[Bug c++/33952] -Wfatal-errors truncates multi-line error messages.

["dmalcolm at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33952

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

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                 CC|                            |dmalcolm at gcc dot gnu.org

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Eelis from comment #2)
> Then perhaps I ought to explain what I'm using -Wfatal-errors for.
> 
> I wrote an IRC bot called geordi ( http://www.eelis.net/geordi ) that
> accepts lines of C++ code, compiles them with g++, and either reports the
> first compilation error or proceeds to run the resulting program and report
> its output. Geordi has proved to be an extremely useful demonstration tool
> that is now used in several C++ channels, including Freenode's ##c++ and
> ##iso-c++.
> 
> Since geordi only reports the first error (if any), it passes -Wfatal-errors
> to g++ to not waste time compiling further (response time is very important
> here). Unfortunately, this means that it currently reports truncated errors
> for snippets like the one I mentioned.

Eelis: FWIW, gcc has a -fmax-errors=n option; I wonder if setting that to 1
might be a better fit for geordi?  (just thinking aloud here).