>From PR35637 but this is a general issue of the diagnostic machinery.
The problem is: -pedantic no warning, -pedantic-errors gives an
error.
Explanation: The pedantic warning is in a system header, so it doesn't get
emitted. When using -pedantic-errors, it is an error, and errors are always
emitted.
Longer explanation: The problem is in
diagnostics.c (diagnostic_report_diagnostic) which checks only for DK_WARNING
if
they should be inhibited (either because of -w or because location is within
system headers. However, pedwarn() is passing a DK_ERROR when -pedantic-errors
is enabled.
One possible fix is that pedwarn() always passes a DK_WARNING type, while
-pedantic-errors reclassifies -pedantic warnings to emit errors. In other
words, -pedantic-errors would behave internally like -Werror=pedantic.
--
Summary: pedwarn() + -pedantic-errors + -w (inhibit_warnings)
should not emit errors
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: manu at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36901
