crossgcc: Fix buildgcc on Mac OS X

Once again, the compiler we use on Mac OS X had trouble compiling GCC.
Switch to llvm-gcc because that one works with Xcode 4.5.2 and gcc 4.7.2.
Also drop the -W flags not known to Xcode from the iasl Makefile, and
drop the --remove-destination option from the copy, because that does not
exist on Darwin.

Change-Id: I9f978f65b5ae7edee2ecdcab337772e7a692bd9b
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1967
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

util/crossgcc/buildgcc

@@ -20,8 +20,8 @@
 # Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA  02110-1335, USA
 #
 
-CROSSGCC_DATE="November 15th, 2012"
-CROSSGCC_VERSION="1.19"
+CROSSGCC_DATE="December 4th, 2012"
+CROSSGCC_VERSION="1.20"
 
 # default settings
 TARGETDIR=`pwd`/xgcc
@@ -336,12 +336,11 @@ if [ `uname` = "Darwin" ]; then
 		OPTIONS="ABI=32"
 	fi
 
-	# In Xcode 4 the default compiler was switched to gcc-llvm.
-	# However, this compiler fails to compile gcc 4.6.x. As a
-	# workaround it's possible to compile gcc with gcc-4.2 or
-	# clang.
+	# In Xcode 4.5.2 the default compiler is clang.
+	# However, this compiler fails to compile gcc 4.7.x. As a
+	# workaround it's possible to compile gcc with llvm-gcc.
 	if $CC -v 2>&1 | grep -q LLVM; then
-		CC=clang
+		CC=llvm-gcc
 	fi
 fi
 
@@ -599,17 +598,17 @@ printf "Building IASL ${IASL_VERSION} ... "
 (
 	cd $IASL_DIR/generate/unix
 	export PATH=$PATH:$DESTDIR$TARGETDIR/bin
-	rm -f ../../source/compiler/.failed
+	rm -f .failed
 	CFLAGS="$HOSTCFLAGS"
-	$MAKE CC="$CC" iasl || touch ../../source/compiler/.failed
-	rm -f $DESTDIR$TARGETDIR/bin/iasl || touch ../../source/compiler/.failed
-	if [ -d bin32 ]; then cp bin32/iasl $DESTDIR$TARGETDIR/bin || touch ../../source/compiler/.failed ; fi
-	if [ -d bin64 ]; then cp bin64/iasl $DESTDIR$TARGETDIR/bin || touch ../../source/compiler/.failed ; fi
-	if [ ! -f ../../source/compiler/.failed ]; then touch ../../source/compiler/.success; fi
+	$MAKE CC="$CC" iasl || touch .failed
+	rm -f $DESTDIR$TARGETDIR/bin/iasl || touch .failed
+	if [ -d bin32 ]; then cp bin32/iasl $DESTDIR$TARGETDIR/bin || touch .failed ; fi
+	if [ -d bin64 ]; then cp bin64/iasl $DESTDIR$TARGETDIR/bin || touch .failed ; fi
+	if [ ! -f .failed ]; then touch .success; fi
 ) > $IASL_DIR/source/compiler/crossgcc-build.log 2>&1
-test -r $IASL_DIR/source/compiler/.failed && printf "${RED}failed${NC}\n" || \
+test -r $IASL_DIR/generate/unix/.failed && printf "${RED}failed${NC}\n" || \
 	     printf "${green}ok${NC}\n"
-test -r $IASL_DIR/source/compiler/.failed && exit 1
+test -r $IASL_DIR/generate/unix/.failed && exit 1
 fi
 
 if [ $SAVETEMPS -eq 0 ]; then

util/crossgcc/patches/acpica-unix-20121114_drop_cflags_unknown_to_xcode.patch

@@ -0,0 +1,20 @@
+diff -ur acpica-unix-20121114.orig/generate/unix/Makefile.config acpica-unix-20121114/generate/unix/Makefile.config
+--- acpica-unix-20121114.orig/generate/unix/Makefile.config	2012-11-14 08:22:38.000000000 -0800
++++ acpica-unix-20121114/generate/unix/Makefile.config	2012-12-05 15:53:35.000000000 -0800
+@@ -135,15 +135,11 @@
+     -Waggregate-return \
+     -Wchar-subscripts \
+     -Wempty-body \
+-    -Wlogical-op \
+     -Wmissing-declarations \
+     -Wmissing-field-initializers \
+-    -Wmissing-parameter-type \
+     -Wnested-externs \
+-    -Wold-style-declaration \
+     -Wold-style-definition \
+-    -Wredundant-decls \
+-    -Wtype-limits
++    -Wredundant-decls
+ 
+ #
+ # Extra warning flags (possible future use)

util/crossgcc/patches/acpica-unix-20121114_no_remove_destination.patch

@@ -0,0 +1,12 @@
+diff -ur acpica-unix-20121114.orig/generate/unix/Makefile.config acpica-unix-20121114/generate/unix/Makefile.config
+--- acpica-unix-20121114.orig/generate/unix/Makefile.config	2012-12-05 16:11:48.000000000 -0800
++++ acpica-unix-20121114/generate/unix/Makefile.config	2012-12-05 16:12:31.000000000 -0800
+@@ -57,7 +57,7 @@
+ #
+ COPYPROG = \
+ 	@mkdir -p ../$(BINDIR); \
+-	cp --remove-destination $(PROG) ../$(BINDIR); \
++	cp $(PROG) ../$(BINDIR); \
+ 	echo "Copied $(PROG) to $(FINAL_PROG)";
+ 
+ #