Mesa (master): mesa: Add -fno-math-errno -fno-trapping-math to CXXFLAGS.

[Matt Turner]

Module: Mesa
Branch: master
Commit: 8c8c3f859e9eb8fde014f5837f1adb8b5481be44
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8c8c3f859e9eb8fde014f5837f1adb8b5481be44

Author: Matt Turner <mattst88 at gmail.com>
Date:   Thu Jun 30 15:02:49 2016 -0700

mesa: Add -fno-math-errno -fno-trapping-math to CXXFLAGS.

Not sure why I forgot to add them to CXXFLAGS in commit f55c408067 or
commit 875458b778. Cuts about 1k of .text.

   text     data      bss      dec      hex  filename
5806354   287816    29384  6123554   5d7022  i965_dri.so before
5805497   287744    29384  6122625   5d6c81  i965_dri.so after

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>

---

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

diff --git a/configure.ac b/configure.ac
index accd1a1..bbc3af4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -344,6 +344,9 @@ if test "x$GXX" = xyes; then
 
     # Work around aliasing bugs - developers should comment this out
     CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
+
+    # We don't want floating-point math functions to set errno or trap
+    CXXFLAGS="$CXXFLAGS -fno-math-errno -fno-trapping-math"
 fi
 
 AC_SUBST([MSVC2013_COMPAT_CFLAGS])