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Reply-To:	"Wei Ku" <weiku AT mailaps DOT org>
From:	"Wei Ku" <weiku AT physics DOT ucdavis DOT edu>
To:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>, <cygwin AT cygwin DOT com>
References:	<002501c0b8b9$f5438f80$822aeda9 AT ucdavis DOT edu> <00e601c0b8c3$dfd0f200$0200a8c0 AT lifelesswks>
Subject:	Re: pthread in Cygwin? (attempt to build ghostscript 6.5)
Date:	Thu, 29 Mar 2001 18:53:54 -0800
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> > In the last step of building ghostscript 6.5 (after some minor
> modifications
> > in a few places) I encountered the following error message:
> >
> > (while gcc -fno-common -o ./bin/gs ./obj/gs.o ./obj/gp_getnv.o ...)
> >
> > ./obj/gp_psync.o(.text+0x49):gp_psync.c: undefined reference to
> > `pthread_cond_init'
> > ./obj/gp_psync.o(.text+0x7a):gp_psync.c: undefined reference to
> > `pthread_cond_destroy'
> > ./obj/gp_psync.o(.text+0xda):gp_psync.c: undefined reference to
> > `pthread_cond_wait'
> > ./obj/gp_psync.o(.text+0x148):gp_psync.c: undefined reference to
> > `pthread_cond_signal'
> > ./obj/gp_psync.o(.text+0x28e):gp_psync.c: undefined reference to
> > `pthread_attr_setdetachstate'
> >
> > I have /usr/include/pthread.h but can not find libpthread.a anywhere.

> Condition variations aren't implemented in the current 1.1.8-2 release
> of cygwin. Try the latest snapshot.
>
> I've implemented pthread_attr_setdetachstate, but I think it's bundled
> in with a patch that affects newlib so it's not available yet. See
> http://sources.redhat.com/ml/cygwin/2001-03/msg01202.html for a clean
> workaround.

Thanks for the useful information.

> Note: if your "minor" modificationsincluded defining macros or
> prototypes to replace system functions that aren't present, I'm not
> surprised you got these link errors.

No, I carefully try to avoid that sort of modification.  The puzzle is that
these functions are in the header files but the corresponding library file
is missing.

Wei


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