linux-kernel - [PATCH] powerpc: remove pre-build checks for old GCC versions

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Date:   Mon, 27 Aug 2018 11:20:02 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: remove pre-build checks for old GCC versions

Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
bumped the minimum GCC version to 4.6 for all architectures.

The GCC version checks in arch/powerpc/Makefile are obsolete now.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 arch/powerpc/Makefile | 38 +-------------------------------------
 1 file changed, 1 insertion(+), 37 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 11a1acb..57e7358 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -400,40 +400,8 @@ archclean:
 
 archprepare: checkbin
 
-# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
-# to stdout and these checks are run even on install targets.
-TOUT	:= .tmp_gas_check
-
-# Check gcc and binutils versions:
-# - gcc-3.4 and binutils-2.14 are a fatal combination
-# - Require gcc 4.0 or above on 64-bit
-# - gcc-4.2.0 has issues compiling modules on 64-bit
+# Check binutils versions:
 checkbin:
-	@if test "$(cc-name)" != "clang" \
-	    && test "$(cc-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 test "$(cc-name)" != "clang" \
-	    && test "$(cc-version)" -lt "0400" \
-	    && test "x${CONFIG_PPC64}" = "xy" ; then \
-                echo -n "Sorry, GCC v4.0 or above is required to build " ; \
-                echo "the 64-bit powerpc kernel." ; \
-                false ; \
-        fi
-	@if test "$(cc-name)" != "clang" \
-	    && test "$(cc-fullversion)" = "040200" \
-	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
-		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
-		echo 'kernel with modules enabled.' ; \
-		echo -n '*** Please use a different GCC version or ' ; \
-		echo 'disable kernel modules' ; \
-		false ; \
-	fi
 	@if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 	    && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 		echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
@@ -441,7 +409,3 @@ checkbin:
 		echo -n '*** Please use a different binutils version.' ; \
 		false ; \
 	fi
-
-
-CLEAN_FILES += $(TOUT)
-
-- 
2.7.4