Date: Wed, 24 Sep 2003 13:19:49 -0400 From: Michael Edenfield <kutulu@kutulu.org> To: Ian Dowse <iedowse@maths.tcd.ie> Cc: Freebsd Current <current@freebsd.org> Subject: Re: Fixing -pthreads (Re: ports and -current) Message-ID: <20030924171949.GA90989@wombat.localnet> In-Reply-To: <200309241703.aa94887@salmon.maths.tcd.ie> References: <Pine.GSO.4.10.10309241029001.26896-100000@pcnet5.pcnet.com> <200309241703.aa94887@salmon.maths.tcd.ie>
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--LZvS9be/3tNcYl/X Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Ian Dowse <iedowse@maths.tcd.ie> [030924 12:03]: > In message <Pine.GSO.4.10.10309241029001.26896-100000@pcnet5.pcnet.com>, = Daniel > Eischen writes: > >On Wed, 24 Sep 2003, Scott Long wrote: > >> PTHREAD_LIBS is a great tool for the /usr/ports mechanism, but doesn't > >> mean anything outside of that. > > > >That just meant it makes it easier to maintain ports so that > >they are PTHREAD_LIBS compliant (they would break when linked). > >I know it has no bearing on 3rd party stuff. >=20 > Just to throw one further approach out on the table, below is a > patch that makes gcc read from a file to determine what library to > associate with the -pthread flag. It's a hack of course, and probably > neither correct or optimal. If you want to make -pthread mean libkse, > create an /etc/pthread.libs that looks like: I was looking through gcc last night to see how conceptually difficult it would be to do something like this. But instead of a file, I was thinking of this process: * if env("PTHREADS_LIBS") then LDFLAGS +=3D PTHREADS_LIBS * elseif fileexists("libpthread") then LDFLAGS +=3D -lpthread * elseif fileexists("libthr") then LDFLAGS +=3D -lthr * elseif fileexists("libc_r") then LDFLAGS +=3D -lc_r * else error("Threading not supported.") or whatever. At that point, simply having PTHREADS_LIBS moved into the environment in bsd.port.mk and leaving all the ports using -pthread alone would automatically have them support PTHREADS_LIBS. Even better, the existing bsd.port.mk construct could become just another pre-defined environment variable, similar to LD_PRELOAD for the runtime linker, but which affects the compiler/link editor instead. --Mike --LZvS9be/3tNcYl/X Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQE/cdI1CczNhKRsh48RAqUbAKDLQxKeEwWYhppEk6WkOEHYl3RkZQCg2JVO xphmwdFOBkOhkNJ+/S8r5Bc= =tvnP -----END PGP SIGNATURE----- --LZvS9be/3tNcYl/X--
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