From patchwork Wed May 16 15:03:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Brodkin X-Patchwork-Id: 914687 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=synopsys.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tyVmhUH5"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40mHky5MWcz9s2k for ; 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Wed, 16 May 2018 15:03:53 +0000 Received: from us01smtprelay-2.synopsys.com ([198.182.60.111] helo=smtprelay.synopsys.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fIxy2-00074j-0C for linux-snps-arc@lists.infradead.org; Wed, 16 May 2018 15:03:51 +0000 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 4960B10C0508 for ; Wed, 16 May 2018 08:03:36 -0700 (PDT) Received: from ru20arcgnu1.internal.synopsys.com (ru20arcgnu1.internal.synopsys.com [10.121.9.48]) by mailhost.synopsys.com (Postfix) with ESMTP id 151775783; Wed, 16 May 2018 08:03:34 -0700 (PDT) From: Alexey Brodkin To: linux-snps-arc@lists.infradead.org Subject: [PATCH] ARC: Explicitly add -mmedium-calls to CFLAGS Date: Wed, 16 May 2018 18:03:30 +0300 Message-Id: <20180516150330.31182-1-abrodkin@synopsys.com> X-Mailer: git-send-email 2.16.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180516_080350_047103_DB49B1DA X-CRM114-Status: GOOD ( 12.74 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [198.182.60.111 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vineet Gupta , Alexey Brodkin , linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org GCC built for arc*-*-linux has "-mmedium-calls" implicitly enabled by default thus we don't see any problems during Linux kernel compilation. ----------------------------->8------------------------ arc-linux-gcc -mcpu=arc700 -Q --help=target | grep calls -mlong-calls [disabled] -mmedium-calls [enabled] ----------------------------->8------------------------ But if we try to use so-called Elf32 toolchain with GCC configured for arc*-*-elf* then we'd see the following failure: ----------------------------->8------------------------ init/do_mounts.o: In function 'init_rootfs': do_mounts.c:(.init.text+0x108): relocation truncated to fit: R_ARC_S21W_PCREL against symbol 'unregister_filesystem' defined in .text section in fs/filesystems.o arc-elf32-ld: final link failed: Symbol needs debug section which does not exist make: *** [vmlinux] Error 1 ----------------------------->8------------------------ That happens because neither "-mmedium-calls" nor "-mlong-calls" are enabled in Elf32 GCC: ----------------------------->8------------------------ arc-elf32-gcc -mcpu=arc700 -Q --help=target | grep calls -mlong-calls [disabled] -mmedium-calls [disabled] ----------------------------->8------------------------ Now to make it possible to use Elf32 toolchain for building Linux kernel we're explicitly add "-mmedium-calls" to CFLAGS. Signed-off-by: Alexey Brodkin Signed-off-by: Alexey Brodkin --- arch/arc/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arc/Makefile b/arch/arc/Makefile index d37f49d6a27f..db9ce90c3cc0 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -16,7 +16,7 @@ endif KBUILD_DEFCONFIG := nsim_700_defconfig -cflags-y += -fno-common -pipe -fno-builtin -D__linux__ +cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs