diff options
Diffstat (limited to 'config/ac-macros/check_cpu.m4')
| -rw-r--r-- | config/ac-macros/check_cpu.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/config/ac-macros/check_cpu.m4 b/config/ac-macros/check_cpu.m4 new file mode 100644 index 00000000000..d551f47769e --- /dev/null +++ b/config/ac-macros/check_cpu.m4 @@ -0,0 +1,47 @@ +AC_DEFUN([MYSQL_CHECK_CPU], +[AC_CACHE_CHECK([if compiler supports optimizations for current cpu], +mysql_cv_cpu,[ + +ac_save_CFLAGS="$CFLAGS" +if test -r /proc/cpuinfo ; then + cpuinfo="cat /proc/cpuinfo" + cpu_family=`$cpuinfo | grep 'cpu family' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` + cpu_vendor=`$cpuinfo | grep 'vendor_id' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` +fi +if test "$cpu_vendor" = "AuthenticAMD"; then + if test $cpu_family -ge 6; then + cpu_set="athlon pentiumpro k5 pentium i486 i386"; + elif test $cpu_family -eq 5; then + cpu_set="k5 pentium i486 i386"; + elif test $cpu_family -eq 4; then + cpu_set="i486 i386" + else + cpu_set="i386" + fi +elif test "$cpu_vendor" = "GenuineIntel"; then + if test $cpu_family -ge 6; then + cpu_set="pentiumpro pentium i486 i386"; + elif test $cpu_family -eq 5; then + cpu_set="pentium i486 i386"; + elif test $cpu_family -eq 4; then + cpu_set="i486 i386" + else + cpu_set="i386" + fi +fi + +for ac_arg in $cpu_set; +do + CFLAGS="$ac_save_CFLAGS -mcpu=$ac_arg -march=$ac_arg -DCPU=$ac_arg" + AC_TRY_COMPILE([],[int i],mysql_cv_cpu=$ac_arg; break;, mysql_cv_cpu="unknown") +done + +if test "$mysql_cv_cpu" = "unknown" +then + CFLAGS="$ac_save_CFLAGS" + AC_MSG_RESULT(none) +else + AC_MSG_RESULT($mysql_cv_cpu) +fi +])]) + |