diff options
Diffstat (limited to 'BUILD')
| -rwxr-xr-x | BUILD/check-cpu | 168 |
1 files changed, 126 insertions, 42 deletions
diff --git a/BUILD/check-cpu b/BUILD/check-cpu index 0283c669fb2..3ceb9c269fe 100755 --- a/BUILD/check-cpu +++ b/BUILD/check-cpu @@ -6,113 +6,197 @@ # if test -r /proc/cpuinfo ; then + # on Linux (and others?) we can get detailed CPU information out of /proc cpuinfo="cat /proc/cpuinfo" + + # detect CPU family cpu_family=`$cpuinfo | grep 'family' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` if test -z "$cpu_family" ; then cpu_family=`$cpuinfo | grep 'cpu' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` fi + + # detect CPU vendor and model cpu_vendor=`$cpuinfo | grep 'vendor_id' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1` model_name=`$cpuinfo | grep 'model name' | cut -d ':' -f 2 | head -1` if test -z "$model_name" ; then model_name=`$cpuinfo | grep 'cpu model' | cut -d ':' -f 2 | head -1` fi + + # fallback: get CPU model from uname output if test -z "$model_name" ; then model_name=`uname -m` fi + + # parse CPU flags + for flag in `$cpuinfo | grep 'flags' | sed -e 's/^flags.*: //'`; do + eval cpu_flag_$flag=yes + done else # Fallback when there is no /proc/cpuinfo case "`uname -s`" in - FreeBSD) + FreeBSD|OpenBSD) cpu_family=`uname -m`; - model_name=`sysctl -b hw.model` + model_name=`sysctl -n hw.model` + ;; + Darwin) + cpu_family=`uname -p` + model_name=`machine` ;; *) cpu_family=`uname -m`; - model_name="unknown"; + model_name=`uname -p`; ;; esac fi -cpu_flag="" -cpu_flag_old="" +# detect CPU shortname as used by gcc options +# this list is not complete, feel free to add further entries +cpu_arg="" case "$cpu_family--$model_name" in + # DEC Alpha Alpha*EV6*) - cpu_flag="ev6"; + cpu_arg="ev6"; ;; + + # Intel ia32 *Xeon*) - cpu_flag="nocona"; + # a Xeon is just another pentium4 ... + # ... unless it has the "lm" (long-mode) flag set, + # in that case it's a Xeon with EM64T support + if [ -z "$cpu_flag_lm" ]; then + cpu_arg="pentium4"; + else + cpu_arg="nocona"; + fi ;; - *Pentium*4*Mobile*CPU*) - cpu_flag="pentium4m"; + *Pentium*4*Mobile*) + cpu_arg="pentium4m"; ;; - *Pentium*4*CPU*) - cpu_flag="pentium4"; + *Pentium*4*) + cpu_arg="pentium4"; ;; - *Pentium*III*Mobile*CPU*) - cpu_flag="pentium3m"; + *Pentium*III*Mobile*) + cpu_arg="pentium3m"; ;; - *Pentium*III*CPU*) - cpu_flag="pentium3"; + *Pentium*III*) + cpu_arg="pentium3"; ;; *Pentium*M*pro*) - cpu_flag="pentium-m"; - cpu_flag_old="pentium"; + cpu_arg="pentium-m"; ;; *Athlon*64*) - cpu_flag="athlon64"; - cpu_flag_old="athlon"; + cpu_arg="athlon64"; ;; *Athlon*) - cpu_flag="athlon"; + cpu_arg="athlon"; ;; + + # Intel ia64 *Itanium*) # Don't need to set any flags for itanium(at the moment) - cpu_flag=""; + cpu_arg=""; ;; - *ppc) - cpu_flag="powerpc"; - no_march=1; + + # + *powerpc*) + cpu_arg=`echo $model_name | sed -e"s/ppc//g"` ;; + + # unknown *) - cpu_flag=""; + cpu_arg=""; ;; esac -if test -z "$cpu_flag"; then + +if test -z "$cpu_arg"; then echo "BUILD/check-cpu: Oops, could not findout what kind of cpu this machine is using." - check_cpu_flags="" + check_cpu_cflags="" return fi -echo "cpu_flag: $cpu_flag" - +# different compiler versions have different option names +# for CPU specific command line options if test -z "$CC" ; then cc="gcc"; else cc=$CC - fi cc_ver=`$cc --version | sed 1q` cc_verno=`echo $cc_ver | sed -e 's/[^0-9. ]//g; s/^ *//g; s/ .*//g'` case "$cc_ver--$cc_verno" in - *GCC*--3.4*|*GCC*--3.5*|*GCC*--4.*) - check_cpu_cflags="-mtune=$cpu_flag -march=$cpu_flag" - ;; *GCC*) - # Fix for older compiler versions - if test -n "$cpu_flag_old"; then - cpu_flag="$cpu_flag_old" - fi - check_cpu_cflags="-mcpu=$cpu_flag -march=$cpu_flag" - if test -n "$no_march"; then - check_cpu_cflags="-mcpu=$cpu_flag" - fi + # different gcc backends (and versions) have different CPU flags + case `gcc -dumpmachine` in + i?86-*) + case "$cc_verno" in + 3.4*|3.5*|4.*) + check_cpu_args='-mtune=$cpu_arg -march=$cpu_arg' + ;; + *) + check_cpu_args='-mcpu=$cpu_arg -march=$cpu_arg' + ;; + esac + ;; + ppc-*) + check_cpu_args='-mcpu=$cpu_arg -mtune=$cpu_arg' + ;; + *) + check_cpu_cflags="" + return + ;; + esac + ;; + 2.95.*) + # GCC 2.95 doesn't expose its name in --version output + check_cpu_args='-m$cpu_arg' ;; *) check_cpu_cflags="" + return ;; esac -echo $check_cpu_cflags + +# now we check whether the compiler really understands the cpu type +touch __test.c + +while [ "$cpu_arg" ] ; do + echo -n testing $cpu_arg "... " + + # compile check + check_cpu_cflags=`eval echo $check_cpu_args` + if $cc -c $check_cpu_cflags __test.c 2>/dev/null; then + echo ok + break; + fi + + echo failed + check_cpu_cflags="" + + # if compile failed: check whether it supports a predecessor of this CPU + # this list is not complete, feel free to add further entries + case "$cpu_arg" in + # Intel ia32 + nocona) cpu_arg=pentium4 ;; + prescott) cpu_arg=pentium4 ;; + pentium4m) cpu_arg=pentium4 ;; + pentium4) cpu_arg=pentium3 ;; + pentium3m) cpu_arg=pentium3 ;; + pentium3) cpu_arg=pentium2 ;; + pentium2) cpu_arg=pentiumpro ;; + pentiumpro) cpu_arg=pentium ;; + pentium) cpu_arg=i486 ;; + i486) cpu_arg=i386 ;; + + # power / powerPC + 7450) cpu_arg=7400 ;; + + *) cpu_arg="" ;; + esac +done + +rm __test.* + |