Blackfin and version scripts

[Mike Frysinger]

On Tuesday, July 06, 2010 12:34:13 Kurt Roeckx wrote:
> On Mon, Jul 05, 2010 at 04:08:47PM -0400, Mike Frysinger wrote:
> > On Mon, Jul 5, 2010 at 12:50, Kurt Roeckx wrote:
> > > On Mon, Jul 05, 2010 at 03:43:21AM -0400, Mike Frysinger wrote:
> > >> On Saturday, July 03, 2010 05:48:13 Kurt Roeckx wrote:
> > >> > On Tue, Jun 22, 2010 at 11:42:43AM +0200, Werner Koch wrote:
> > >> > > Hi!
> > >> > > 
> > >> > >   GCRYPT_1.2 {
> > >> > > 
> > >> > >     global:
> > >> > >       gcry_check_version; gcry_control;
> > >> > > 
> > >> > >   [...]
> > >> > > 
> > >> > > Blackfin seems to be the only platform which has version script
> > >> > > support and prefixes symbols with underscores.  That does not
> > >> > > work of course.
> > >> > 
> > >> > blackfins is one of the arches that defined underscores in the
> > >> > ABI.  But I don't think an application writer should care about
> > >> > that, and that this is a bug in binutils.
> > >> 
> > >> no, it isnt.  please read the whole thread and the linker
> > >> documentation.
> > > 
> > > I'm not sure which part of the thread you think I missed that said
> > > anything about it.  Most of it is actually about complelty
> > > unrelated issues that have nothing to do with bfin.
> > > 
> > > The only mail that seems to be about it is Ralf's mail about the
> > > mangling.  But I'm not convinced that libtool should do any
> > > mangle/demangle thing.  Atleast the gnu linker will already do the
> > > proper thing for you, but some others might not.
> > > 
> > > If you think I missed something, please point me to the actual
> > > mail or documentation.
> > 
> > you stated "it is a bug in binutils".  that is simply wrong.  the
> > linker script deals in *linker visible* symbols while C code deals in
> > *C visible*.  it has always been this way and as you indirectly
> > stated, this is not Blackfin specific.
> 
> We're talking about a version script, not a linker script.

typo; i meant version script

> But my point is that a version script is nothing arch specific,
> unlike a linker script.  Version scripts even support saying in
> which language the symbol is, so that it can properly mangle it
> for you.  Adding the symbol inside an 'extern "C"' also doesn't
> have any effect.

with no lang spec, it is arch specific because it is dealing in linker visible 
symbols.  you are correct that 'extern "C"' should work though.
-mike
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