Hi,
This is slightly off-topic, for which I apologise. It's just that I
learned about symbol versioning during my NM process, and nobody outside
Debian seems to understand what it is. :-(
I have a library, which I want to package for Debian. I felt it would
be a good idea to use symbol versioning, since most of my programs (and
in some cases other libraries) use it. The library is written in C++,
which seems to be a slight problem. AFAIU the linker should be able to
handle it, but I don't see how. Let's start with the problem in more
detail:
I want a symbol-versioned library, where most symbols are of one
version, but some are of a different version.
I started small, and made a version script to give all symbols the same
version:
SHEVEK_1 {
global:
*;
};
This works fine. When I use objdump -T library.so, I can see all my
symbols with version SHEVEK_1.
Then I tried to give the whole shevek::fd class a different version by
adding:
SHEVEK_2 {
global:
shevek::fd::*;
};
(and some variations.) That didn't work at all: it defines the version:
00000000 g DO *ABS* 00000000 SHEVEK_2 SHEVEK_2
But no symbol actually uses it.
Inserting the mangled name does work (if I do it before the SHEVEK_1
version, which makes sense). However, I would like to use the symbols
from my code, and not the things gcc makes of them. Especially because
I never know if gcc doesn't change the way it mangles in the future.
So the question is: is that possible, and if so, how?
Any other comments on this approach (or on anything else ;-) ) are also
welcome.
Thanks,
Bas
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