Addition/Increment in .pro file

[Max13]

Hi,

I see that there are many really useful functions for QMake, but I'm looking for a way to make an addition and I don't see how.

For instance (MyProject.pro):
@NUM = 42
message($$NUM)@

I can see "42" printed, but what if I want to show 43 programmatically? +1 or ++ aren't recognized.

Thanks for your help.

[andrep]

I am only aware of platform dependent method lilke
@NUM = 42
NUM = $$system(expr $$NUM + 1)
message($$NUM)
@