From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 7F2523858D39 for ; Thu, 29 Sep 2022 07:07:00 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 7F2523858D39 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1664435220; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=BIZ/Mf06cD43MPNsyMZPuKWt6zOK+ng5aygsTrAgCqs=; b=NGOzjzPdacOhNanQY8jgzqH8AQtbtYIxuVFEPvR5Sbx9xtAM+2KQbT5A4AZkU9y+n2Ylzh 9rGWiPMKqt2Ahk+fK+lx2lb6QSfnKjGh1oUaYAPBpM8D78ZtB0sJ9/msoithUJDgOfCAMd qVlhBgjvu/3h+VyaC5UsCtgtUlTZyvc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-302-_E67crw8PZeclM4dor2eZQ-1; Thu, 29 Sep 2022 03:06:54 -0400 X-MC-Unique: _E67crw8PZeclM4dor2eZQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id CD4C7802801; Thu, 29 Sep 2022 07:06:53 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.192.194]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7B2C6C15BA4; Thu, 29 Sep 2022 07:06:53 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 28T76owa3886835 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Thu, 29 Sep 2022 09:06:50 +0200 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 28T76m8c3886834; Thu, 29 Sep 2022 09:06:48 +0200 Date: Thu, 29 Sep 2022 09:06:48 +0200 From: Jakub Jelinek To: Richard Biener , Jason Merrill , "Joseph S. Myers" Cc: gcc-patches@gcc.gnu.org, Tobias Burnus Subject: [PATCH] driver, cppdefault: Unbreak bootstrap on Debian/Ubuntu [PR107059] Message-ID: Reply-To: Jakub Jelinek MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-3.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hi! My recent change to enable _Float{16,32,64,128,32x,64x,128x} for C++ apparently broke bootstrap on some Debian/Ubuntu setups. Those multiarch targets put some headers into /usr/include/x86_64-linux-gnu/bits/ etc. subdirectory instead of /usr/include/bits/. This is handled by /* /usr/include comes dead last. */ { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 2 }, { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0, 1, 0 }, in cppdefault.cc, where the 2 in the last element of the first initializer means the entry is ignored on non-multiarch and suffixed by the multiarch dir otherwise, so installed gcc has search path like: /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include-fixed /usr/local/include /usr/include/x86_64-linux-gnu /usr/include (when installed with DESTDIR=/home/jakub/gcc/obj01inst). Now, when fixincludes is run, it is processing the whole /usr/include dir and all its subdirectories, so floatn{,-common.h} actually go into .../include-fixed/x86_64-linux-gnu/bits/floatn{,-common.h} because that is where they appear in /usr/include too. In some setups, /usr/include also contains /usr/include/bits -> x86_64-linux-gnu/bits symlink and after the r13-2896 tweak it works. In other setups there is no /usr/include/bits symlink and when one #include given the above search path, it doesn't find the fixincluded header, as /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include-fixed/bits/floatn.h doesn't exist and /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include-fixed/x86_64-linux-gnu/bits/floatn.h isn't searched and so /usr/include/x86_64-linux-gnu/bits/floatn.h wins and we fail because of typedef whatever _Float128; and similar. The following patch ought to fix this. The first hunk by arranging that the installed search path actually looks like: /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include-fixed/x86_64-linux-gnu /home/jakub/gcc/obj01inst/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.0/include-fixed /usr/local/include /usr/include/x86_64-linux-gnu /usr/include and thus for include-fixed it treats it the same as /usr/include. The second FIXED_INCLUDE_DIR entry there is: { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0, /* A multilib suffix needs adding if different multilibs use different headers. */ #ifdef SYSROOT_HEADERS_SUFFIX_SPEC 1 #else 0 #endif }, where SYSROOT_HEADERS_SUFFIX_SPEC is defined only on vxworks or mips*-mti-linux and arranges for multilib path to be appended there. Neither of those systems is multiarch. This isn't enough, because when using the -B option, the driver adds -isystem .../include-fixed in another place, so the second hunk modifies that spot the same. /home/jakub/gcc/obj01/gcc/xgcc -B /home/jakub/gcc/obj01/gcc/ then has search path: /home/jakub/gcc/obj01/gcc/include /home/jakub/gcc/obj01/gcc/include-fixed/x86_64-linux-gnu /home/jakub/gcc/obj01/gcc/include-fixed /usr/local/include /usr/include/x86_64-linux-gnu /usr/include which again is what I think we want to achieve. Bootstrapped/regtested on x86_64-linux (Debian on GCCFarm, though with the /usr/include/bits -> x86_64-linux-gnu/bits symlink). Ok for trunk? 2022-09-29 Jakub Jelinek PR bootstrap/107059 * cppdefault.cc (cpp_include_defaults): If SYSROOT_HEADERS_SUFFIX_SPEC isn't defined, add FIXED_INCLUDE_DIR entry with multilib flag 2 before FIXED_INCLUDE_DIR entry with multilib flag 0. * gcc.cc (do_spec_1): If multiarch_dir, add include-fixed/multiarch_dir paths before include-fixed paths. --- gcc/cppdefault.cc.jj 2022-01-18 11:58:59.411984500 +0100 +++ gcc/cppdefault.cc 2022-09-28 12:11:47.923603783 +0200 @@ -74,6 +74,9 @@ const struct default_include cpp_include #endif #ifdef FIXED_INCLUDE_DIR /* This is the dir for fixincludes. */ +#ifndef SYSROOT_HEADERS_SUFFIX_SPEC + { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0, 2 }, +#endif { FIXED_INCLUDE_DIR, "GCC", 0, 0, 0, /* A multilib suffix needs adding if different multilibs use different headers. */ --- gcc/gcc.cc 2022-09-23 09:02:56.809314447 +0200 +++ gcc/gcc.cc 2022-09-28 21:02:29.751933657 +0200 @@ -6400,6 +6400,18 @@ do_spec_1 (const char *spec, int inswitc if (*sysroot_hdrs_suffix_spec) info.append = concat (info.append, dir_separator_str, multilib_dir, NULL); + else if (multiarch_dir) + { + /* For multiarch, search include-fixed/ + before include-fixed. */ + info.append = concat (info.append, dir_separator_str, + multiarch_dir, NULL); + info.append_len = strlen (info.append); + for_each_path (&include_prefixes, false, info.append_len, + spec_path, &info); + + info.append = "include-fixed"; + } info.append_len = strlen (info.append); for_each_path (&include_prefixes, false, info.append_len, spec_path, &info); Jakub