I'm working on webapp that tracks gcc warnings in a large C++ application. I tried grepping the build log for "warning:" which works well for simple single line warnings like "unused variable" etc. But g++ sometimes output multiline warnings like this one: file.h: In constructor ‘Blah::Blah()’: file.h:2411: warning: ‘Blah::second’ will be initialized after file.h:2406: warning: ‘SomeClass* Blah::first’ file.h:2413: warning: when initialized here ...this makes it a bit more complex to parse the build log correctly. If I don't special-case the multiline warning it will get counted as three warnings, which is not desirable in my case. Ideally, I don't want to parse each kind of warning separately because there are quite a lot of different warnings and new gcc versions might include new kinds of warnings and warning formatting. A) Can gcc output a machine readable build log (in XML or whatever)? B) Is there a list of all warnings GCC can output somewhere? Martin