Removing Unused parameters warning in QtCreator

Question

I added this to my .pro file but I stil get warnings :

QMAKE_CXXFLAGS_WARN_OFF = -Wunused-parameter

Answer 1

Try

... = -Wno-unused-parameter

Please see here for details.

Or try

QMAKE_CXXFLAGS_WARN_OFF -= -Wunused-parameter

Note the - in front of the =.

Answer 2

Use QMAKE_CXXFLAGS_WARN_ON += -Wno-unused-parameter,
because the flags in QMAKE_CXX_FLAGS will always before QMAKE_CXXFLAGS_WARN_ON, and QMAKE_CXXFLAGS_WARN_ON contains the flag -Wall. This means your flag will be overwrite by flag -Wall.

Answer 3

I have tried all the following combinations in the .PRO file, and nothing works:

macx: {
QMAKE_CFLAGS += -Wno-unused-parameter
QMAKE_CFLAGS -= -Wunused-parameter
QMAKE_CXXFLAGS += -Wno-unused-parameter 
QMAKE_CXXFLAGS -= -Wunused-parameter 
QMAKE_CXXFLAGS_WARN_ON += -Wno-unused-parameter
QMAKE_CXXFLAGS_WARN_ON -= -Wunused-parameter
QMAKE_CXXFLAGS_WARN_OFF += -Wunused-parameter
QMAKE_CXXFLAGS_WARN_OFF -= -Wno-unused-parameter
}

I'm using Qt 5.14. Does anyone have a suggestion on how to suppress specific warnings?

Note: I'm not interested in this warning specifically, it's just an example. There are other warnings I wish to suppress for the moment.