[PATCH] ppc32: Don't create .tmp_gas_check

This changes how the ppc32 'checkbin' target works.  Previously we did all
of the tests using variables which would be evaluated for any and every
make target.  This meant that 'make tags' for example would leave behind a
'.tmp_gas_check' file even though we didn't actually compile up anything,
and would get in the way of diffs.  By moving all of this logic directly
into the 'checkbin' target, we only test gcc/gas versions when we're going
to compile.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/Makefile

@@ -112,26 +112,24 @@ include/asm-$(ARCH)/offsets.h: arch/$(ARCH)/kernel/asm-offsets.s
 TOUT	:= .tmp_gas_check
 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 # instructions.
-AS_ALTIVEC	:= $(shell echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; echo $$?)
 # gcc-3.4 and binutils-2.14 are a fatal combination.
 GCC_VERSION	:= $(call cc-version)
-BAD_GCC_AS	:= $(shell echo mftb 5 | $(AS) -mppc -many -o $(TOUT) >/dev/null 2>&1 && echo 0 || echo 1)
 
 checkbin:
-ifeq ($(GCC_VERSION)$(BAD_GCC_AS),03041)
-	@echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '
-	@echo 'correctly with gcc-3.4 and your version of binutils.'
-	@echo '*** Please upgrade your binutils or downgrade your gcc'
-	@false
-endif
-ifneq ($(AS_ALTIVEC),0)
-	echo $(AS_ALTIVEC)
-	@echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '
-	@echo 'correctly with old versions of binutils.'
-	@echo '*** Please upgrade your binutils to 2.12.1 or newer'
-	@false
-endif
-	@true
+	@if test "$(GCC_VERSION)" = "0304" ; then \
+		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
+			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
+			echo 'correctly with gcc-3.4 and your version of binutils.'; \
+			echo '*** Please upgrade your binutils or downgrade your gcc'; \
+			false; \
+		fi ; \
+	fi
+	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
+		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
+		echo 'correctly with old versions of binutils.' ; \
+		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
+		false ; \
+	fi
 
 CLEAN_FILES +=	include/asm-$(ARCH)/offsets.h \
 		arch/$(ARCH)/kernel/asm-offsets.s \