Variables that persist across .pro files from a subdirs pro file

Question

Greetings,

I've got a .pro file that looks like:

TEMPLATE = subdirs
SUBDIRS = foo bar

I want to set a variable, or define, or something in my subdirs .pro file that can be read in both the foo and bar .pro files.

I've tried to set an environment variable with:

export TEST=something

but that does not work, message($$(TEST)) always shows nothing (like TEST is unset).

Answer 1

Another option is to place the common variables in a file called ".qmake.cache" stored in the root dir of the project. This way you don't need to include any .pri files in the subdir projects.

Answer 2

Just place them in a common .pri file eg. common.pri and use qmake's own include syntax to include it i.e.

include(path/common.pri)

where path is the path to common.pri relative to the including .pro file.