[rfc] towards a defined abi for libgfortran

[Andrew Pinski]

On Dec 6, 2004, at 7:41 PM, Richard Henderson wrote:

> A prerequisite for being able to point to an ABI is symbol access 
> control.
> Namely, you don't want to expose any symbols that you don't mean to 
> expose.
>
> The following patch replaces the prefix macro with a set of fine-grain
> macros that do allow us to control which symbols are seen by user apps.
>
> On elf systems, it will use __attribute__((visibility("hidden"))) to
> prevent specific symbols from escaping the library.  It will also use
> __attribute__((alias(...))) to reduce the number of PLT entries needed
> when calling routines that we do intend to export.
> Comments?

I will test this on darwin which has visibility("hidden") but not alias.

Thanks,
Andrew Pinski