Conditionally disable warnings with qmake/gcc?

Question

I am involved with a software project written in Qt and built with qmake and gcc on Linux. We have to link to a third-party library that is of fairly low quality and spews

Answer 1

What if you include your library using -isystem.

In the project file e.g.:

QMAKE_CXXFLAGS += -isystem /usr/local/boost_1_44_0