Received: (at 10197) by debbugs.gnu.org; 2 Dec 2011 19:49:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Dec 02 14:49:26 2011 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1RWZ6q-00070P-Vi for submit <at> debbugs.gnu.org; Fri, 02 Dec 2011 14:49:25 -0500 Received: from pogma.xen.prgmr.com ([68.68.97.8]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <peter@HIDDEN>) id 1RWZ6n-00070G-Ja for 10197 <at> debbugs.gnu.org; Fri, 02 Dec 2011 14:49:23 -0500 Message-ID: <4ED92BAF.9030207@HIDDEN> X-DKIM: Sendmail DKIM Filter v2.8.3 pogma.xen.prgmr.com C6A8ABF5F6 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=pogma.com; s=pogmail; t=1322855344; bh=SSqDhNskY25mHz6s3r+sbDoYbNFK9EcbBpIkUbjPxNE=; h=Date:From:MIME-Version:To:CC:Subject:References:In-Reply-To: Content-Type:Content-Transfer-Encoding; b=ezNmlaCnkStKGn0/cXYghv5+xzTQLjOvKB/px0+iDwRA4/lrx4sk4RGXS1loQjt4r s3aETpnZu/BjOTatDzn1/KvqRckWYcy2z/2pCkUbDXYZyU8CpiRTMHDoWl3ily4Sll JUUEfd08qSgMkirniKKgvSVxHleARS7tmZXhQEKo= Date: Fri, 02 Dec 2011 13:49:03 -0600 From: Peter O'Gorman <peter@HIDDEN> User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.22) Gecko/20110906 Fedora/3.1.14-1.fc14 Thunderbird/3.1.14 MIME-Version: 1.0 To: Eric Blake <eblake@HIDDEN> Subject: Re: bug#10197: compilation failure with no message caused by libtool References: <4ED91BD2.2050706@HIDDEN> In-Reply-To: <4ED91BD2.2050706@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -3.2 (---) X-Debbugs-Envelope-To: 10197 Cc: 10197 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://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: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Sender: debbugs-submit-bounces <at> debbugs.gnu.org Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org X-Spam-Score: -3.2 (---) On 12/02/2011 12:41 PM, Eric Blake wrote: > > Any suggestions on how to make libtool display the compiler errors that > occur only when -fPIC is missing? Or am I stuck not using > -fipa-pure-const without also passing -O? Does -no-suppress do this? Peter
bug-libtool@HIDDEN:bug#10197; Package libtool.
Full text available.Received: (at submit) by debbugs.gnu.org; 2 Dec 2011 18:41:52 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Dec 02 13:41:52 2011 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1RWY3T-0005Nw-CC for submit <at> debbugs.gnu.org; Fri, 02 Dec 2011 13:41:51 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from <eblake@HIDDEN>) id 1RWY3O-0005Ni-70 for submit <at> debbugs.gnu.org; Fri, 02 Dec 2011 13:41:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <eblake@HIDDEN>) id 1RWY36-00052H-BF for submit <at> debbugs.gnu.org; Fri, 02 Dec 2011 13:41:30 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-8.1 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([140.186.70.17]:53255) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <eblake@HIDDEN>) id 1RWY36-00052D-7x for submit <at> debbugs.gnu.org; Fri, 02 Dec 2011 13:41:28 -0500 Received: from eggs.gnu.org ([140.186.70.92]:41522) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <eblake@HIDDEN>) id 1RWY34-00054b-U8 for bug-libtool@HIDDEN; Fri, 02 Dec 2011 13:41:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <eblake@HIDDEN>) id 1RWY33-00050P-47 for bug-libtool@HIDDEN; Fri, 02 Dec 2011 13:41:26 -0500 Received: from mx1.redhat.com ([209.132.183.28]:31771) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <eblake@HIDDEN>) id 1RWY32-00050J-Tb for bug-libtool@HIDDEN; Fri, 02 Dec 2011 13:41:25 -0500 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id pB2IfNPJ024095 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for <bug-libtool@HIDDEN>; Fri, 2 Dec 2011 13:41:24 -0500 Received: from [10.3.113.136] (ovpn-113-136.phx2.redhat.com [10.3.113.136]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id pB2IfNgN008900; Fri, 2 Dec 2011 13:41:23 -0500 Message-ID: <4ED91BD2.2050706@HIDDEN> Date: Fri, 02 Dec 2011 11:41:22 -0700 From: Eric Blake <eblake@HIDDEN> Organization: Red Hat User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111115 