On Jun 22, 2018, at 4:09 PM, lille stor <lille.s...@gmx.com> wrote:
>
> I tried compile the C++ program using "mpic++" like you suggested but
> unfortunately g++ still throws the same errror
> ("/home/dummy/openmpi/build/lib/libopen-pal.so.20: undefined reference to
> pthread_atfork").
>
> I suspect that the problem maybe to the fact that the C++ program does not
> use directly Open MPI library but through another library (hence the
> parameter "-Wl,-rpath-link,/home/dummy/openmpi/build/lib" when compiling it),
> therefore one cannot pass the usual parameters
> "-L/home/dummy/openmpi/build/lib -lmpi" to g++. To summarize the dependency
> flow: program -> library -> Open MPI library.
If your program uses mpic++ instead of g++, then mpic++ should add all the
relevant parameters to compile an Open MPI program (including, if necessary,
-pthread or -lpthread).
What does "mpic++ --showme" show?
Can you compile a simple C or C++ MPI program manually? (using mpicc / mpic++,
without going through the secondary program)
--
Jeff Squyres
jsquy...@cisco.com
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