Date: Wed, 17 Apr 2013 15:16:23 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Dimitry Andric <dim@freebsd.org> Cc: FreeBSD Current <freebsd-current@freebsd.org>, "O. Hartmann" <ohartman@zedat.fu-berlin.de>, FreeBSD ports <freebsd-ports@freebsd.org>, Jan Beich <jbeich@tormail.org> Subject: Re: CURRENT (r249438): (devel/libiconv)./unistd.h:686:5: error: invalid token at start of a preprocessor expression : #if @GNULIB_EUIDACCESS@ Message-ID: <516EF507.6040309@FreeBSD.org> In-Reply-To: <FC566DC6-486C-4741-8491-BEAB2BAAF4CA@FreeBSD.org> References: <1365877246.2093.20.camel@thor.walstatt.dyndns.org> <1URs5b-000B9U-A2@internal.tormail.org> <E15F2208-0A57-4C40-B7B0-FEA7953500AD@FreeBSD.org> <1USKxR-00025i-Tt@internal.tormail.org> <FC566DC6-486C-4741-8491-BEAB2BAAF4CA@FreeBSD.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2013-04-17 06:07:47 -0400, Dimitry Andric wrote: > On Apr 17, 2013, at 07:31, Jan Beich <jbeich@tormail.org> wrote: >> Dimitry Andric <dim@FreeBSD.org> writes: On Apr 16, 2013, at >> 00:42, Jan Beich <jbeich@tormail.org> wrote: > ... >>>> Maybe -O3 overoptimizes regex in libc e.g., >>>> >>>> $ echo '#if @GNULIB_EUIDACCESS@' | sed >>>> 's/@GNULIB_EUIDACCESS@/0/' #if @GNULIB_EUIDACCESS@ >>>> >>>> $ echo 'aaaaaaaaaaaaaaaaxxxaaaa' | sed >>>> 's/aaaaaaaaaaaaxxxaaaa//' aaaaaaaaaaaaaaaaxxxaaaa >>> >>> How did you arrive at this result? >> >> 1/ chroot into poudriere jail for /head amd64 2/ echo CFLAGS+=-O3 >> >> /etc/make.conf 3/ make -j2 (in /usr/src/lib/libc) 4/ prepend >> LD_LIBRARY_PATH=. before sed(1) 5/ rebuild regcomp.o, regcomp.So >> with -O2 to confirm > > I have been able to reproduce this on amd64, with -O3, but not on > i386. It seems regcomp() is either miscompiled at -O3, or it > contains some bug triggered only by the vectorizer. I am still > investigating. ... With "-fno-vectorize", this problem doesn't seem to happen. FYI, Jung-uk Kim -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iQEcBAEBAgAGBQJRbvUHAAoJECXpabHZMqHOekEIAIml2te9436LzTFsr794y82E Vmytl95H+vW9Nj0qK5X/DkB/0MSepL5FZqKF5CSNTXFoNJoVFewYRIH/H5oICSpZ jfS4evF9i2mEDOScTyC/XaucvcVWupLE9Kf7FHEk5YIhDMs4r4nzwMFGkzffEqPK yLkV/Cpc8xjvi28OuXd1KaPIcX3S8Z9vEmWPyljtseRv9WlC5gT44fSz18hmqYmv fWSiML4YKKkDRAPOCy/Shpf5QUcygOul7Jz8RiDBx3O4R5goGW8Ee8Napn7UulSL nAXTHy8dcSbiAqqPKeXhmZGPCotj++P9s3jEvunOxL7lvrdjfy3WtGedcp02ia8= =jwYS -----END PGP SIGNATURE-----
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