Thunderbird/8.0 MIME-Version: 1.0 To: bug-libtool@HIDDEN Subject: compilation failure with no message caused by libtool X-Enigmail-Version: 1.3.3 OpenPGP: url=http://people.redhat.com/eblake/eblake.gpg Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig997CE80334FC3FD9B13BBB29" X-Scanned-By: MIMEDefang 2.68 on 10.5.11.25 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.17 X-Spam-Score: -8.0 (--------) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <http://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: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Sender: debbugs-submit-bounces <at> debbugs.gnu.org Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org X-Spam-Score: -8.0 (--------) This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig997CE80334FC3FD9B13BBB29 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I ran into a weird case today - trying to compile libvirt with CFLAGS including -Wsuggest-attribute=3Dpure -fipa-pure-const produced a compile failure, but no message. It turns out that for the file in question, libtool ended up compiling things twice, but gcc only warns when -fPIC is not in effect (for some reason, the combination of fPIC and -fipa-pure-const appears to not catch the warning, unless -O is also present). $ gcc -std=3Dgnu99 -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wsuggest-attribute=3Dpure -fipa-pure-const -c util/buf.c -fPIC -DPIC -o a.o $ gcc -std=3Dgnu99 -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wsuggest-attribute=3Dpure -fipa-pure-const -c util/buf.c -o b.o util/buf.c:86:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] util/buf.c:227:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] util/buf.c:242:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] But because the warning only occurs during the second compilation, I end up with no warning message: $ make make all-am make[1]: Entering directory `/home/remote/eblake/libvirt/src' CC libvirt_util_la-buf.lo make[1]: *** [libvirt_util_la-buf.lo] Error 1 make[1]: Leaving directory `/home/remote/eblake/libvirt/src' make: *** [all] Error 2 Proof that -O makes a difference: $ gcc -std=3Dgnu99 -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wsuggest-attribute=3Dpure -fipa-pure-const -c util/buf.c -fPIC -DPIC -o a.o -O util/buf.c: In function =E2=80=98virBufferGetIndent=E2=80=99: util/buf.c:86:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] util/buf.c: In function =E2=80=98virBufferError=E2=80=99: util/buf.c:227:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] util/buf.c: In function =E2=80=98virBufferUse=E2=80=99: util/buf.c:242:1: warning: function might be candidate for attribute =E2=80=98pure=E2=80=99 [-Wsuggest-attribute=3Dpure] The full libtool invocation in question: $ make V=3D1 make all-am make[1]: Entering directory `/home/remote/eblake/libvirt/src' /bin/sh ../libtool --tag=3DCC --mode=3Dcompile ccache gcc -std=3Dgnu99= -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wall -W -Wformat-y2k -Wformat-security -Winit-self -Wmissing-include-dirs -Wunused -Wunknown-pragmas -Wstrict-aliasing -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Wnested-externs -Winline -Winvalid-pch -Wvolatile-register-var -Wdisabled-optimization -Wbuiltin-macro-redefined -Wmudflap -Wpacked-bitfield-compat -Wsync-nand -Wattributes -Wcoverage-mismatch -Wmultichar -Wabi -Wcpp -Wdeprecated -Wdeprecated-declarations -Wdiv-by-zero -Wdouble-promotion -Wendif-labels -Wextra -Wformat-contains-nul -Wformat-extra-args -Wformat-zero-length -Wformat=3D2 -Wmultichar -Wnormalized=3Dnfc -Woverflow -Wpointer-to-int-c= ast -Wpragmas -Wsuggest-attribute=3Dconst -Wsuggest-attribute=3Dnoreturn -Wsuggest-attribute=3Dpure -Wtrampolines -Wno-missing-field-initializers -Wno-sign-compare -Wjump-misses-init -Wno-format-nonliteral -Wframe-larger-than=3D4096 -Wp,-D_FORTIFY_SOURCE=3D2 -fstack-protector-al= l --param=3Dssp-buffer-size=3D4 -fexceptions -fasynchronous-unwind-tables -fdiagnostics-show-option -funit-at-a-time -fipa-pure-const -Werror -g -MT libvirt_util_la-buf.lo -MD -MP -MF .deps/libvirt_util_la-buf.Tpo -c -o libvirt_util_la-buf.lo `test -f 'util/buf.c' || echo './'`util/buf.