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From: j@bonnie.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: object files for shared libraries
Date: 17 Aug 1995 10:53:16 +0200
Organization: Private U**x site, Dresden.
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Message-ID: <40v01s$8u6@bonnie.tcd-dresden.de>
References: <CFS.95Aug16103006@numero1.mat.puc.cl>
Reply-To: joerg_wunsch@uriah.heep.sax.de
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Cristian Ferretti <cfs@numero1.mat.puc.cl> wrote:
> I have been looking for shared libraries preparation in lib sources.
>Seems like you should compile with -fpic and -DBSDSHLIB and later link with
>ld -B shareable -o libfoo.so.M.M $(OBJECTS).
> But sometimes after compiling ld -x -r is run on each object file
>(ld manual says its for striping unexported symbols).
>
>May someone point why and when is this necesary (or if it exists point to the
>documentation)?
I think it's to strip things like the `gcc_compiled' and other unused
information out of the resulting object. You don't need it, but it
saves space.
>Also if possible, may someone compare FreeBSD shared libraries with other
>unixes implementation? At first they look like the ones in SunOS 4.
LD(1) FreeBSD System Manager's Manual LD(1)
NAME
ld - link editor
...
HISTORY
The shared library model employed by ld appeared first in SunOS 4.0
I think Paul Kranenburg has re-implemented it after the SunOS 4 model.
--
cheers, J"org private: joerg_wunsch@uriah.heep.sax.de
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)