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Viewing changes to config/ac-macros/check_cpu.m4

  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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config/ac-macros/check_cpu.m4
 
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AC_DEFUN([MYSQL_CHECK_CPU],
 
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[AC_CACHE_CHECK([if compiler supports optimizations for current cpu],
 
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mysql_cv_cpu,[
 
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ac_save_CFLAGS="$CFLAGS"
 
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if test -r /proc/cpuinfo ; then
 
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  cpuinfo="cat /proc/cpuinfo"
 
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  cpu_family=`$cpuinfo | grep 'cpu family' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1`
 
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  cpu_vendor=`$cpuinfo | grep 'vendor_id' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1`
 
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fi 
 
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if test "$cpu_vendor" = "AuthenticAMD"; then
 
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    if test $cpu_family -ge 6; then
 
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      cpu_set="athlon pentiumpro k5 pentium i486 i386";
 
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    elif test $cpu_family -eq 5; then
 
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      cpu_set="k5 pentium i486 i386";
 
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    elif test $cpu_family -eq 4; then
 
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      cpu_set="i486 i386"
 
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    else
 
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      cpu_set="i386"
 
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    fi
 
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elif test "$cpu_vendor" = "GenuineIntel"; then
 
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    if test $cpu_family -ge 6; then
 
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      cpu_set="pentiumpro pentium i486 i386";
 
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    elif test $cpu_family -eq 5; then
 
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      cpu_set="pentium i486 i386";
 
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    elif test $cpu_family -eq 4; then
 
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      cpu_set="i486 i386"
 
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    else
 
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      cpu_set="i386"
 
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    fi
 
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fi
 
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for ac_arg in $cpu_set;
 
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do
 
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  CFLAGS="$ac_save_CFLAGS -mcpu=$ac_arg -march=$ac_arg -DCPU=$ac_arg" 
 
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  AC_TRY_COMPILE([],[int i],mysql_cv_cpu=$ac_arg; break;, mysql_cv_cpu="unknown")
 
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done
 
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if test "$mysql_cv_cpu" = "unknown"
 
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then
 
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  CFLAGS="$ac_save_CFLAGS"
 
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  AC_MSG_RESULT(none)
 
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else
 
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  AC_MSG_RESULT($mysql_cv_cpu)
 
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fi
 
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])])
 
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