Limiting the exported symols in a shared library

Limiting the exported symols in a shared library

[Barry Leslie]

Hi,

I want to create a shared lib and limit the symbols exported from it to the
functions specified in an api list. I don't want all the global symbols to
be visible. 

On many platforms this is done simply by listing the symbols in a file and
then passing the file name in as a command line argument. For example on AIX
you use -bE:api.exports and on Sun you use -M api.exports.

What is the equivalent for the linker on Linux?

I tried --retain-symbols-file api.exports but all the global variables and
functions were still visible when I did a 'nm -g mylib.so'.

Can anybody help me out here?

Thanks,
    Barry

RE: Limiting the exported symols in a shared library

[Moshe Libenson]

For the GNU linker it's --version-script
Read about it hear

http://www.gnu.org/manual/ld-2.9.1/html_mono/ld.html#SEC25

Moshe Libenson
moshe@libenson.org


-----Original Message-----
From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org] On
Behalf Of Barry Leslie
Sent: Friday, October 11, 2002 9:16 PM
To: gcc-help@gcc.gnu.org
Subject: Limiting the exported symols in a shared library

Hi,

I want to create a shared lib and limit the symbols exported from it to
the
functions specified in an api list. I don't want all the global symbols
to
be visible. 

On many platforms this is done simply by listing the symbols in a file
and
then passing the file name in as a command line argument. For example on
AIX
you use -bE:api.exports and on Sun you use -M api.exports.

What is the equivalent for the linker on Linux?

I tried --retain-symbols-file api.exports but all the global variables
and
functions were still visible when I did a 'nm -g mylib.so'.

Can anybody help me out here?

Thanks,
    Barry