Received: (at 77828-done) by debbugs.gnu.org; 20 Apr 2025 06:41:27 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Apr 20 02:41:27 2025 Received: from localhost ([127.0.0.1]:44049 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1u6OMp-0003Pk-41 for submit <at> debbugs.gnu.org; Sun, 20 Apr 2025 02:41:27 -0400 Received: from mail.cs.ucla.edu ([131.179.128.66]:40596) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eggert@HIDDEN>) id 1u6OMl-0003OF-Hq for 77828-done <at> debbugs.gnu.org; Sun, 20 Apr 2025 02:41:24 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id D15383C010844; Sat, 19 Apr 2025 23:41:17 -0700 (PDT) Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id ON_nf5a6C8PF; Sat, 19 Apr 2025 23:41:17 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id AA3D53C010847; Sat, 19 Apr 2025 23:41:17 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu AA3D53C010847 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1745131277; bh=Tcz1Ne68qCtFCnc7HXhvyWtCe/FHYAFO981qOmel+E4=; h=Message-ID:Date:MIME-Version:To:From; b=V3eR47hdUHDDimoMx6AJF9le1mWrgAm86gfADLM+qUxbrQOAhcGLa1lKSRNZNfuXz w547Rgu7K87zuIeaR1salN6EXq4UU/h/vvm1V1wslT8qjHUQP9ugmkA/JlISDlWVtS xdtzY1NtB5WRQVYf/OCjj2YgppVKXiT/8OM57I13lWre2l1dV31+ymOM9DUnHhoB/I IOtTJzkG5KomBeZQ9CvH3WBBjofAn7zlcr1gdE/FQMHGKinxAmstT4nMns9llXs5w+ 9tgjwR9dZdf1pDG2PyNOuZLw3Kcs3v+YVtfsRVVM+q9W50dMNe7ZMku81zjTV2RaD+ T480sPhRSD3bQ== X-Virus-Scanned: amavis at mail.cs.ucla.edu Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id Ye4Zm_gdyTeV; Sat, 19 Apr 2025 23:41:17 -0700 (PDT) Received: from [192.168.254.12] (47-147-225-25.fdr01.snmn.ca.ip.frontiernet.net [47.147.225.25]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 8DFEC3C010844; Sat, 19 Apr 2025 23:41:17 -0700 (PDT) Content-Type: multipart/mixed; boundary="------------aeLCmRmo0s0VUQmhq5Cw68hi" Message-ID: <cbe6ce22-db08-4b49-8294-b43439e118b4@HIDDEN> Date: Sat, 19 Apr 2025 23:41:17 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#77828: LTO build fails with grep 3.12 To: Christian Hesse <list@HIDDEN> References: <20250415112151.092748d5@HIDDEN> Content-Language: en-US From: Paul Eggert <eggert@HIDDEN> Organization: UCLA Computer Science Department In-Reply-To: <20250415112151.092748d5@HIDDEN> X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77828-done Cc: 77828-done <at> debbugs.gnu.org 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 (-) This is a multi-part message in MIME format. --------------aeLCmRmo0s0VUQmhq5Cw68hi Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2025-04-15 10:01, Christian Hesse wrote: > The build succeed as soon as I disable link time optimization. Would be nice > to have a fix for this to reenable lto. Thanks for reporting that. It's a false alarm from GCC. I worked around the problem by installing the attached patch into Gnulib to pacify GCC, and I'm closing the grep bug report. --------------aeLCmRmo0s0VUQmhq5Cw68hi Content-Type: text/x-patch; charset=UTF-8; name="0001-dfa-pacify-gcc-Wstringop-overflow.patch" Content-Disposition: attachment; filename="0001-dfa-pacify-gcc-Wstringop-overflow.patch" Content-Transfer-Encoding: base64 RnJvbSA2MGQ5YjQxMzRmODY2MWRjMjUxMzRkYmU1NGJlMTVmNjEzODcxOGM4IE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBQYXVsIEVnZ2VydCA8ZWdnZXJ0QGNzLnVjbGEuZWR1 PgpEYXRlOiBUdWUsIDE1IEFwciAyMDI1IDEzOjUwOjMyIC0wNzAwClN1YmplY3Q6IFtQQVRD SF0gZGZhOiBwYWNpZnkgZ2NjIC1Xc3RyaW5nb3Atb3ZlcmZsb3cKClByb2JsZW0gcmVwb3J0 ZWQgYnkgQ2hyaXN0aWFuIEhlc3NlIGluOgpodHRwczovL2J1Z3MuZ251Lm9yZy83NzgyOAoq IGxpYi9kZmEuYyAoZGZhYW5hbHl6ZSk6IFBhY2lmeSBnY2MgLWZsdG8gLVdzdHJpbmdvcC1v dmVyZmxvdy4KLS0tCiBDaGFuZ2VMb2cgfCA3ICsrKysrKysKIGxpYi9kZmEuYyB8IDEgKwog MiBmaWxlcyBjaGFuZ2VkLCA4IGluc2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9DaGFuZ2VM