Gcc 3.3.2 problem: libgcc_s.so.1 not found

Question

I am trying to compile a perl module (Math::GMP) on a Solaris 8 platform. We have gcc 3.3.2 installed, and everything appears to go well until I try the following:
% ldd blib/arch/auto/Math/GMP/GMP.so
    libgmp.so.3 => /usr/local/lib/libgmp.so.3
    libc.so.1 => /usr/lib/libc.so.1
    libgcc_s.so.1 => (file not found)
    libdl.so.1 => /usr/lib/libdl.so.1
    /usr/platform/SUNW,Ultra-5_10/lib/libc_psr.so.1
I have confirmed that /usr/local/lib/libgcc_s.so.1 exists, so I don't understand what is wrong. Any clues?

Answer 1

It isn't entierly clear if the libgcc_s.so.1 dependancy comes directly from "GMP.so" or indirectly from
"libgmp.so.3".
You can check that with the dump command, looking at the recorded "SONAME" dependencies:
dump -Lv blib/arch/auto/Math/GMP/GMP.so
and
dump -Lv /usr/local/lib/libgmp.so.3
While your looking at the output from "dump", have a look at the recorded runtime shared library path, too.
(the "RUNPATH" or "RPATH" entries). Apparently one of "GMP.so" or "libgmp.so.3" depends on libgcc_s.so.1
but does not have it's runtime shared library path set to include "/usr/local/lib".
The fix is to link the bad shared library with the option "-R /usr/local/lib" (assuming your gcc is configured to
use the Sun linker).