Re: NEED_REGISTER_FRAME_INFO can be replaced by -static-libgcc

[Christian Franke]

Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> Christian Franke wrote:
>    
> > According to 'gcc -dumpspecs' of Cygwin gcc 4.3.4-3, options '-u
> > ___[de]register_frame_info' are always passed to the linker if
> > -static-libgcc is not specified. This is Cygwin and MinGW specific: In
> > the exe startup code these symbols are loaded only if present, so the
> > DLL must be forced to load first.
> >
> > As a consequence, the symbols are also set undefined when the GRUB
> > pre-*.o files are generated with 'ld -r'.
> >
> > The attached patch works for me with the bzr revision preceding the
> > NEED_REGISTER_FRAME_INFO fix.
> >
> >      
> Doesn't it risk linking e.g. __bswapsi2 into every module which uses it
> during partial link? It would increase module size on RISC
>    

Partial linking with '-Wl,-r' does never pull any code from libraries. 
Specifying '-lgcc' has no effect in this case.

Cannot test this on RISC, it is at least true on i686-linux, -freebsd 
and -cygwin.

--
Regards,
Christian Franke