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[2003:c8:b743:ca00:d378:40a5:117b:b56d]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9ee3c906d6sm42363766b.49.2024.11.07.01.20.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2024 01:20:42 -0800 (PST) From: Thomas Schwinge <tschwinge@HIDDEN> To: creightor@HIDDEN, 72669 <at> debbugs.gnu.org Subject: Re: bug#72669: gcc-toolchain environment variables In-Reply-To: <13ed42af-fd61-4e60-a119-3a4cfee4b888@HIDDEN> References: <13ed42af-fd61-4e60-a119-3a4cfee4b888@HIDDEN> User-Agent: Notmuch/0.30+8~g47a4bad (https://notmuchmail.org) Emacs/29.4 (x86_64-pc-linux-gnu) Date: Thu, 07 Nov 2024 10:20:40 +0100 Message-ID: <87a5ebz9g7.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 72669 X-Mailman-Approved-At: Thu, 07 Nov 2024 09:04:45 -0500 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Indeed this is a problem, when attempting to build GCC in a Guix profile with 'gcc-toolchain' installed. What you may do is create wrapper binaries so that the Guix GCC's 'etc/profile' is only active if using the Guix GCC (that is, when building your cross-GCC's compilers), but isn't active (and therefore 'C_INCLUDE_PATH', 'CPLUS_INCLUDE_PATH', 'LIBRARY_PATH' etc. not defined) when your cross-GCC builds its target libraries. This means, you have to invoke the Guix GCC from outside of the Guix profile. Something like this: $ guix install -p "$GUIX_GCC" gcc-toolchain ..., and then script something like: rm -rf "$GUIX_GCC"_bin mkdir "$GUIX_GCC"_bin for f in "$GUIX_GCC"/bin/* "$GUIX_GCC"/sbin/*; do f_=$(basename "$f") case "$f" in */c++ \ | */g++ \ | */gcc \ | */*-c++ \ | */*-g++ \ | */*-gcc ) cat > "$GUIX_GCC"_bin/"$f_" <<EOF #!/bin/sh set -e d=\$(dirname "\$0") . "\$d"/../$GUIX_GCC/etc/profile "\$d"/../$f "\$@" EOF chmod +x "$GUIX_GCC"_bin/"$f_" ;; *) ln -s ../"$f" "$GUIX_GCC"_bin/"$f_" ;; esac done ..., and instead of '"$GUIX_GCC"/bin/gcc' etc. then use '"$GUIX_GCC"_bin/gcc' etc. In my opinion, the Guix-profile-wide setting of these environment variables (via Guix GCC's 'etc/profile') doesn't feel quite right -- but I'm still new to Guix, so...
bug-guix@HIDDEN
:bug#72669
; Package guix
.
Full text available.Received: (at submit) by debbugs.gnu.org; 16 Aug 2024 12:20:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Aug 16 08:20:15 2024 Received: from localhost ([127.0.0.1]:51831 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1sevwE-0001K7-R4 for submit <at> debbugs.gnu.org; Fri, 16 Aug 2024 08:20:15 -0400 Received: from lists.gnu.org ([209.51.188.17]:34776) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <creightor@HIDDEN>) id 1sesrk-0004Hz-Vl for submit <at> debbugs.gnu.org; Fri, 16 Aug 2024 05:03:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <creightor@HIDDEN>) id 1sesr8-0001zz-Tu for bug-guix@HIDDEN; Fri, 16 Aug 2024 05:02:47 -0400 Received: from layka.disroot.org ([178.21.23.139]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <creightor@HIDDEN>) id 1sesr6-0001Wc-Pd for bug-guix@HIDDEN; Fri, 16 Aug 2024 05:02:46 -0400 Received: from localhost (localhost [127.0.0.1]) by disroot.org (Postfix) with ESMTP id D2D4340EBE for <bug-guix@HIDDEN>; Fri, 16 Aug 2024 11:02:41 +0200 (CEST) X-Virus-Scanned: SPAM Filter at disroot.org Received: from layka.disroot.org ([127.0.0.1]) by localhost (disroot.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ujdyhu8U2hzm for <bug-guix@HIDDEN>; Fri, 16 Aug 2024 11:02:41 +0200 (CEST) Message-ID: <13ed42af-fd61-4e60-a119-3a4cfee4b888@HIDDEN> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1723798960; bh=raZuG4fgEC/2ix9zz1uwfDp1yAjdHbZQQJa7Of50cxY=; h=Date:To:From:Subject; b=RA/kNg0vWX+r+TniQcVzLpKy/oAwy/QH5+zaWaQsAVsgGW0hfNVRGQwkN1Umt+LM0 u1gPTPYoI1cR3piAz3HjZBNZ2RUQSQFrpDuifWgODsouQcJcSD37oe098wX3OyaNjB 3IJYJx59mbcUTcNkMh36sJpXC1ex3n6qLFlkhP9NJyuujZlyj1LZA5l4uxVaNJfEjm Nu3xRMqS00E//LPUGBRIgN2SUoZsGV/2tMQBsoSrYu5sxVeqahBA/ylbZ9aDfbKHCM ktcfF9DhpBWO90P9AxDULtL/2U2pacm6omm1LV9QsxkuSSCrqPJ79LvJsiFIdPt0sV rc+We3khtEN8g== Date: Fri, 16 Aug 2024 12:02:35 +0300 MIME-Version: 1.0 To: bug-guix@HIDDEN Content-Language: en-US From: creightor <creightor@HIDDEN> Subject: gcc-toolchain environment variables Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=178.21.23.139; envelope-from=creightor@HIDDEN; helo=layka.disroot.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Fri, 16 Aug 2024 08:20:11 -0400 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -2.4 (--) Hi, it looks like having the C_INCLUDE_PATH and CPLUS_INCLUDE_PATH environment variables set by the gcc-toolchain package in a profile can cause issues. For example, I have gcc-toolchain installed, compiled a cross-binutils for aarch64-elf and then tried to compile a gcc cross-compiler for the same target using those binutils. These are the flags I used for binutils: --target=aarch64-none-elf --disable-multilib and for the gcc cross-compiler: --target=aarch64-none-elf --disable-multilib --disable-bootstrap --enable-languages=c,c++ --without-headers --with-newlib --disable-hosted-libstdcxx --disable-libssp --disable-libsanitizer From what I understand, there should be no headers available when creating a cross-compiler for a freestanding platform like this. Since these include paths were added with C_INCLUDE_PATH and CPLUS_INCLUDE_PATH, something like `#if __has_include(<sys/auxv.h>)` in gcc's libgcc/config/aarch64/cpuinfo.c evaluated to true and the rest of the build would fail. Unsetting them didn't work since apparently gcc-toolchain relies on them set so I had these two variables unset in BASE_TARGET_EXPORTS in gcc's root Makefile.in which should only apply to the newly built gcc cross-compiler and so the build finished fine.
creightor <creightor@HIDDEN>
:bug-guix@HIDDEN
.
Full text available.bug-guix@HIDDEN
:bug#72669
; Package guix
.
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