Specifying Visual Studio's 'Conformance mode' in a qmake .pro file?

[Bart_Vandewoestyne]

I am currently using

QMAKE_CXXFLAGS += /permissive-

in my .pro file so that my code compiles using VS2019's /permissive- option. In the generated Visual Studio project, this compile flag then apparently gets added to the 'Additional Options':

However, I was expecting this option elsewhere, namely under 'Language / Conformance mode':

Is there a way to specify in my .pro file that I want to set 'Conformance mode' to /permissive-? Or is this not supported with qmake and is the only way around to use QMAKE_CXXFLAGS like I do now?

[Christian Ehrlicher]

You have to set it by your own.