OK, so here's what I did.

1. Downloaded, configured and compiled libgmp 4.2.1 using gcc 4.0.1 (the latest version from XCode).

2. "make check" on libgmp. No errors.

3. Installed libgmp (make install), again, no errors.

4. Tried to install Math::GMP using CPAN. This fails:

Checking if your kit is complete...
Looks good
Writing Makefile for Math::GMP
cp lib/Math/GMP.pm blib/lib/Math/GMP.pm
AutoSplitting blib/lib/Math/GMP.pm (blib/lib/auto/Math/GMP)
/usr/local/bin/perl /usr/local/lib/perl5/5.8.8/ExtUtils/xsubpp  -typem
+ap /usr/local/lib/perl5/5.8.8/ExtUtils/typemap -typemap typemap  GMP.
+xs > GMP.xsc && mv GMP.xsc GMP.c
gcc -c   -fno-common -DPERL_DARWIN -no-cpp-precomp -fno-strict-aliasin
+g -pipe -Wdeclaration-after-statement -I/usr/local/include -I/opt/loc
+al/include -O3   -DVERSION=\"2.04\" -DXS_VERSION=\"2.04\"  "-I/usr/lo
+cal/lib/perl5/5.8.8/darwin-2level/CORE"   GMP.c
Running Mkbootstrap for Math::GMP ()
chmod 644 GMP.bs
rm -f blib/arch/auto/Math/GMP/GMP.bundle
env MACOSX_DEPLOYMENT_TARGET=10.3 cc  -bundle -undefined dynamic_looku
+p -L/usr/local/lib -L/opt/local/lib GMP.o  -o blib/arch/auto/Math/GMP
+/GMP.bundle      \
   -lgmp        \
  
/usr/bin/ld: /usr/local/lib/libgmp.a(mode1o.o) has local relocation en
+tries in non-writable section (__TEXT,__text)
collect2: ld returned 1 exit status
make: *** [blib/arch/auto/Math/GMP/GMP.bundle] Error 1
  /usr/bin/make  -- NOT OK
Running make test
  Can't test without successful make
Running make install
  make had returned bad status, install seems impossible
Failed during this command:
  CHIPT/Math-GMP-2.04.tar.gz                   : make NO
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5. Back to libgmp, make distclean

6. Switch gcc to version 3.3

7. Repeat configure/make cycle (no errors)

8. make check (no errors)

9. Tried to install Math::GMP. Same result as above.

Please feel free to contact me if you need any further information. I'll be glad to help.

Thanks,

There are some ideas on things to try in the thread called "how do I force PIC code in libgmp.a on MacOSX (Intel)...?" beginning at http://swox.com/list-archives/gmp-bugs/2006-April/000341.html. Unfortunately it doesn't seem to resolve the problem - beyond the suggestion that you revert to GMP-4.1.4 (which should be quite adequate for your needs ... assuming that solution does, in fact, work).

I'm puzzled by the reference to 'modelo.o' (which I can't find anywhere in any of my GMP builds), and by the 'cc' (as opposed to 'gcc') call you report just before the failure occurs. I wonder whether the 'cc' call might have something to do with the error, though the thread I referred to above suggests that it has more to do with the 'bundle' switch ... and I have no idea what that switch does, or why it is being invoked.

My only other idea is to build GMP as a shared library (./configure --disable-static --enable-shared) .... and, if linking to the import lib still produces the same error, then amend the Math::GMP source so that it links directly to the GMP '.so'. (I have no idea whether that will help in this instance ... it's just something I would try.)

Cheers,
Rob

Hi Rob,

thanks for your suggestions. I tried both building libgmp as a shared library (which didn't solve the problem) and reverting to libgmp 4.1.4 (which did).

The reference to cc shouldn't be a problem, as /usr/bin/cc is a logical link to /usr/bin/gcc-4.0 (as is /usr/bin/gcc).

The -bundle switch tells ld to create a bundle file:

       -bundle
              Produce a Mach-O bundle format file.  The headers are pl
+aced  in
              the first segment.  All sections are placed in their pro
+per seg-
              ments and they are padded to the segment alignment.  Thi
+s has  a
              file type of MH_BUNDLE.
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Thank you very much for your helpful suggestions!

Regards,

  Peter.