Subject: Re: Threading problems
To: Johnny C. Lam <>
From: Nathan J. Williams <>
List: tech-kern
Date: 11/24/2004 11:15:20
"Johnny C. Lam" <> writes:

> This is the solution I am currently implementing for pkgsrc.  I need
> two issues to be clarified before I start modifying packages:
> (1) I have a shared library that dlopens shared modules that may be
>     potentially link with "-pthread".  Should this shared library be
>     linked with "-pthread"?


> (2) I have an application that links against this above shared library.
>     Does this application need to be linked with "-pthread"?


As before, I would counsel caution as to whether the modules being
opened should, in fact, be linked against libpthread. This essentially
becomes "do they call pthread_create()"? For the applications that
have been listed earlier in this thread, is it possible to enumerate
the modules that link against libpthread and check them for this
property? I fear that a module is being linked against libpthread to
satisfy the module's attempts at thread-safety in the presence of a
threaded app, but the app isn't threaded either.

        - Nathan