QMake - How to add and use a variable into the .pro file
I have a qmake file generated by Qt creator. I am modifying it but I do not manage to understand how to create a variable.
For example, I want to declare the library MYPATH as I did here:
MYPATH = /lib/aaa/bbb
unix:!macx:!symbian: LIBS += -L$(MYPATH)
When I run qmake I find in the generated makefile
LIBS = ....... -L$(MYPATH) .....
But the MYPATH variable is not declared anywhere.
Does anyone know how to declare such a variable properly?
Answer
QMake uses its own syntax for variable references.
VAR = foobar=> Assign value to variable when qmake is run$$VAR=> QMake variable's value at the time qmake is run$${VAR}=> QMake variable's value at the time qmake is run (identical but enclosed to separate from surrounding text)$(VAR)=> Contents of an Environment variable at the time Makefile (not qmake) is run$$(VAR)=>Contents of an Environment variable at the time qmake (not Makefile) is run
Try it like this
MYPATH = /lib/aaa/bbb
unix:!macx:!symbian: LIBS += -L$${MYPATH}