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mesa: Add -fno-math-errno to CFLAGS.

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Cuts about 9k of .text size.

   text    data     bss     dec     hex filename
4992804  197808   26328 5216940  4f9aac i965_dri.so before
4983676  197808   26328 5207812  4f7704 i965_dri.so after

Also, Darwin's libm does not ever set errno, so if we care about those
systems we shouldn't rely on errno anyway.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Matt Turner 2015-07-31 12:18:37 -07:00
parent 44e90f2a55
commit 875458b778
1 changed files with 3 additions and 0 deletions
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configure.ac
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@ -286,6 +286,9 @@ if test "x$GCC" = xyes; then
# Work around aliasing bugs - developers should comment this out
CFLAGS="$CFLAGS -fno-strict-aliasing"
# We don't want floating-point math functions to set errno
CFLAGS="$CFLAGS -fno-math-errno"
# gcc's builtin memcmp is slower than glibc's
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052
CFLAGS="$CFLAGS -fno-builtin-memcmp"