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authorGravatar Matt Colyer2009-04-13 08:48:00 -0700
committerGravatar Matt Colyer2009-04-13 08:48:00 -0700
commit6671ca3d6de6a1fd27853e3b1ce7a81d568703f0 (patch)
tree735c5ace7ed57cd4e19f2fde423b22e6104eaa98 /m4/as-compiler-flag.m4
parentbd31783d7fde0b5bd101f4a3f97ca1aca2aa6fab (diff)
parent288929f45cb2641690879b52ec514097995cd41a (diff)
downloadlibimobiledevice-6671ca3d6de6a1fd27853e3b1ce7a81d568703f0.tar.gz
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Merged in Jonathan's libplist libiphone. [#2 state:resolved]
Diffstat (limited to 'm4/as-compiler-flag.m4')
-rw-r--r--m4/as-compiler-flag.m462
1 files changed, 62 insertions, 0 deletions
diff --git a/m4/as-compiler-flag.m4 b/m4/as-compiler-flag.m4
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+++ b/m4/as-compiler-flag.m4
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+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"
+])
+