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Re: mpich FTBFS on sh4: MPIUI_Thread TLS definition mismatches tbss

Drew Parsons <dparsons@debian.org> writes:

> The link error suggests 2 different versions of MPIUI_Thread are used. 
> But I can only see a definition in src/util/thread/mpiu_thread.c.
> src/mpi/comm does not refer to it, and comm_rank.c does not use any
> MPIU object. So the error message doesn't make sense to me.

comm_rank's reference to MPIUI_Thread is also present on at least amd64,
and presumably due to some macro that (directly or indirectly) calls
MPIU_THREADPRIV_FIELD.  However, it's not clear why multithreaded build
settings would be in effect for mpiu_thread but not also comm_rank.  (It
looks like MPIUI_Thread's thread-locality is conditional on
MPICH_IS_THREADED, which mpichconf.h defines centrally.)

I don't have time to dig deeper, but hope that brief analysis helps.

Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu

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