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Re: gcc 3.3.3, const symbols and shared libraries


Norton Allen wrote:

Gerrit P. Haase wrote:

Norton Allen wrote:

I have seen the discussions at

http://sourceware.org/ml/cygwin/2004-09/msg01101.html

referenced at

http://cygwin.com/ml/cygwin/2005-03/msg00048.html

regarding gcc 3.3.3's placement of const symbols into
rdata which then cannot be properly initialized.
This problem seems pretty fundamental. Can anyone
tell me whether there has been any followup to
this? Is it considered a cygwin problem or a
gcc problem? Has it been addressed in 3.4.1?
What are developers doing? Going back to 3.3.1?



The rule is to not use const symbols in shared libraries if they are not really const;)


What do you mean by "really?" These are const from
the standpoint of "defined once and never changed
thereafter," but they are not finally defined until
the link against shared libraries.

It's currently an issue because it requires changes
to quite a few packages. In the past week, I had to
remove const declarations from glib-2.6.3 and
gtk+-2.6.4 to get them to compile. Are these changes
that are uniquely required by cygwin, or are these
going to be required for all gcc platforms?

-Norton


I needed to apply these changes too (I'm the maintainer of glib2),
I think it is required for those platforms coming with gcc in
question as default compiler, yes.  However, only parts where
libpopt is involved where affected, the usual way oppt was used
doesn't work, at least with Cygwin.


Gerrit -- =^..^=

Action Soccer: http://www.action-soccer.de/?lv=de&id=505
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