how to create shared libraries with gcc/g++ and ld

by Ronald van Lo » Fri, 23 Jul 1993 18:23:33

Can anyone explain to me how I can create shared libraries for Linux ? I am
aware of the -fpic and -fPIC flags of gcc, as well as the -shared option to
the linker, but can anyone give me an example of actual use ? What's the trick ?

Thanks! (Please CC: me a copy as well as follow-upping)
--
Ronald van Loon | In theory, there is no difference

3DCV Group, Utrecht |
The Netherlands | In practice however, there is.

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1. Shared libraries and GNU GCC using gas and gnu ld.

After transferring all that GNU software to my computer and after
installing the GNU compiler, i wanted to install G++. Finally
i got it to compile on my 386 running ESIX. In order to make
it run best, the G++ people recommended using the GNU binutils,
which i did. You have to abandon COFF and use BSD style libraries.
I converted all my libs (including /usr/lib/libnsl_s). My problem
is now, that X programs do not compile any more because they can't
find the symbols that are defined in nsl_s! This appears to be
a shared library. I can think about two ways of getting my X soft-
ware to run with the GNU CC:
1. Convert nsl_s to non-shared format. How do i do this??
2. Maybe shared libs ARE supported in BSD style libs and i just
don't know how. libconvert and robotussin can convert libnsl_s.a
to BSD style (format). At link time however, the symbols defined
there are not there for gcc-ld.

Maybe somebody also know if InterViews from the X11R4 distr. tape
runs under Esix Sys/V X11R3 (when comes Esix X11R4 ???) using G++?

Thanks a lot

P.S. Post to me, i'll summarize, if xedit lets me.

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