Conditionally disable warnings on ceratin source files in qmake?

Hello,

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 tons of warnings. I would like to use -W -Wall on our source code, but pass -w to the nasty third-party library to keep the console free of noise and clutter so we can focus on our code quality.

In qmake, is there a way to conditionally add CFLAGS/CXXFLAGS to certain files and libraries?

There's QMAKE_CXXFLAGS and "CONFIG += no_warn" (or was it "CONFIG -= warn_on"?).

I only would like to disable warnings for the bad third-party header files, but very much would like to keep warnings on my code!

So it's not a separate library but its sources are included to the main project?

yes, .h files included from our code

We have to use their headers to interface with their API.

The compiler flags can only be set for c/cpp files.
If you code a perfect cpp file that includes an ugly third party header it is bad luck for you.
You should force the third party developers to stick to some guidelines and demand a measurable quality from them.

Maybe gcc provides an option to selectively switch off a certain warning.
I know this from the Green Hills compiler that we use for automotive controllers. Every possible warning has a number that can be used as argument for that option.

I think you can do it by these:

Code:

---

#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wunused-variable"
#include "third_party.h"
#pragma GCC diagnostic warning "-Wunused-parameter"
#pragma GCC diagnostic warning "-Wunused-variable"
#include "your_header.h"

---

Reference:
http://gcc.gnu.org/onlinedocs/gcc-4....nostic-Pragmas
http://gcc.gnu.org/onlinedocs/gcc-3....ning%20Options