Bug#9263 GCC4: -mcpu is depricated, use -mtune or -march instead

   - Made a script that selects the best compiler optimizations for the current cpu.
   - Use the script from BUILD/SETUP.sh 


BUILD/SETUP.sh:
  Run check-cpu and use the compiler optimization flags it outputs

BUILD/SETUP.sh

@@ -53,11 +53,14 @@ max_leave_isam_configs="--with-innodb --with-bdb --with-ndbcluster --with-archiv
 max_no_es_configs="$max_leave_isam_configs --without-isam"
 max_configs="$max_no_es_configs --with-embedded-server"
 
-alpha_cflags="-mcpu=ev6 -Wa,-mev6"	# Not used yet
-amd64_cflags="-DBIG_TABLES"
-pentium_cflags="-mcpu=pentiumpro"
-pentium64_cflags="-mcpu=nocona -m64"
-ppc_cflags="-mpowerpc -mcpu=powerpc"
+path=`dirname $0`
+. "$path/check-cpu"
+
+alpha_cflags="$check_cpu_cflags -Wa,-m$cpu_flag"
+amd64_cflags="$check_cpu_cflags -DBIG_TABLES"
+pentium_cflags="$check_cpu_cflags"
+pentium64_cflags="$check_cpu_cflags -m64"
+ppc_cflags="$check_cpu_cflags"
 sparc_cflags=""
 
 # be as fast as we can be without losing our ability to backtrace

BUILD/check-cpu

+#!/bin/sh
+#
+# Check cpu of current machine and find the
+# best compiler optimization flags for gcc
+#
+#
+
+if test -r /proc/cpuinfo ; then
+  cpuinfo="cat /proc/cpuinfo"
+  cpu_family=`$cpuinfo | grep 'family' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1`
+  if test -z "$cpu_family" ; then
+    cpu_family=`$cpuinfo | grep 'cpu' | cut -d ':' -f 2 | cut -d ' ' -f 2 | head -1`
+  fi
+  cpu_vendor=`$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=`$cpuinfo | grep 'cpu model' | cut -d ':' -f 2 | head -1`
+  fi
+  if test -z "$model_name" ; then
+    model_name=`uname -m`
+  fi
+else
+  exit 0
+fi
+
+case "$cpu_family--$model_name" in
+  Alpha*EV6*)
+    cpu_flag="ev6";
+    ;;
+  *Xeon*)
+    cpu_flag="nocona";
+    ;;
+  *Pentium*4*CPU*)
+    cpu_flag="pentium4";
+    ;;
+  *Athlon*64*)
+    cpu_flag="athlon64";
+    ;;
+  *Athlon*)
+    cpu_flag="athlon";
+    ;;
+  *Itanium*)
+    # Don't need to set any flags for itanium(at the moment)
+    cpu_flag="";
+    ;;
+  *ppc)
+    cpu_flag="powerpc";
+    ;;
+  *)
+    cpu_flag="i386";
+    ;;
+esac
+
+echo "cpu_flag: $cpu_flag"
+
+if test -z "$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=$cpu_flag"
+    ;;
+  *GCC*)
+    check_cpu_cflags="-mcpu=$cpu_flag -march=$cpu_flag"
+    ;;
+  *)
+    check_cpu_cflags=""
+    ;;
+esac
+echo $check_cpu_cflags