b2cgYi9DaGFuZ2VMb2cKaW5kZXggN2QyNTViZTNhMi4uMjgzMjJhMjY1NSAxMDA2NDQKLS0t IGEvQ2hhbmdlTG9nCisrKyBiL0NoYW5nZUxvZwpAQCAtMSwzICsxLDEwIEBACisyMDI1LTA0 LTE1ICBQYXVsIEVnZ2VydCAgPGVnZ2VydEBjcy51Y2xhLmVkdT4KKworCWRmYTogcGFjaWZ5 IGdjYyAtV3N0cmluZ29wLW92ZXJmbG93CisJUHJvYmxlbSByZXBvcnRlZCBieSBDaHJpc3Rp YW4gSGVzc2UgaW46CisJaHR0cHM6Ly9idWdzLmdudS5vcmcvNzc4MjgKKwkqIGxpYi9kZmEu YyAoZGZhYW5hbHl6ZSk6IFBhY2lmeSBnY2MgLWZsdG8gLVdzdHJpbmdvcC1vdmVyZmxvdy4K KwogMjAyNS0wNC0xNSAgQnJ1bm8gSGFpYmxlICA8YnJ1bm9AY2xpc3Aub3JnPgogCiAJZ251 bGliLXRvb2wucHk6IEZpeCBleGNlcHRpb24gZHVyaW5nIC0tdXBkYXRlIHdpdGggY2hhbmdl ZCBtYWNyby1wcmVmaXguCmRpZmYgLS1naXQgYS9saWIvZGZhLmMgYi9saWIvZGZhLmMKaW5k ZXggNjg0MDQzZGQ4Zi4uY2JhY2RjMDRjZiAxMDA2NDQKLS0tIGEvbGliL2RmYS5jCisrKyBi L2xpYi9kZmEuYwpAQCAtMjY5OSw2ICsyNjk5LDcgQEAgZGZhYW5hbHl6ZSAoc3RydWN0IGRm YSAqZCwgYm9vbCBzZWFyY2hmbGFnKQogCiAgIGFkZHRvayAoZCwgQ0FUKTsKICAgaWR4X3Qg dGluZGV4ID0gZC0+dGluZGV4OworICBhc3N1bWUgKDAgPCB0aW5kZXgpOwogCiAjaWZkZWYg REVCVUcKICAgZnByaW50ZiAoc3RkZXJyLCAiZGZhYW5hbHl6ZTpcbiIpOwotLSAKMi40OC4x Cgo= --------------aeLCmRmo0s0VUQmhq5Cw68hi--
Christian Hesse <list@HIDDEN>:Paul Eggert <eggert@HIDDEN>:Debbugs Internal Request <help-debbugs@HIDDEN>
to internal_control <at> debbugs.gnu.org.
Full text available.Paul Eggert <eggert@HIDDEN>
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From: Christian Hesse <list@HIDDEN>
To: bug-grep@HIDDEN
Subject: LTO build fails with grep 3.12
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Content preview: Hello everybody, I am building grep 3.12 in a clean build
environment for Arch Linux. That fails when building with link time
optimization
is enabled: CCLD grep In function 'dfaoptimize', inlined from 'dfaanalyze'
at ../lib/dfa.c:2873:3: ../lib/dfa.c:2606:12: error: writing 1 byte into
a region of size 0 [-Werror=stringop-overflow=] 2606 | flags[0] [...]
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Content preview: Hello everybody, I am building grep 3.12 in a clean build
environment for Arch Linux. That fails when building with link time optimization
is enabled: CCLD grep In function 'dfaoptimize', inlined from 'dfaanalyze'
at ../lib/dfa.c:2873:3: ../lib/dfa.c:2606:12: error: writing 1 byte into
a region of size 0 [-Werror=stringop-overflow=] 2606 | flags[0] [...]
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Hello everybody,
I am building grep 3.12 in a clean build environment for Arch Linux. That
fails when building with link time optimization is enabled:
CCLD grep
In function 'dfaoptimize',
inlined from 'dfaanalyze' at ../lib/dfa.c:2873:3:
../lib/dfa.c:2606:12: error: writing 1 byte into a region of size 0
[-Werror=3Dstringop-overflow=3D] 2606 | flags[0] |=3D OPT_QUEUED;
| ^
In function 'icalloc',
inlined from 'xicalloc' at ../lib/xmalloc.c:304:10,
inlined from 'xizalloc' at ../lib/xmalloc.c:289:10,
inlined from 'dfaoptimize' at ../lib/dfa.c:2589:17,
inlined from 'dfaanalyze' at ../lib/dfa.c:2873:3:
../lib/ialloc.h:91:10: note: destination object of size [0,
9223372036854775807] allocated by 'calloc' 91 | return calloc (n, s);
| ^
lto1: all warnings being treated as errors
The build succeed as soon as I disable link time optimization. Would be nice
to have a fix for this to reenable lto. Let me know if I can provide more
information on this. Thanks!
--=20
main(a){char*c=3D/* Schoene Gruesse */"B?IJj;MEH"
"CX:;",b;for(a/* Best regards my address: */=3D0;b=3Dc[a+=
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putchar(b-1/(/* Chris cc -ox -xc - && ./x */b/42*2-3)*42);}
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Christian Hesse <list@HIDDEN>:bug-grep@HIDDEN.
Full text available.bug-grep@HIDDEN:bug#77828; Package grep.
Full text available.
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