[Bug bootstrap/42271] os_defines.h:60:1: error: expected '{' before '_GLIBCXX_PSEUDO_VISIBILITY'

[davek at gcc dot gnu dot org]

------- Comment #5 from davek at gcc dot gnu dot org  2009-12-04 17:58 -------
Created an attachment (id=19225)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19225&action=view)
Simple fix

The comment in the patch should explain.  Namespace macros are defined at the
top of c++config.h before target-specific headers are included, but need to
allow a target-specific override, so we have the pseudo-vis macro in there and
if it still isn't defined after the target-specific os_defines.h is included,
it gets defaulted empty.  That means the namespace macros can't be used until
after either the os-specific override if any or the empty default has actually
been defined for it of course.

This works fine, except when an os_defines.h header needs to use the namespace
macros itself.  The trivial fix is for it to provide its own empty definition
of the os-specific override, as here.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42271