I get ugly warnings (they look dangerous to me) when I compile boost/regex on AIX and HP-UX with gcc.
I've never seen anything quite like that before - those tables are immutable, so multiple copies won't hurt if that's what's happening - but you really need to contact a gcc newsgroup and find out what those messages actually mean.
Thanks,
John Maddock.
While searching for this warning message, I found for example:
http://lists.boost.org/MailArchives/boost-users/msg03526.php http://mail.python.org/pipermail/c++-sig/2003-May/004138.html http://gcc.gnu.org/ml/gcc/1998-04/msg00819.html
So it seems, that weak symbols/weak linking does not work with all object file formats (only with ELF?).
Hmmm, the thing is I can't really work around this: the regex lib has a bunch of class-template-specific static data (basically pointers to member functions) that it needs to be able to dispatch to the correct matcher. The warning message is wrong for several reasons IMO: 1) the function isn't inline. 2) the initialiser list can not be omitted because the data is *const*. 3) the semantics of the function should be OK, since the shared data is const and immutable, so multiple copies are OK. I guess you could suppress the warning by removing the "static" declarator for these problem platforms, but it's a fix that really should not be required, otherwise just ignore the warnings if that's acceptable to you... John