= c libtool: compile: ccache gcc -std=3Dgnu99 -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wall -W -Wformat-y2k -Wformat-security -Winit-self -Wmissing-include-dirs -Wunused -Wunknown-pragmas -Wstrict-aliasing -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Wnested-externs -Winline -Winvalid-pch -Wvolatile-register-var -Wdisabled-optimization -Wbuiltin-macro-redefined -Wmudflap -Wpacked-bitfield-compat -Wsync-nand -Wattributes -Wcoverage-mismatch -Wmultichar -Wabi -Wcpp -Wdeprecated -Wdeprecated-declarations -Wdiv-by-zero -Wdouble-promotion -Wendif-labels -Wextra -Wformat-contains-nul -Wformat-extra-args -Wformat-zero-length -Wformat=3D2 -Wmultichar -Wnormalized=3Dnfc -Woverfl= ow -Wpointer-to-int-cast -Wpragmas -Wsuggest-attribute=3Dconst -Wsuggest-attribute=3Dnoreturn -Wsuggest-attribute=3Dpure -Wtrampolines -Wno-missing-field-initializers -Wno-sign-compare -Wjump-misses-init -Wno-format-nonliteral -Wframe-larger-than=3D4096 -Wp,-D_FORTIFY_SOURCE=3D= 2 -fstack-protector-all --param=3Dssp-buffer-size=3D4 -fexceptions -fasynchronous-unwind-tables -fdiagnostics-show-option -funit-at-a-time -fipa-pure-const -Werror -g -MT libvirt_util_la-buf.lo -MD -MP -MF =2Edeps/libvirt_util_la-buf.Tpo -c util/buf.c -fPIC -DPIC -o =2Elibs/libvirt_util_la-buf.o libtool: compile: ccache gcc -std=3Dgnu99 -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../src/util -I../include -DIN_LIBVIRT -I/usr/include/libxml2 -Wall -W -Wformat-y2k -Wformat-security -Winit-self -Wmissing-include-dirs -Wunused -Wunknown-pragmas -Wstrict-aliasing -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wwrite-strings -Wlogical-op -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Wnested-externs -Winline -Winvalid-pch -Wvolatile-register-var -Wdisabled-optimization -Wbuiltin-macro-redefined -Wmudflap -Wpacked-bitfield-compat -Wsync-nand -Wattributes -Wcoverage-mismatch -Wmultichar -Wabi -Wcpp -Wdeprecated -Wdeprecated-declarations -Wdiv-by-zero -Wdouble-promotion -Wendif-labels -Wextra -Wformat-contains-nul -Wformat-extra-args -Wformat-zero-length -Wformat=3D2 -Wmultichar -Wnormalized=3Dnfc -Woverfl= ow -Wpointer-to-int-cast -Wpragmas -Wsuggest-attribute=3Dconst -Wsuggest-attribute=3Dnoreturn -Wsuggest-attribute=3Dpure -Wtrampolines -Wno-missing-field-initializers -Wno-sign-compare -Wjump-misses-init -Wno-format-nonliteral -Wframe-larger-than=3D4096 -Wp,-D_FORTIFY_SOURCE=3D= 2 -fstack-protector-all --param=3Dssp-buffer-size=3D4 -fexceptions -fasynchronous-unwind-tables -fdiagnostics-show-option -funit-at-a-time -fipa-pure-const -Werror -g -MT libvirt_util_la-buf.lo -MD -MP -MF =2Edeps/libvirt_util_la-buf.Tpo -c util/buf.c -o libvirt_util_la-buf.o >/dev/null 2>&1 make[1]: *** [libvirt_util_la-buf.lo] Error 1 make[1]: Leaving directory `/home/remote/eblake/libvirt/src' make: *** [all] Error 2 Any suggestions on how to make libtool display the compiler errors that occur only when -fPIC is missing? Or am I stuck not using -fipa-pure-const without also passing -O? --=20 Eric Blake eblake@HIDDEN +1-919-301-3266 Libvirt virtualization library http://libvirt.org --------------enig997CE80334FC3FD9B13BBB29 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBCAAGBQJO2RvSAAoJEKeha0olJ0NqdYgH/0PIOVFZD8dVnvJLjbrcnJvj ealntTOjrnd+aMz2IjQaladfs5aXfl8D3YLbSEf9Ux2iTA0SvgQ67wp5w0Anks1U SPA5MqXfgatAAVLeQCF8o+vY1FbkpD1OzykvpGOkdI/chMxyH8S5vGOsK8zyN3T2 x/RWo8T0Uvnj5FATFMwS3koOF1bf/SH8fnVWKTwmSywEgu/7ziDIDArHiemKjbkn kfLZuczUcWE140w4iSVJdA/ItmnPJ/yqv9rQWf8R9mmF2Tn1PnLGSy4tgL8DJS43 oul8ztR89AgP6H6/7+p6uKCCFM6C/3W4FxOLsA0ztWKFSt8ybiCzgVecYGV66mM= =xbEk -----END PGP SIGNATURE----- --------------enig997CE80334FC3FD9B13BBB29--
Eric Blake <eblake@HIDDEN>:bug-libtool@HIDDEN.
Full text available.bug-libtool@HIDDEN:bug#10197; Package libtool.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.