https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87310
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-15
CC| |manu at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Probably because the warning happens within a system header:
<source>: In function 'main':
<source>:6:14: warning: ISO C90 does not support boolean types
[-Wc90-c99-compat]
#define bool _Bool
^~~~~
<source>:30:2: note: in expansion of macro 'bool'
bool ok = true;
^~~~
This is another case of PR60304. The solution is to follow guidelines:
https://gcc.gnu.org/wiki/DiagnosticsGuidelines#Locations
and use
source_location loc =
expansion_point_location_if_in_system_header (original_location)
In this case, -Wsystem-headers doesn't work because:
if (!in_system_header_at (loc))
pedwarn_c90 (loc, OPT_Wpedantic,
"ISO C90 does not support boolean types");
I think this is useless, the diagnostics machinery already should disable
warning when loc is in a system header but still warn when -Wsystem-headers is
used.
