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Editorial Team
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Asked: 2026-05-20T09:42:35+00:00

Is there a way to get qmake to substitute a custom variable like this?

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Is there a way to get qmake to substitute a custom variable like this? In other words, I want $(LIBS) to be replaced with the variable LIBS, so that I can easily change the include path from machine to machine. Many thanks in advance!

LIBS = c:/tmp/libs.pfo
INCLUDEPATH += . \
$(LIBS)/OpenCV2.1-msvc/include \
$(LIBS)/OpenCV2.1-msvc/modules/core/include \
$(LIBS)/OpenCV2.1-msvc/modules/imgproc/include \
...

I have also tried this to no avail: 

LIBS = c:/tmp/libs.pfo
INCLUDEPATH += . \
$$quote($$LIBS/OpenCV2.1-msvc/include) \
$$quote($$LIBS/OpenCV2.1-msvc/modules/core/include) \
$$quote($$LIBS/OpenCV2.1-msvc/modules/imgproc/include) \
...
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1 Answer

  1. Editorial Team

    UPDATE: After seeing another thread I tried a third trick, which worked! qmake can't evaluate a proper variable 

    LIBS = c:/tmp/libs.pfo
INCLUDEPATH += . \
$$quote($${LIBS}/OpenCV2.1-msvc/include) \
$$quote($${LIBS}/OpenCV2.1-msvc/modules/core/include) \
$$quote($${LIBS}/OpenCV2.1-msvc/modules/imgproc/include) \
...
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