Use gcc-4.2 and the 10.5 SDK by default in Gecko 1.9.3. Gecko 1.9.3 builds will no longer run on Mac OS X 10.4. b=501436 r=ted

build/macosx/universal/mozconfig

@@ -46,7 +46,7 @@ DARWIN_VERSION=`uname -r`
 ac_add_app_options ppc  --target=powerpc-apple-darwin$DARWIN_VERSION
 ac_add_app_options i386 --target=i386-apple-darwin$DARWIN_VERSION
 
-ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.4u.sdk
+ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.5.sdk
 
 # $MOZ_BUILD_APP is only defined when sourced by configure.  That's not a
 # problem, because the variables it affects only need to be set for
@@ -54,7 +54,7 @@ ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.4u.sdk
 if test -n "$MOZ_BUILD_APP" ; then
 if test "$MOZ_BUILD_APP" = "i386" -o  "$MOZ_BUILD_APP" = "ppc"; then
   TARGET_CPU=$MOZ_BUILD_APP
-  GCC_VERSION=4.0
+  GCC_VERSION=4.2
 
   # It's not strictly necessary to specify -arch during native builds, but it
   # makes the merged about:buildconfig easier to follow, and it reduces
@@ -65,8 +65,8 @@ if test "$MOZ_BUILD_APP" = "i386" -o  "$MOZ_BUILD_APP" = "ppc"; then
   # $HOST_CXX is presently unused.  $HOST_CC will only be used during a cross
   # compile.  Always use the 4.0 compiler, since it will always be present and
   # will always work.
-  HOST_CC=gcc-4.0
-  HOST_CXX=g++-4.0
+  HOST_CC=gcc-4.2
+  HOST_CXX=g++-4.2
 
   # These must be set for cross builds, and don't hurt straight builds.
   RANLIB=ranlib

configure.in

@@ -354,8 +354,8 @@ if test -n "$CROSS_COMPILE" && test "$target" != "$host"; then
         dnl checks will fail.  Fake a working SDK in that case.
         _SAVE_CFLAGS=$CFLAGS
         _SAVE_CXXFLAGS=$CXXLAGS
-        CFLAGS="-isysroot /Developer/SDKs/MacOSX10.4u.sdk $CFLAGS"
-        CXXFLAGS="-isysroot /Developer/SDKs/MacOSX10.4u.sdk $CXXFLAGS"
+        CFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk $CFLAGS"
+        CXXFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk $CXXFLAGS"
         ;;
     esac
 
@@ -904,7 +904,7 @@ dnl Check for MacOS deployment target version
 dnl ========================================================
 
 MOZ_ARG_ENABLE_STRING(macos-target,
-                      [  --enable-macos-target=VER (default=10.4)
+                      [  --enable-macos-target=VER (default=10.5)
                           Set the minimum MacOS version needed at runtime],
                       [_MACOSX_DEPLOYMENT_TARGET=$enableval])