qmake ：警告：没有规则使目标停止

Question

I came across lots of similar posts, but none of them helped me.

I have a project which has an app and test. Both App and test depends on a common lib (which is a submodule of the app). Here is my project structure.

|
|_ _Application.pro
|_ _App/app.pro
|_ _lib/lib.pro
|_ _TestSuite/
             |_ _Test.pro

#Application.pro 


TEMPLATE = subdirs
SUBDIRS +=  app \
            lib

#subdirs
lib.file = $${PWD}/lib/lib.pro
app.file = $${PWD}/App/app.pro

#dependecies
app.depends  =  lib

QMAKE_CLEAN += $${OUT_PWD}/Makefile*

#Test.pro 


TEMPLATE = subdirs
SUBDIRS +=  Test \
            lib

#subdirs
lib.file = $${PWD}/../lib/lib.pro
app.file = $${PWD}/TestSuite/Test.pro

#dependecies
Test.depends  =  lib

QMAKE_CLEAN += $${OUT_PWD}/Makefile*

The application compiles fine, but when I run make on test it throws No rule to make target lib.pro needed by Test.pro Stop error.

If I copy the lib files under TestSuite then it works perfectly. So is it mandatory that subdirs should a subdirectory of the current application?

Answer 1

Although I can't seem to find it in the documentation at the moment, I at least found a bug report that states that .pro files using the subdirs template should not use directories that point upward in the directory structure. Your subdirs .pro file should be the root of your directory tree.

|
|_ _Application.pro
|_ _Test.pro
|_ _App/
        |_ _app.pro
|_ _lib/
        |_ _lib.pro

EDIT: Here's the relevant documentation stating that:

It is strongly recommended that you specify only paths in the current project's parent directory or its subdirectories.