Compile library and link active project when library code changes

Nando

Hi,

i have 2 qmake projects. One is the main application and one is a library.

Now i want to get the library recompiled AND relinked with my main application when a file inside the library has changed.

Somehow i always need to manually build the lib, then pseudo change a file in my main application (to trigger new linkage) to get the changes take effect.

There must be a way to define the dependency between my main application and my lib, but how?

Thank's for your help, and stay healthy...

Nando

mrjj

Hi
You can use a subdir setup
https://wiki.qt.io/SUBDIRS_-_handling_dependencies

Stay healthy too! :)

Nando

@mrjj Thank you.
I now tried it with SUBDIR like in the link.

My folder structure is as following:

application/
application/application.pro
application/src/lib/lib.pro
application/src/main-application/main-application.pro

And in the application.pro i set it up with SUBDIRS and .depends like this:

TEMPLATE = subdirs
 
SUBDIRS = \          
        lib \
        main-application

lib.subdir     = src/lib
main-application.subdir = src/main-application

main-application.depends = lib

Everything compiles fine.

But now the problem remains.
If i only change somethin inside lib and then rebuild only the lib get rebuild.
I want that after rebuilding the lib the main-application also gets linked against the new lib... Any ideas how to solve this?

Infinity

@Nando You have to put:

PRE_TARGETDEPS += \
   $$PWD/../src/lib/libyourlib.a

in your apllication/application.pro file.