m4/: Add Dave Schleef's GCC inline assembly detection macro for using in gst-plugins...

Original commit message from CVS:
* m4/Makefile.am:
* m4/as-gcc-inline-assembly.m4:
Add Dave Schleef's GCC inline assembly detection macro
for using in gst-plugins-good in the goom 2k4 plugin.

diff --git a/ChangeLog b/ChangeLog
index 606a304..77dd26c 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-02-26  Jan Schmidt  <jan.schmidt@sun.com>
+
+       * m4/Makefile.am:
+       * m4/as-gcc-inline-assembly.m4:
+       Add Dave Schleef's GCC inline assembly detection macro
+       for using in gst-plugins-good in the goom 2k4 plugin.
+
 2008-02-25  Andy Wingo  <wingo@pobox.com>
 
        * gst-autogen.sh: Instead of only passing certain arguments to

diff --git a/m4/Makefile.am b/m4/Makefile.am
index 3bbf0e9..99ead5c 100644 (file)
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -5,6 +5,7 @@ EXTRA_DIST = \
        as-compiler-flag.m4 \
        as-compiler.m4 \
        as-docbook.m4 \
+       as-gcc-inline-assembly.m4 \
        as-libtool.m4 \
        as-libtool-tags.m4 \
        as-python.m4 \

diff --git a/m4/as-gcc-inline-assembly.m4 b/m4/as-gcc-inline-assembly.m4
new file mode 100644 (file)
index 0000000..af32104
--- /dev/null
+++ b/m4/as-gcc-inline-assembly.m4
@@ -0,0 +1,52 @@
+dnl as-gcc-inline-assembly.m4 0.1.0
+
+dnl autostars m4 macro for detection of gcc inline assembly
+
+dnl David Schleef <ds@schleef.org>
+
+dnl $Id$
+
+dnl AS_COMPILER_FLAG(ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
+dnl Tries to compile with the given CFLAGS.
+dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
+dnl and ACTION-IF-NOT-ACCEPTED otherwise.
+
+AC_DEFUN([AS_GCC_INLINE_ASSEMBLY],
+[
+  AC_MSG_CHECKING([if compiler supports gcc-style inline assembly])
+
+  AC_TRY_COMPILE([], [
+#ifdef __GNUC_MINOR__
+#if (__GNUC__ * 1000 + __GNUC_MINOR__) < 3004
+#error GCC before 3.4 has critical bugs compiling inline assembly
+#endif
+#endif
+__asm__ (""::) ], [flag_ok=yes], [flag_ok=no])
+
+  if test "X$flag_ok" = Xyes ; then
+    $1
+    true
+  else
+    $2
+    true
+  fi
+  AC_MSG_RESULT([$flag_ok])
+])
+
+
+AC_DEFUN([AS_GCC_ASM_POWERPC_FPU],
+[
+  AC_MSG_CHECKING([if compiler supports FPU instructions on PowerPC])
+
+  AC_TRY_COMPILE([], [__asm__ ("fadd 0,0,0"::) ], [flag_ok=yes], [flag_ok=no])
+
+  if test "X$flag_ok" = Xyes ; then
+    $1
+    true
+  else
+    $2
+    true
+  fi
+  AC_MSG_RESULT([$flag_ok])
+])
+