Get global variable in *.pro file. How?

[bogong]

Hello all!

I need to use global variable from system environment in *.pro file. How to do it correctly?
Something like this:

DESTDIR = $$(A_PREBUILT_LIBS_ROOT)
PRI_FILE = $$DESTDIR/file.pri
include($$PRI_FILE)
message(Pri file dir $$DESTDIR)

How to get A_PREBUILT_LIBS_ROOT from system environment?
For now I see this:

Project MESSAGE: Pri file dir

The example from documentation

DESTDIR1 = $$(PWD)
message(The project will be installed in $$DESTDIR1)

Doesn't work either, I see this:

Project MESSAGE: The project will be installed in

[bogong]

The default project from Qt Creator and examples from documentation doesn't work at all

[bogong]

Issue solved. Solution found.
For me works only this:

DESTDIR = $$system(echo $A_PREBUILT_LIBS_ROOT)

And in the project build environment set this:

[kshegunov]

Is $$(A_PREBUILT_LIBS_ROOT) not working?

https://doc.qt.io/qt-5/qmake-language.html#variable-expansion

To obtain the contents of an environment value when qmake is run, use the $$(...) operator