Hello,
I try to use inline in the objective of using a c function present in a dynamic lib (.so), which uses a static lib (.a).
Suppose libyourlib contains a function called 'multiply' which takes 2 arguments of type int and returns a int. You could access it with Inline::C as follows:
use Inline C => Config => LIBS => '-L/path/to/the_static_lib -lyourlib';
use Inline C => <<'EOC';
#include "yourlib.h"
int wrap_multiply(int a, int b) { return multiply(a,b); }
EOC
my $x = 17; my $y = 123;
print wrap_multiply($x, $y);
__END__
And, so long as libyourlib.so was able to be found, that Inline script should work fine (typing errors aside :-).
For other (more complex) return and argument types, things might not be so simple.
Take a good look through 'perldoc Inline::C-Cookbook', 'perldoc perlapi', and 'perldoc perlclib'.
What you'll probably be doing is mostly writing "wrapper" functions for the functions in your library.
Cheers, Rob