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Tue, 28 Jun 2022 10:33:23 -0700 (PDT) Received: from lili ([2a01:e0a:59b:9120:65d2:2476:f637:db1e]) by smtp.gmail.com with ESMTPSA id e29-20020a5d595d000000b0021bc663ed67sm9001326wri.56.2022.06.28.10.33.22 for <bug-guix@HIDDEN> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jun 2022 10:33:23 -0700 (PDT) From: zimoun <zimon.toutoune@HIDDEN> To: bug-guix@HIDDEN Subject: azpainter does not cross-compile Date: Tue, 28 Jun 2022 19:33:18 +0200 Message-ID: <861qv8elr5.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::429; envelope-from=zimon.toutoune@HIDDEN; helo=mail-wr1-x429.google.com 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: 1.0 (+) X-Debbugs-Envelope-To: submit 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: -2.3 (--) Hi, Following discussions [1,2], this report tracks issue when cross-compiling the package =E2=80=99azpainter=E2=80=99, if it would make s= ense to cross-compile such package. ;-) For the record, upstream [3] does not have a clear bug tracker where to report the issue. 1: <http://issues.guix.gnu.org/issue/55541> 2: <https://yhetil.org/guix/87r13aifi3.fsf_-_@HIDDEN> 3: <https://gitlab.com/azelpg/azpainter> Cheers, simon -------------------- Start of forwarded message -------------------- Subject: [bug#55541] [PATCH] gnu: Add azpainter. From: Maxime Devos <maximedevos@HIDDEN> Date: Fri, 20 May 2022 18:00:22 +0200 Tobias Kortkamp schreef op vr 20-05-2022 om 13:18 [+0200]: > +=C2=A0=C2=A0=C2=A0 (build-system gnu-build-system) ;actually a home grow= n build system > +=C2=A0=C2=A0=C2=A0 (arguments > +=C2=A0=C2=A0=C2=A0=C2=A0 (list #:tests? #f > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 #:phases > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 #~(modify-p= hases %standard-phases > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 (replace 'configure > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 (lambda _ > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (invoke "./configure" > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 (string-append "--prefix=3D" > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 #$output)))) As-is, this home-grown build system is broken when cross-compiling: * When cross-compiling, TARGET-gcc needs to be used instead of gcc. Maybe do (setenv "CC" #$(cc-for-target)) first? * Likewise, TARGET-pkg-config instead of pkg-config (not 100% sure) * It tries to run binaries during ./configure. When cross-compiling, ./conftest will always fail (unless using emulation) and hence always detect =E2=80=98little endian=E2=80=99 but this is incorrect when cross-compiling for big-endian architectures. (Needs some fixes or work-arounds.) You can test with "guix build azpainter --target=3Daarch64-linux-gnu" or such. Also, some other problems. From mlk_studio.c int mFILEreadBE32(FILE *fp,void *buf) { uint8_t v[4]; if(fread(v, 1, 4, fp) < 4) return 1; else { *((uint32_t *)buf) =3D ((uint32_t)v[0] << 24) | (v[1] << 16) | (v[2] << 8) | v[3]; return 0; } } looks like a potential strict-aliasing violation to me, resulting in undefined behaviour -- what if buf is a pointer to an array of, say, doubles? =C2=A0Also a potential alignment problem, though maybe it's only called for sufficiently aligned 'buf'. The strict-aliasing problem can be worked around with -fno-strict-aliasing or maybe just -fno-ipa- strict-aliasing , though I don't know if that's sufficient. Greetings, Maxime. -------------------- End of forwarded message --------------------
zimoun <zimon.toutoune@HIDDEN>
:bug-guix@HIDDEN
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Full text available.bug-guix@HIDDEN
:bug#56285
; Package guix
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