#19610: Fix dependencies on PARI
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Reporter: jdemeyer | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: cython | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/fix_dependencies_on_pari| 5d0e4d30588ab0f13bfc0770d2b4b407d7580035
Dependencies: | Stopgaps:
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Comment (by leif):
Replying to [comment:11 jdemeyer]:
> Replying to [comment:5 leif]:
> > Ok, I see, in `sage/libs/pari/paridecl.pxd`, there's (still)
> > {{{
> > #!python
> > # distutils: libraries = gmp pari
> > }}}
> >
> > Do we really need `gmp` there as well?
>
> Yes, because PARI needs gmp:
> {{{
> $ ldd local/lib/libpari.so
> linux-vdso.so.1 (0x00007fffaa5fe000)
> libc.so.6 => /lib64/libc.so.6 (0x00007fb572c81000)
> libm.so.6 => /lib64/libm.so.6 (0x00007fb572992000)
> libgmp.so.16 => /usr/local/src/sage-git/local/lib/libgmp.so.16
(0x00007fb57271d000)
> libdl.so.2 => /lib64/libdl.so.2 (0x00007fb572519000)
> /lib64/ld-linux-x86-64.so.2 (0x00007fb5738fd000)
> }}}
Well, of course '''PARI''' needs GMP, but not (necessarily) modules using
PARI; that's a transitive dependency. Unless you link statically, you
don't have to explicitly specify GMP (and you shouldn't), because the
dependency of PARI on GMP is recorded in `libpari.so`.
If GMP changes, PARI will get rebuilt, and hence also modules depending on
PARI.
The reason `libgmp` was listed '''twice''' (and different versions of it!)
[comment:ticket:19589:18 in your ldd output] is exactly such overlinking.
--
Ticket URL: <http://trac.sagemath.org/ticket/19610#comment:12>
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