Philipp, You are right that libtool doesn't need to put "/usr/lib64/libltdl.so" in the compiler command line as the *only* solution. I only meant that doing so was preferred over the observed behavior of putting the full path of a library for the wrong architecture. You are correct that passing "-lltdl" to the compiler unchanged would also be correct, but that is NOT what libtool was doing.
What I observed is that make passed "-lltdl" to libtool, but libtool passed "/usr/lib/libltdl.so" to the compiler *instead* of passing -lltdl. You can see the libtool command and the compiler command it invoked in http://www.open-mpi.org/community/lists/devel/2015/02/16881.php Even if libtool had passed *both* "/usr/lib/libltdl.so" and "-lltdl" this would still have been erroneous because the explicitly named .so is for the wrong architecture. That is why the error message is /usr/lib/libltdl.so: could not read symbols: File in wrong format Rather than something about unresolved symbols that should have been in libltdl. I should note that I saw this on both a SLES-11.1 system and a Scientific Linux 5.5 system, but in both cases only with Portland Group compilers (Gnu, Intel, PathScale and Open64 compilers worked fine). So, this is not a SUSE-specific issue. -Paul On Thu, Feb 12, 2015 at 11:49 PM, Philipp Thomas <p...@suse.de> wrote: > Hi Paul, > sorry for chiming in so late, but this list is on low priority for me at > the > moment. > > * Paul Hargrove (phhargr...@lbl.gov) [20150202 22:58]: > > > is erroneous is that /usr/lib contains 32-bit libs (and target is > 64-bit). > > Therefore libtool should have replaced -lltdl with /usr/lib64/libltdl.so > > It doesn't need to do so. If only -lltdl is passed, the linker will by > default search /usr/lib64. As I'm SUSE's maintainer of libtool (and openMPI > :) maintainer, I'll gladly try to help with any issue. > > Philipp > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/02/16983.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
