Re: [ANNOUNCE] Native POSIX Thread Library 0.1

Bill Davidsen
2002-09-20T17:19:12Z

On Fri, 20 Sep 2002, Jakub Jelinek wrote:

> On Fri, Sep 20, 2002 at 11:43:15AM -0400, Bill Davidsen wrote:
> > > Unless major flaws in the design are found this code is intended to
> > > become the standard POSIX thread library on Linux system and it will
> > > be included in the GNU C library distribution.
> >
> > If the comment that this doesn't work with the stable kernel is correct, I
> > consider that a pretty major flaw. Unlike the kernel and NGPT which are
> > developed using an open source model with lots of eyes on the WIP, this
> > was done and then released whole with the decision to include it in the
> > standard library already made. Having any part of glibc not work with the
> > current stable kernel doesn't seem like such a hot idea, honestly.
>
> glibc supports .note.ABI-tag notes for libraries, so there is no problem
> with having NPTL libpthread.so.0 --enable-kernel=2.5.36 in say
> /lib/i686/libpthread.so.0 and linuxthreads --enable-kernel=2.2.1 in
> /lib/libpthread.so.0. The dynamic linker will then choose based
> on currently running kernel.
> (well, ATM because of libc tsd DL_ERROR --without-tls ld.so cannot be used
> with --with-tls libs and vice versa, but that is beeing worked on).
>
> That's similar to non-FLOATING_STACK and FLOATING_STACK linuxthreads,
> the latter can be used with 2.4.8+ or something kernels on IA-32.

Good point, I had forgotten that! It will be somewhat large having both,
but presumably someone who really worried about it would build a subset.

--
bill davidsen <davidsen@tmr.com>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.