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From: Patrick Jessee (pj_at_[hidden])
Date: 2006-11-20 14:54:43


Hello. I'm wondering if anyone knows of a way to get OpenMPI to compile
shared libraries without hard-coding the installation directory in
them. After compiling and installing OpenMPI, the shared libraries have
the installation libraries hard-coded in them. For instance:

$ ldd libmpi.so
        liborte.so.0 =>
/usr/local/fluent/develop/multiport4.4/packages/lnamd64/openmpi/openmpi-1.1.2/lib/liborte.so.0
(0x0000002a956ea000)
        libnsl.so.1 => /lib64/libnsl.so.1 (0x0000002a95852000)
        libutil.so.1 => /lib64/libutil.so.1 (0x0000002a95968000)
        libm.so.6 => /lib64/tls/libm.so.6 (0x0000002a95a6c000)
        libpthread.so.0 => /lib64/tls/libpthread.so.0 (0x0000002a95bc4000)
        libc.so.6 => /lib64/tls/libc.so.6 (0x0000002a95cd8000)
        libopal.so.0 =>
/usr/local/fluent/develop/multiport4.4/packages/lnamd64/openmpi/openmpi-1.1.2/lib/libopal.so.0
(0x0000002a95f00000)
        /lib64/ld-linux-x86-64.so.2 (0x000000552aaaa000)
        libdl.so.2 => /lib64/libdl.so.2 (0x0000002a9605a000)

In the above,
"/usr/local/fluent/develop/multiport4.4/packages/lnamd64/openmpi/openmpi-1.1.2/lib"
is hardcoded into libmpi.so using --rpath when libmpi.so is compiled.

This is problematic because the installation cannot be moved after it is
installed. It is often useful to compile/install libraries on one
machine and then move the libraries to a different location on other
machines (of course, LD_LIBRARY_PATH or some means then needs to be used
to pick up libs are runtime). This relocation is also useful when
redistributing the MPI installation with an application. The hard-coded
paths prohibit this.

I've tried to modify the "--rpath" argument in libtool and
opal/libltdl/libtool, but have not gotten this to work.

Has anyone else had experience with this? (I'm building OpenMPI 1.1.2
on linux x86_64.) Thanks in advance for any potential help.

Regards,

-Patrick