CODEWITHSUNDEEP
perlshared-librariescpanlanguage-bindinglocallib
nponeccop
nponeccop

Reputation: 13677

Using local::lib with 3-rd party shared .so libraries

I have a Perl library that consists of a C library in a binary form (.so file) and sources for Perl bindings for that library (Makefile.PL etc).

All I need is an ability to run Perl samples shipped with the library. I'd like to avoid installing anything globally or changing system-wide configs.

So I created a special user and I want everything to run inside the home dir. Changing environment and adding files/folders in the homedir is fine of course.

I already have local::lib and various CPAN helpers installed system-wide (cpan, cpanp and cpanm so I can use them if they are of any help.

I could create ~/lib and put .so there, or put it somewhere inside ~/perl5.

The question is how to make the shared C library available to the Perl bindings during compilation and during runtime. It seems I need LD_LIBRARY_PATH and LDFLAGS environment variables but I'm not sure how to use them together with local::lib.

Moreover the library comes named as foo.1.2.3.4.so but linker wants -lfoo. Am I supposed to create foo.so -> foo.1.2.3.4.so symlink myself?

Upd:

The relevant part of generated Makefile:

    LD_RUN_PATH="$(LD_RUN_PATH)" $(LD)  $(LDDLFLAGS) $(LDFROM) $(OTHERLDFLAGS) -o $@ $(MYEXTLIB)    \
      $(PERL_ARCHIVE) $(LDLOADLIBS) $(PERL_ARCHIVE_AFTER) $(EXPORT_LIST)    \
      $(INST_DYNAMIC_FIX)

Patching LDDLFLAGS to include an extra -L switch works but feels dirty.

Upvotes: 1

Views: 110

Answers (0)

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