http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46836
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-29 12:14:18 UTC --- (In reply to comment #2) > #pragma GCC canonical_header [header-name] [identifier] I don't think we even need to do it per-identifier. If each standard header started with: #pragma GCC canonical_header push [header-name] and ended with: #pragma GCC canonical_header pop then we'd always know which header we're "in" when an error occurs, even for nested headers (e.g. <fstream> includes <ios>) and helper files that are included from many places (e.g. bits/stl_tree.h gets included by both <map> and <set>)
