Gilles, My initial thought is that libslurm probably does require linking libpthread, either for for linking pthread_* symbols, or for proper *operation* (such as thread-safe versions of functions which override weak definitions in libc).
If so, then neither omitting "-pthread" nor telling pgcc not to complain about "-pthread" is going to be a good solution. Instead the "-pthread" needs to be replaced by "-lpthread", or similar. -Paul On Mon, Jul 25, 2016 at 6:03 PM, Gilles Gouaillardet <gil...@rist.or.jp> wrote: > Folks, > > > This is a followup of a thread that initially started at > http://www.open-mpi.org/community/lists/users/2016/07/29635.php > > > The user is trying to build Open MPI with PGI compiler and > libslurm.la/libpmi.la support, and slurm was built with gcc compiler. > > > At first, it fails because the "-pthread" flag is pulled from > libslurm.la/libpmi.la, but this flag is not supported by PGI compilers. > > A workaround is to pass the -noswitcherror flag to the PGI compiler (so > the -pthread flag is discarded and a warning message is issued, but PGI > compiler does not fail). Unfortunatly, that does not work because libtool > does does not pass this flag to the PGI compiler. > > > Of course, one option is to tell the user to rebuild slurm with PGI, so > libslurm.la/libpmi.la do not have the "-pthread" flag. > > A nicer though arguable option is to hack libtool to silently drop the > "-pthread" flag with PGI compiler is used (i made a proof of concept, and > this is a two lines patch). > > An other cleaner option is to hack libtool so it pass -noswitcherror to > PGI compiler, but i do not know how to achieve this. > > > Any thoughts ? > > > Cheers > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2016/07/19278.php > -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
