configure.ac: Fail the ARM/iwMMXt test if not compiling with -march=iwmmxt
authorMatt Turner <mattst88@gmail.com>
Tue, 15 May 2012 20:32:08 +0000 (16:32 -0400)
committerMatt Turner <mattst88@gmail.com>
Tue, 15 May 2012 20:41:22 +0000 (16:41 -0400)
commit55698584be93706794b181cbf595846da578e103
treedd05007fb4f676562f8b98985aafbe703ba42d69
parent3682b615154338f9754e7c1e046b42bb8ad584fa
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