From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755496AbdCaUjv (ORCPT ); Fri, 31 Mar 2017 16:39:51 -0400 Received: from mout.kundenserver.de ([212.227.126.134]:50408 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755093AbdCaUju (ORCPT ); Fri, 31 Mar 2017 16:39:50 -0400 From: Arnd Bergmann To: Masahiro Yamada Cc: Mark Charlebois , Behan Webster , Arnd Bergmann , Michal Marek , Nicolas Pitre , Kees Cook , Emese Revfy , linux-kernel@vger.kernel.org Subject: [PATCH] kbuild, LLVMLinux: Add -Werror to cc-option to support clang Date: Fri, 31 Mar 2017 22:38:13 +0200 Message-Id: <20170331203826.1507284-1-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K0:6SKJI+1/hwOsq+hITwXtUi9QIYxXkdd/beDs7x0w2bAnPat5kcI tRsatk0ae6d+33wePrsfL4Uhqcj7F0Br2tZ1atcbMK9Ie3+kMNBlsbTy5DkL7v0wDHVy+0l ImsDcDh31tj/rrAzaBCh9pjSZa7Qy1NhRVwtI9qc8ZSK/447LbdTxtiHcDi+jQ9RGoSSAG8 FK6hddYkwJDfdzUPbP/7Q== X-UI-Out-Filterresults: notjunk:1;V01:K0:/nEha7TSPMA=:twmsr6c8nsJv3P4umHHtEU 13ZLR8ODZLOFWfswXTpCEFu3GDo48r1hfSA3Sp7YbsuejO2PqAL7uuxygOGqtGQ1eKtRMJb2W V03j8WGD6SM7d67P6XJjfYuM0bvyt/13WesmbomWKR6SOubMCKdDgNg554ZszUyIy9ltA2LYO kVR0Ru8qdj1mZ5b/nTiUw7tH6jy9uOefMkKRTAtuBSdqWqUurqNIJUtGPBnFv90+kIWsfi6Fi 4eEYS0gebL6HM1Y2z1WA9oG2aP6JsmQ/rcc7NL8hlyll5WK0jaOVRVkvZ7s4rmqFlCOZmS2bN QSd8eRlLbGK3plfyiokwp3ba9iPIEJANIF09u48BsLsB+mLz81ZtRexH6FHsqVeqMT/0PhTpC ff6+coV0suoGhBVTgwoxJlpuajyoN3Hvzvnd8icXbyNiqgZWewH6qM7dJuu5zcd84Qb8j4H5S wnW3k3Evu9zcnw4wXkCYpfbL1Kr4jT/n76RKWJkSOyHNtXGsWfNBATWZvH9y2LULs+GEliTTQ OEBaadNbWoxhBU62/ymy5ru6F2f+OA9rHTpLdXjJE+KLFSMkiCHBOmrULlzORoMSJ75MZgN6e Xk92EE/KNjLaDD06OB85G8NehQcK005zftCpe0AiqmHB0qnPfs3dR/2BjTb5SmptSAfvBERyZ i5SbutnMQ/L6M5RKSiTfCcFd5cp3I7D7pu686XM2sJfpYBA4ZWcbR9qFOEVqFVLKmQeurqeZA 6SB26TvK6iWkrfpk Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mark Charlebois Clang will warn about unknown warnings but will not return false unless -Werror is set. GCC will return false if an unknown warning is passed. Adding -Werror make both compiler behave the same. [arnd: it turns out we need the same patch for testing whether -ffunction-sections works right with gcc. I've build tested extensively with this patch applied, so let's just merge this one now.] Signed-off-by: Mark Charlebois Signed-off-by: Behan Webster Reviewed-by: Jan-Simon Möller Signed-off-by: Arnd Bergmann --- scripts/Kbuild.include | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index d6ca649cb0e9..a70fd26204de 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -116,12 +116,12 @@ CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) cc-option = $(call try-run,\ - $(CC) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) + $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) # cc-option-yn # Usage: flag := $(call cc-option-yn,-march=winchip-c6) cc-option-yn = $(call try-run,\ - $(CC) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) + $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) # cc-option-align # Prefix align with either -falign or -malign @@ -131,7 +131,7 @@ cc-option-align = $(subst -functions=0,,\ # cc-disable-warning # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) cc-disable-warning = $(call try-run,\ - $(CC) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) + $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) # cc-name # Expands to either gcc or clang -- 2.9.0