Date: Fri, 6 Aug 2004 16:18:59 -0400 (EDT) From: Daniel Eischen <eischen@vigrid.com> To: Robert Watson <rwatson@freebsd.org> Cc: davidxu@freebsd.org Subject: Re: A way to build and install libpthread as 1:1 as well as M:N? Message-ID: <Pine.GSO.4.10.10408061613340.19298-100000@pcnet5.pcnet.com> In-Reply-To: <Pine.NEB.3.96L.1040719111516.50673B-100000@fledge.watson.org>
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On Mon, 19 Jul 2004, Robert Watson wrote: > On Sun, 18 Jul 2004, Daniel Eischen wrote: > > > > The issue here is my keeping everything in sync and making sure testing is > > > reproduceable. If I'm manually building and installing threading > > > libraries, I'm likely to screw it up. I was hoping for a mechanism in > > > buildworld/installworld so that it all happens automatically, reducing the > > > chances of user error, stale library versions, etc. > > > > Well, like I said, if we can agree on a place to put the 1:1 version and > > what to call it, we can make it happen. My suggestion is to keep the > > libraries named the same, install them in different places, and use > > LD_LIBRARY_PATH to switch between them. > > > > Should I just do it, or is more discussion needed? > > Other than the need for something like it, I don't have much opinion on > the mechanism by which it's accomplished. I think that what you suggest > sounds pretty reasonable to me. I'd be fine with a libpthread11, a > lib/foo/libpthread, or whatever makes the most sense to you. I guess > maybe I have a slight preference for libpthread11, but agree that the > benefits of being able to use LD_LIBRARY_PATH are substantial and probably > more important than the slight asthetic preference. Well, it didn't add much to the library to allow either 1:1 or M:N. Here's a patch that lets you run in 1:1 mode if LIBPTHREAD_SYSTEM_SCOPE is defined in the environment. I'm not stuck on its name, so feel free to suggest something else. http://people.freebsd.org/~deischen/kse/libpthread.diffs Warning (*), you can still force 1:1 mode if you build the library with -DSYSTEM_SCOPE_ONLY, so be sure to remove this when rebuilding libpthread. (*) I think it's still useful for archs that don't run in M:N yet. -- Dan Eischen
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