This is a fix for bug#37808

   "make_binary_distribution" does not always generate correct names

Originally, we solved deficiencies of the predefined "autoconf" macros
(at least on OS X 10.5, they do not correctly differ between "x86" and
"x86_64") by providing explicit "--platform" arguments.

With this patch, "make_binary_distribution" evaluates CFLAGS, so it
"just works" because CFLAGS contains information about the target CPU.

This patch is accompanied by a change in our build tools that drops the
setting of "--platform" arguments.

scripts/make_binary_distribution.sh:
  This is a fix for bug#37808
     "make_binary_distribution" does not always generate correct names
  
  Our platform names are the combination of operating system, architecture (CPU),
  and a possible suffix (typically "64bit", if a CPU is available in 32 bit too).
  We get these values from some predefined "autoconf" macros.
  
  However, these macros are not perfect, especially on OS X 10.5 they do not
  differ correctly between x86 (32 bit) and x86_64 (64 bit).
  Originally, we solved that by providing an explicit "--platform" argument,
  but it is better to get rid of that and ensure the script "just works".
  
  The best indication we have about the CPU is the "CFLAGS" value provided
  with "configure" and used in "make": It describes for which CPU the
  binaries are generated, not just which one was running the build.
  This approach should work even if we implement cross-compilation.
  
  So this patch evaluates CFLAGS and extracts its "-arch XYZ" part.
  
  When touching the file, I also replaced some tab characters by blanks.

scripts/make_binary_distribution.sh

@@ -28,6 +28,12 @@ SOURCE=`pwd`
 CP="cp -p"
 MV="mv"
 
+# There are platforms, notably OS X on Intel (x86 + x86_64),
+# for which "uname" does not provide sufficient information.
+# The value of CFLAGS as used during compilation is the most exact info
+# we can get - after all, we care about _what_ we built, not _where_ we did it.
+cflags="@CFLAGS@"
+
 STRIP=1
 DEBUG=0
 SILENT=0
@@ -71,10 +77,44 @@ system=`echo $system | sed -e 's/linux-gnu/linux/g'`
 system=`echo $system | sed -e 's/solaris2.\([0-9]*\)/solaris\1/g'`
 system=`echo $system | sed -e 's/sco3.2v\(.*\)/openserver\1/g'`
 
+# Get the "machine", which really is the CPU architecture (including the size).
+# The precedence is:
+# 1) use an explicit argument, if given;
+# 2) use platform-specific fixes, if there are any (see bug#37808);
+# 3) stay with the default (determined during "configure", using predefined macros).
 if [ x"$MACHINE" != x"" ] ; then
   machine=$MACHINE
+else
+  case $system in
+    osx* )
+      # Extract "XYZ" from CFLAGS "... -arch XYZ ...", or empty!
+      cflag_arch=`echo "$cflags" | sed -n -e 's=.* -arch \([^ ]*\) .*=\1=p'`
+      case "$cflag_arch" in
+        i386 )    case $system in
+                    osx10.4 )  machine=i686 ;; # Used a different naming
+                    * )        machine=x86 ;;
+                  esac ;;
+        x86_64 )  machine=x86_64 ;;
+        ppc )     ;;  # No treatment needed with PPC
+        ppc64 )   ;;
+        * ) # No matching compiler flag? "--platform" is needed
+            if [ x"$PLATFORM" != x"" ] ; then
+              :  # See below: "$PLATFORM" will take precedence anyway
+            elif [ "$system" = "osx10.3" -a -z "$cflag_arch" ] ; then
+              :  # Special case of OS X 10.3, which is PPC-32 only and doesn't use "-arch"
+            else
+              echo "On system '$system' only specific '-arch' values are expected."
+              echo "It is taken from the 'CFLAGS' whose value is:"
+              echo "$cflags"
+              echo "'-arch $cflag_arch' is unexpected, and no '--platform' was given: ABORT"
+              exit 1
+            fi ;;
+      esac  # "$cflag_arch"
+      ;;
+  esac  # $system
 fi
 
+# Combine OS and CPU to the "platform". Again, an explicit argument takes precedence.
 if [ x"$PLATFORM" != x"" ] ; then
   platform="$PLATFORM"
 else
@@ -117,10 +157,10 @@ which_1 ()
     do
       for file in $d/$cmd
       do
-	if [ -x $file -a ! -d $file ] ; then
-	  echo $file
-	  exit 0
-	fi
+        if [ -x $file -a ! -d $file ] ; then
+          echo $file
+          exit 0
+        fi
       done
     done
   done
@@ -354,7 +394,7 @@ if [ $BASE_SYSTEM = "netware" ] ; then
         $BASE/support-files/mysql-log-rotate \
         $BASE/support-files/binary-configure \
         $BASE/support-files/build-tags \
-	$BASE/support-files/MySQL-shared-compat.spec \
+        $BASE/support-files/MySQL-shared-compat.spec \
         $BASE/support-files/ndb-config-2-node.ini \
         $BASE/INSTALL-BINARY
 fi