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Re: shared library, init
- To: ROGER dot K dot WELLS at saic dot com
- Subject: Re: shared library, init
- From: Marc Espie <espie at quatramaran dot ens dot fr>
- Date: Sat, 22 Sep 2001 01:50:47 +0200
- Cc: gcc at gcc dot gnu dot org
- Organization: Ecole Normale Superieure (quatramaran)
In article <email@example.com> you write:
>When I use the linker flag, -Wl,-init, the linker complains that my _init()
>conflicts with one in crti.o. When I give the -init flag the name of a
>function that I supply it is ignored. Can someone advise me of the correct
>syntax to establish a shared library initialization (& termination)
In the gcc context, assuming this is C, see attribute constructor and
destructor in the gcc documentation. For C++, this is even more trivial.
This assumes you're running gcc on a platform with full support for
this (which is either provided directly by ld + ELF or by collect2 usually).
Note that the semantics are a bit hard to guarantee and check: it is often
unknown in which order several initialisation routines will be run (and how
many times), and it is even harder to be sure that a finalization routine
will actually be run...