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authorH.Habighorst <tearofadragon@googlemail.com>2009-08-11 03:31:21 +0800
committerMatthew Barnes <mbarnes@redhat.com>2009-08-12 06:15:32 +0800
commitc8464aecbb1691947d8fd7a54e9b9adac85271ed (patch)
treeaebf8b10f35a7653380769865b10a754af419e1e /m4/as-compiler-flag.m4
parent9362a0f9854790a487481dd487985733af73be2c (diff)
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Bug 591326 – Keep m4 macros in their own folder
Diffstat (limited to 'm4/as-compiler-flag.m4')
-rw-r--r--m4/as-compiler-flag.m461
1 files changed, 61 insertions, 0 deletions
diff --git a/m4/as-compiler-flag.m4 b/m4/as-compiler-flag.m4
new file mode 100644
index 0000000000..1c74267a33
--- /dev/null
+++ b/m4/as-compiler-flag.m4
@@ -0,0 +1,61 @@
+dnl as-compiler-flag.m4 0.1.0
+
+dnl autostars m4 macro for detection of compiler flags
+
+dnl David Schleef <ds@schleef.org>
+
+dnl $Id: as-compiler-flag.m4,v 1.1 2005/12/15 23:35:19 ds Exp $
+
+dnl AS_COMPILER_FLAG(CFLAGS, 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_COMPILER_FLAG],
+[
+ AC_MSG_CHECKING([to see if compiler understands $1])
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $1"
+
+ AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+ CFLAGS="$save_CFLAGS"
+
+ if test "X$flag_ok" = Xyes ; then
+ m4_ifvaln([$2],[$2])
+ true
+ else
+ m4_ifvaln([$3],[$3])
+ true
+ fi
+ AC_MSG_RESULT([$flag_ok])
+])
+
+dnl AS_COMPILER_FLAGS(VAR, FLAGS)
+dnl Tries to compile with the given CFLAGS.
+
+AC_DEFUN([AS_COMPILER_FLAGS],
+[
+ list=$2
+ flags_supported=""
+ flags_unsupported=""
+ AC_MSG_CHECKING([for supported compiler flags])
+ for each in $list
+ do
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $each"
+ AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
+ CFLAGS="$save_CFLAGS"
+
+ if test "X$flag_ok" = Xyes ; then
+ flags_supported="$flags_supported $each"
+ else
+ flags_unsupported="$flags_unsupported $each"
+ fi
+ done
+ AC_MSG_RESULT([$flags_supported])
+ if test "X$flags_unsupported" != X ; then
+ AC_MSG_WARN([unsupported compiler flags: $flags_unsupported])
+ fi
+ $1="$$1 $flags_supported"
+])