From 55698584be93706794b181cbf595846da578e103 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Tue, 15 May 2012 16:32:08 -0400 Subject: [PATCH] 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. --- configure.ac | 3 +++ 1 file changed, 3 insertions(+) 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 -- 2.7.4