Change CFLAGS order for PPC and ARM configure tests

CFLAGS are always appended to the end of gcc options when compiling
sources in autotools based projects. Configure tests should do the
same. Otherwise build fails on PPC when using CFLAGS="-O2 -mno-altivec"
for example. Similar problem affects ARM.

diff --git a/configure.ac b/configure.ac
index 061a380..fbc73f6 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -318,7 +318,7 @@ fi
 have_vmx_intrinsics=no
 AC_MSG_CHECKING(whether to use VMX/Altivec intrinsics)
 xserver_save_CFLAGS=$CFLAGS
-CFLAGS="$CFLAGS $VMX_CFLAGS"
+CFLAGS="$VMX_CFLAGS $CFLAGS"
 AC_COMPILE_IFELSE([
 #if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
 error "Need GCC >= 3.4 for sane altivec support"
@@ -362,7 +362,7 @@ ARM_SIMD_CFLAGS="-mcpu=arm1136j-s"
 have_arm_simd=no
 AC_MSG_CHECKING(whether to use ARM SIMD assembler)
 xserver_save_CFLAGS=$CFLAGS
-CFLAGS="$CFLAGS $ARM_SIMD_CFLAGS"
+CFLAGS="$ARM_SIMD_CFLAGS $CFLAGS"
 AC_COMPILE_IFELSE([
 int main () {
     asm("uqadd8 r1, r1, r2");
@@ -401,7 +401,7 @@ ARM_NEON_CFLAGS="-mfpu=neon -mcpu=cortex-a8"
 have_arm_neon=no
 AC_MSG_CHECKING(whether to use ARM NEON)
 xserver_save_CFLAGS=$CFLAGS
-CFLAGS="$CFLAGS $ARM_NEON_CFLAGS"
+CFLAGS="$ARM_NEON_CFLAGS $CFLAGS"
 AC_COMPILE_IFELSE([
 #include <arm_neon.h>
 int main () {