How to refer to the source directory in qmake?

Question

I added

version.target = version.h
version.commands = bash generate-version.sh

QMAKE_EXTRA_TARGETS += version

PRE_TARGETDEPS += version.h

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Answer 1

I found a better and cleaner solution

version.target = version.h
version.commands = bash ${QMAKE_VAR__PRO_FILE_PWD_}/generate-version.sh
QMAKE_EXTRA_TARGETS += version

The variable _PRO_FILE_PWD_ is documented since qt 4.5 and contains the path to the directory containing the project file in use (Contains the .pro file)

But to access this variable for QMAKE_EXTRA_TARGETS, QMAKE_VAR_ must be appended.