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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id jo25-20020a170906f6d900b00730824744dasi472920ejb.507.2022.08.17.05.16.29 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Aug 2022 05:16:30 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=pkQMCO4r; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 6EA6E3858014 for ; Wed, 17 Aug 2022 12:16:22 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6EA6E3858014 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1660738582; bh=S/+y2DXLgZ5EOZ4rOe6Ruqr3JnpS+IgHlFEZHIecLCg=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=pkQMCO4r9899tHlKQ/D4lqPZsdCJ3GQp6smR8IJTCI8LsLi91umyQL042UBa6slZu Gz9GDa+VxNxOilKSuugkRBy2xv9JB89VXSbNVnyd01+hJy/6ktls7IkTdUl0hCKM5z I61DIbhpB23IIIa9Xvnoru7G9ALKzPgRV77Z9hi0= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by sourceware.org (Postfix) with ESMTPS id 6D9BD3858D37 for ; Wed, 17 Aug 2022 12:15:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 6D9BD3858D37 Received: by mail-wm1-x32b.google.com with SMTP id v7-20020a1cac07000000b003a6062a4f81so909211wme.1 for ; Wed, 17 Aug 2022 05:15:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc; bh=S/+y2DXLgZ5EOZ4rOe6Ruqr3JnpS+IgHlFEZHIecLCg=; b=FCODqw35iOk4AHiLRBZMbrKnJQnCh+avIKaO9u9tlmLRR54VjldAj6sNy1hPOfYcCE eMgDIhGQ4K8a1lCNoRmoMfLfjbLHBmKmGbeP2xS0HtmBBsz9U1iZ97i+pZe4UOx2Ge9H TR0/v6Wy34ZSD5fvFWxNa++qp55aTIT7AHQ07kUE0BQS7Pm2ms0iAshnH0osm+z3RTJu H0TLpbAUR0n32ZAwg+P365zYtkLOE0O03lGbXz/0nPvixoUbJPK3voFFtL/AQ0IYATUJ 6r2LAA56ma83fnWhik05J6Vx0xQxW30vXWJu0ZoBC28hVytdzA3DocN8/Vo7QbInNqWF UZXQ== X-Gm-Message-State: ACgBeo0HJTvRhaTiEuvAgJij4DizW20oiW38mpLkDSJJ3AfeH36wMPhZ SLhfODqXwN6MOk5LfeDGZwqObeayZgXwYw== X-Received: by 2002:a05:600c:4e15:b0:3a6:152a:9143 with SMTP id b21-20020a05600c4e1500b003a6152a9143mr1688966wmq.20.1660738536381; Wed, 17 Aug 2022 05:15:36 -0700 (PDT) Received: from max.int.rpsys.net ([2001:8b0:aba:5f3c:3694:2ef4:2932:37d5]) by smtp.gmail.com with ESMTPSA id t126-20020a1c4684000000b003a5fe5ed7edsm2408220wma.0.2022.08.17.05.15.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Aug 2022 05:15:35 -0700 (PDT) To: gcc-patches@gcc.gnu.org Subject: [PATCH 1/2] gcc/file-prefix-map: Allow remapping of relative paths Date: Wed, 17 Aug 2022 13:15:33 +0100 Message-Id: <20220817121534.1825108-1-richard.purdie@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-11.5 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Richard Purdie via Gcc-patches From: Richard Purdie Reply-To: Richard Purdie Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1741410627582842705?= X-GMAIL-MSGID: =?utf-8?q?1741410627582842705?= Relative paths currently aren't remapped by -ffile-prefix-map and friends. When cross compiling with separate 'source' and 'build' directories, the same relative paths between directories may not be available on target as compared to build time. In order to be able to remap these relative build paths to paths that would work on target, resolve paths within the file-prefix-map function using realpath(). This does cause a change of behaviour if users were previously relying upon symlinks or absolute paths not being resolved. Use basename to ensure plain filenames don't have paths added. gcc/ChangeLog: * file-prefix-map.cc (remap_filename): Allow remapping of relative paths Signed-off-by: Richard Purdie --- gcc/file-prefix-map.cc | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/gcc/file-prefix-map.cc b/gcc/file-prefix-map.cc index 24733f831d6..50d5d724a8f 100644 --- a/gcc/file-prefix-map.cc +++ b/gcc/file-prefix-map.cc @@ -70,19 +70,28 @@ remap_filename (file_prefix_map *maps, const char *filename) file_prefix_map *map; char *s; const char *name; + char *realname; size_t name_len; + if (lbasename (filename) == filename) + return filename; + + realname = lrealpath (filename); + for (map = maps; map; map = map->next) - if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0) + if (filename_ncmp (realname, map->old_prefix, map->old_len) == 0) break; - if (!map) + if (!map) { + free (realname); return filename; - name = filename + map->old_len; + } + name = realname + map->old_len; name_len = strlen (name) + 1; s = (char *) ggc_alloc_atomic (name_len + map->new_len); memcpy (s, map->new_prefix, map->new_len); memcpy (s + map->new_len, name, name_len); + free (realname); return s; }