Re: gc sections and .eh_frame

[Eric Botcazou <ebotcazou at adacore dot com>]

> > I think it doesn't work (alone) either, because you unconditionally mark
> > all .gcc_except_table* sections, which themselves point to the functions.
>
> That doesn't make any difference, because .gcc_except_table* is marked
> via KEEP() in the linker script.  So I don't think you need anything
> more than the patch I posted.

That's not quite true, .gcc_except_table is indeed marked as KEEP, but 
not .gcc_except_table.* :-)

That's the crux of the mechanism: an unpatched (non broken) compiler will only 
emit .gcc_except_table.  But a patched compiler (i.e. the AdaCore compiler or 
the FSF compiler + http://gcc.gnu.org/ml/gcc-patches/2004-03/msg01433.html) 
will emit .gcc_except_table.* with -ffunction-sections, making it possible to 
have a working --gc-sections for languages with EH.

-- 
Eric Botcazou