Re: [MiNT] wide-char and g++

["Helmut Karlowski" <helmut.karlowski@ish.de>]

Eero Tamminen, 17.04.2013 12:45:47:

> Hi,
>
> On keskiviikko 17 huhtikuu 2013, Helmut Karlowski wrote:
> > Andreas Schwab, 17.04.2013 11:16:34:
> > > "Helmut Karlowski" <helmut.karlowski@ish.de> writes:
> > >> Why doesn't it find the reference when they are the same?
> > >
> > > Because nothing defines it.
> >
> > libc does.
>
> C "wcslen" and your C++ "wcslen" have completely different symbol
> names.  C++ one is mangled, so C one in libc doesn't match it.
>
> It may be easier if you use "nm" on your C++ compiled object files
> to see what are the actual symbol names for the functions included
> in it.

When I compile this:


extern "C"
{
extern int wcslen(const int * s);
}
int xwcslen(int const* s)
{
   return wcslen( (const int*)s);
}

I get:


  .file "wcs.cpp"
  .text
.globl __Z7xwcslenPKi
  .def  __Z7xwcslenPKi; .scl  2;  .type 32; .endef
__Z7xwcslenPKi:
LFB0:
  pushl %ebp
LCFI0:
  movl  %esp, %ebp
LCFI1:
  subl  $24, %esp
LCFI2:
  movl  8(%ebp), %eax
  movl  %eax, (%esp)
  call  _wcslen
  leave
LCFI3:
  ret
LFE0:
  .def  _wcslen;  .scl  2;  .type 32; .endef

So there would be no recursion.

--
Helmut Karlowski