RE: [HOpenGL] FW: ghc-6.4.1 on solaris

On 12 July 2005 13:14, Axel Simon wrote:

> On Tue, 2005-07-12 at 12:54 +0100, Simon Marlow wrote:
>> On 12 July 2005 11:52, Christian Maeder wrote:
>> 
>>> Sven Panne wrote:
>>>> FYI: I've just committed a fix to CVS HEAD for GHC on SPARC to
>>>> reduce the register pressure on gcc, which will probably make its
>>>> way into GHC 6.4.1. The OpenGL/GLUT packages compile fine now with
>>>> gcc 3.4.4 on SPARC, success stories and/or tragic failures with
>>>> this patch are highly welcome...
>>> 
>>> Good, I'm trying to create a release. Would you also dare to look
>>> into the mangler to fix the linking problem of ghci? Or do you have
>>> clue how to do this, Simon?
>> 
>> Sorry, I don't have any idea what's causing that problem.
> 
> ...but it would be nice to get it fixed. The symbol seens to stem from
> ghc/compiler/cmm/CLabel.hs where it says:
> 
> pprCLbl ModuleRegdLabel
>   = ptext SLIT("_module_registered")
> 
> Is this meant to be an external symbol? And what does it do?

_module_registered is a single word-sized variable in every module.  The
symbol is supposed to be local, and hence not visible to other modules
(otherwise it clashes, of course).  On Sparc, it appears that something
is going wrong either in the mangler or the splitter or the linker, and
this symbol is leaking(?).

You could check whether it is indeed local as it is supposed to be in
the library modules.  eg. if I say 'nm libHSbase.a | grep
module_registered' on Linux, I get nothing back.

Cheers,
        Simon