Mercurial > sdl-ios-xcode
changeset 2820:33ddad305f3d
Make sure that we don't generate floating point code that would cause illegal instruction exceptions on older processors, unless someone passes --enable-ssemath to configure.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 01 Dec 2008 23:09:09 +0000 |
| parents | 222aa027e650 |
| children | c4eccbd21d16 |
| files | configure.in |
| diffstat | 1 files changed, 24 insertions(+), 0 deletions(-) [+] |
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--- a/configure.in Mon Dec 01 09:45:01 2008 +0000 +++ b/configure.in Mon Dec 01 23:09:09 2008 +0000 @@ -394,6 +394,30 @@ fi fi + # Make sure that we don't generate floating point code that would + # cause illegal instruction exceptions on older processors + case "$host" in + *-*-darwin*) + # Don't need to worry about Apple hardware, it's all SSE capable + default_ssemath=yes + ;; + *64-*-*) + # x86 64-bit architectures all have SSE instructions + default_ssemath=yes + ;; + *) + default_ssemath=no + ;; + esac + AC_ARG_ENABLE(ssemath, +AC_HELP_STRING([--enable-ssemath], [Allow GCC to use SSE floating point math [[default=no]]]), + , enable_ssemath=$default_ssemath) + if test x$enable_ssemath = xno; then + if test x$have_gcc_sse = xyes -o x$have_gcc_sse2 = xyes; then + EXTRA_CFLAGS="$EXTRA_CFLAGS -mfpmath=387" + fi + fi + AC_ARG_ENABLE(altivec, AC_HELP_STRING([--enable-altivec], [use Altivec assembly routines [[default=yes]]]), , enable_altivec=yes)