pixman: Branch 'master'

[Matt Turner]

 configure.ac |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit 55698584be93706794b181cbf595846da578e103
Author: Matt Turner <mattst88 at gmail.com>
Date:   Tue May 15 16:32:08 2012 -0400

    configure.ac: Fail the ARM/iwMMXt test if not compiling with -march=iwmmxt
    
    If not compiling with -march=iwmmxt, the configure test will still pass,
    thinking that the __builtin_arm_* intrinsic is a function instead of
    generating a single instruction. Since no linking is done, the configure
    test doesn't catch this, and we get linking errors in the build.

diff --git a/configure.ac b/configure.ac
index 5ff78eb..027a168 100644
--- a/configure.ac
+++ b/configure.ac
@@ -619,6 +619,9 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #ifndef __arm__
 #error "IWMMXT is only available on ARM"
 #endif
+#ifndef __IWMMXT__
+#error "IWMMXT not enabled (with -march=iwmmxt)"
+#endif
 #if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 5))
 #error "Need GCC >= 4.5 for IWMMXT intrinsics"
 #endif