[distcc] Problem between RHEL3 Update 7 and previous updates

[Martin Pool]

On  2 Aug 2006, raja at ece.gatech.edu wrote:
> Hi,
> 
> When i use distcc with one machine having RHEL3 update 7 and another one
> having older update of RHEL3, we are getting the following error when we
> do a dlopen on the generated library file.
> 
> undefined symbol:   __gthrw_pthread_create(unsigned long*,
> __pthread_attr_s const*, void* (*)(void*), void*)'
> 
> We dont have this problem, when the distcc federation have machines with
> only RHEL update 7.
> 
> This is because, RHEL3 update 7 moved from
> glibc-2.3.2-95.37 => glibc-2.3.2-95.39
> 
> There is  "#define __gthrw_pthread_create ..." (gthr-posix.h) in
> glibc-2.3.2-95.39 which is present in RHEL3 update 7.
> 
> Since distcc does all preprocessing in the local machine, i was wondering
> how this could create a problem.

A change in only the headers and library should, as you say, be
localized only to the client machine.  Perhaps you actually just have an
old object file around in your build directory?

Sometimes compilers emit dependencies to different internal symbols when
they're upgraded.

Is it really just that single package change that causes or solves the
problem?

-- 
Martin