Also, I recommend you do not name your library libmpi.so, since this name is already used by Open MPI
Cheers, Gilles On Saturday, June 25, 2016, Jeff Squyres (jsquyres) <jsquy...@cisco.com> wrote: > On Jun 24, 2016, at 4:39 PM, Richard C. Wagner <drsav...@q.com > <javascript:;>> wrote: > > > > Then I try to compile the library file in 32-bit mode. The first > command is: > > > > mpicc -fPIC -m32 -c libtest.c > > > > Then the second is: > > > > mpicc -shared -m32 -o libmpi.so libtest.o > > > > As you can see below, compiling the object file works. But the second > command, linking libtest.o and writing the shared library, fails. Can you > see what's wrong? > > > > rwagner@tuxcfd10:~/engrhome/CSU/LibTests$ mpicc -fPIC -m32 -c libtest.c > > rwagner@tuxcfd10:~/engrhome/CSU/LibTests$ mpicc -shared -m32 -o > libmpi.so libtest.o > > /usr/bin/ld: skipping incompatible /usr//lib/libmpi.so when searching > for -lmpi > > /usr/bin/ld: skipping incompatible /usr/lib/openmpi/lib/libmpi.so when > searching for -lmpi > > /usr/bin/ld: skipping incompatible > /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../libmpi.so when searching for > -lmpi > > /usr/bin/ld: skipping incompatible //usr/lib/libmpi.so when searching > for -lmpi > > /usr/bin/ld: cannot find -lmpi > > /usr/bin/ld: cannot find -lhwloc > > collect2: error: ld returned 1 exit status > > > > And for added info, these two commands succeed when I don't use the -m32 > switch. The library comes out as you'd expect it to, but as a 64-bit > version. > > That means that the Open MPI installed in /usr/lib and /usr/lib/openmpi is > a 64 bit version. > > You need to install a 32 bit version of Open MPI, and compile/link against > that one. > > -- > Jeff Squyres > jsquy...@cisco.com <javascript:;> > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > users mailing list > us...@open-mpi.org <javascript:;> > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/06/29547.php >
