plugin hooks

[Joseph S. Myers]

On Tue, 27 Oct 2009, Basile STARYNKEVITCH wrote:

> I (Basile) don't know much of libcpp. If a plugin can just call cpp_define,
> this is ok for me. But then, we perhaps should document how can that be
> called, and when (at plugin initialization, at PLUGIN_START_UNIT? I don't
> know!)

A plugin can call any non-static function in GCC, with the conditions for 
its inputs and when it can be called being the same as for a direct call 
from GCC; this is a consequence of the design to use -rdynamic.  These may 
variously be documented in comments, the internals manual, list archives 
and collective wisdom.  If you want better documentation for a particular 
function, find where the existing documentation is (comments or internals 
manual) and propose a patch.  If you think a static function should be 
made non-static so plugins can call it, propose a patch with appropriate 
rationale.

-- 
Joseph S. Myers
joseph@codesourcery.com