Copying data files to the build directory with qmake

Sometimes you want to copy some data files to the same folder as your final executable when you are building with qmake in a different directory than your source code. This is what Qt Creator does by default, so this is quite often needed.

Just add the following to your .pro file to copy the folder "data" from the source directory to the build directory whenever you build the source code:

copydata.commands = $(COPY_DIR) $$PWD/data $$OUT_PWD
first.depends = $(first) copydata
export(first.depends)
export(copydata.commands)
QMAKE_EXTRA_TARGETS += first copydata

The meaning of the different names in the above are as follows:

This method is a bit messy, and I wish the Qt developers would make it easier to do this, but it works. It also ensures that the data is always copied, ensuring that any changes in the data folder are pushed to the build folder.