Do ./configure --help and you'll see options for specifying the host and build target. You need to do that when cross-compiling.
On Oct 25, 2010, at 12:01 PM, saahil...@gmail.com wrote: > ---------- Forwarded message ---------- > From: saahil...@gmail.com > Date: Oct 25, 2010 11:26pm > Subject: Cross compiling for 32 bit from a 64 bit machine > To: us...@open-mpi.org > CC: > > > > Hello, > > I am a beginner using Open MPI to set up a simple Beowulf cluster of PCs > > for my Distributed Systems lab. My head node is my x86_64 architecture > > Fedora 12 machine. The rest of my nodes are i386 Fedora 13 machines. I > > understand that I need to compile Open MPI with CFLAGS=-m32 so that I can > > use -m32 flag to create a 32 bit compatible binary. I could not do this > > using yum install. So I am using the tarball for Open MPI 1.5. > > my configure command is as follows - > > > > ./configure --prefix=/home/wolf/openmpi/ CFLAGS=-m32 CXXFLAGS=-m32 > > FFLAGS=-m32 FCFLAGS=-m32 > > > > This works fine. However, while doing make I get the following errors - > > > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-preopen.o)' is incompatible > > with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-lt__alloc.o)' is incompatible > > with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-lt_dlloader.o)' is > > incompatible with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-lt_error.o)' is incompatible > > with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-ltdl.o)' is incompatible with > > i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlc_la-slist.o)' is incompatible > > with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(lt__strl.o)' is incompatible with i386 > > output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(libltdlcS.o)' is incompatible with i386 > > output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `../opal/libltdl/.libs/libltdlc.a(dlopen.o)' is incompatible with i386 > > output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `asm/.libs/libasm.a(atomic-asm.o)' is incompatible with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `event/.libs/libevent.a(signal.o)' is incompatible with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `event/.libs/libevent.a(epoll.o)' is incompatible with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `event/.libs/libevent.a(poll.o)' is incompatible with i386 output > > /usr/bin/ld: i386:x86-64 architecture of input file > > `event/.libs/libevent.a(select.o)' is incompatible with i386 output > > /usr/bin/ld: final link failed: Invalid operation > > collect2: ld returned 1 exit status > > make[2]: *** [libopen-pal.la] Error 1 > > make[2]: Leaving directory `/home/wolf/Downloads/openmpi-1.5/opal' > > make[1]: *** [all-recursive] Error 1 > > make[1]: Leaving directory `/home/wolf/Downloads/openmpi-1.5/opal' > > make: *** [all-recursive] Error 1 > > > > > > Any idea as to how to go around fixing this? Any help would be greatly > > regarded, since I'm supposed to meet a deadline, and half of my semester > > has been spent trying to get either LAM-MPI or Open MPI (which I was > > suggested I shift to) to work. > > Thank you very much. > > > > Regards, > > Saahil_______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
