mpeg2.h, [
+            MPEG2DEC_LIBS="-lmpeg2 -lmpeg2dec -L$mpeg2dec_config_prefix/lib"
+            MPEG2DEC_CFLAGS="-I$mpeg2dec_config_prefix/include"
+        ], , -L$mpeg2dec_config_prefix/lib, -I$mpeg2dec_config_prefix/include)
+fi
+ 
+if test "x$HAVE_MPEG2DEC" = "xyes"; then
+  ifelse([$1], , :, [$1])
+else
+  ifelse([$2], , :, [$2])
+fi
+
+AC_SUBST(MPEG2DEC_CFLAGS)
+AC_SUBST(MPEG2DEC_LIBS)
+])