[Bug c++/36778] New: [feature request] -Wfatal-warnings

["gcc-bugzilla at contacts dot eelis dot net" <gcc-bugzilla at gcc dot gnu dot org>]

Gcc has a versatile set of warning/error flags that let one tune its behavior,
but there is one thing that it seems is currently not supported: the ability to
have gcc abort on the first diagnostic, without losing information about
whether that diagnostic is a warning or an error.

One can use -Werror -Wfatal-errors to get abortion on the first diagnostic, but
then warnings like "suggest parentheses around && within ||" are reported as
errors.

Ideally, there would be a flag -Wfatal-warnings, which would cause the compiler
to abort compilation on the first warning. One could then use -Wfatal-errors
-Wfatal-warnings to get abortion on the first diagnostic without losing
information about whether that diagnostic is a warning or an error.

While I believe this feature would be more generally useful, the particular use
case I'm requesting this for is geordi ( http://www.eelis.net/geordi/ ), a
popular educational IRC C++ bot which compiles C++ code snippets with gcc and
reports the first diagnostic (if any). Since only the first diagnostic is
needed, geordi uses -Werror -Wfatal-errors to reduce its response time, but
this means it misreports warnings like the one mentioned above, as errors.
Having -Wfatal-warnings would trivially solve this without imposing a
responsiveness penalty.

I realize this request might be a bit of a stretch, but I thought I'd give it a
shot. Thanks for your time.


-- 
           Summary: [feature request] -Wfatal-warnings
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gcc-bugzilla at contacts dot eelis dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36778