pthread in Cygwin? (attempt to build ghostscript 6.5)

pthread in Cygwin? (attempt to build ghostscript 6.5)

[Wei Ku]

Hello,

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.  Any
help is appreciated.

Wei Ku


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Re: pthread in Cygwin? (attempt to build ghostscript 6.5)

[Robert Collins]

----- Original Message -----
From: "Wei Ku" <weiku@physics.ucdavis.edu>
To: <cygwin@cygwin.com>
Sent: Friday, March 30, 2001 11:37 AM
Subject: pthread in Cygwin? (attempt to build ghostscript 6.5)


> Hello,
>
> 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.
Any
> help is appreciated.
>
> Wei Ku
>

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.

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.

Rob


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Re: pthread in Cygwin? (attempt to build ghostscript 6.5)

[Robert Collins]

----- Original Message -----
From: "Wei Ku" <weiku@physics.ucdavis.edu>
To: "Robert Collins" <robert.collins@itdomain.com.au>;
<cygwin@cygwin.com>
Sent: Friday, March 30, 2001 12:53 PM
Subject: Re: pthread in Cygwin? (attempt to build ghostscript 6.5)


>
> Thanks for the useful information.

No probs. I'm the pthreads maintainer (woohoo a Title!) for cygwin as of
last week :]

> > 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
>
>
There is no libpthread.a The functions are exported from libcygwin.a and
implemented in cygwin1.dll

Rob


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Re: pthread in Cygwin? (attempt to build ghostscript 6.5)

[Wei Ku]

> > 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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RE: pthread in Cygwin? (attempt to build ghostscript 6.5)

[Norman Vine]

Wei Ku writes:
>
>In the last step of building ghostscript 6.5 (after some minor 
>modifications in a few places) I encountered the following error message:

Here is a howto for building 6.62
http://www.vso.cape.com/~nhv/files/cygwin/gs6.62/

This uses the Cygwin Image Dll's

Cheers

Norman Vine



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