qtmake - shared resources between two projects/targets - c++

Question

I'm trying to set up directory with shared files but I ended up with No rule to make target 'position.cpp', .... What am I doing wrong?
filesystem tree (simplified):
Project.pro client server shared
./client:
client.pro main.cpp main.h
./server:
main.cpp main.h server.pro
./shared:
position.cpp position.h shared.pri
Project.pro:
TEMPLATE = subdirs
SUBDIRS = client server
client.pro (server.pro looks similar):
LIBS += $$system(sdl2-config --libs) -lSDL2_ttf -lSDL2_image -lSDL2_net
QMAKE_CXXFLAGS += $$system(sdl2-config --cflags) -Wall -Wextra -Werror -pedantic -std=c++11
SOURCES += \
main.cpp
HEADERS += \
main.h
include(../shared/shared.pri)
shared.pri:
SOURCES += \
position.cpp
HEADERS += \
position.h

Answer 1

The given error could occur when make fails to find the referenced position.cpp file. The reason is that it tries to find the position.cpp in the directory where the .pro and not the .pri file is. To fix it you might try to use _PRO_FILE_PWD_ variable in your .pri file to properly set path to the position.cpp(h) files.