[SOLVED] dependent project seems to be only partially linking with its dependency

Jesdisciple

I have a library project and an application project, and the application is configured with the library as an external dependency. They seemed to be working fine together until I tried to extend a library class in the application. The linker complains that the library class's constructor symbol is not found.

In the file that contains the parent class, I wrote a class extending it and calling its constructor. I moved this test class outside my library's namespace just to be sure, and it works. Of course the linker doesn't have a problem with file-internal references, but I wanted to be sure nothing more fundamental was wrong. And anyhow I'm not sure what test I could perform between these cases.

I can pare down my code for a minimal test case if necessary; I'll start on that after work if the issue isn't solved by then.

EDIT: Ah, there's no question mark in this post... How can I get my projects to link properly?

My .pro files:

application (note that I modified the -automatically generated- uglier portion to add the library's source directory to the include path)
@#-------------------------------------------------

Project created by QtCreator 2013-05-25T08:57:00

#-------------------------------------------------

QT += core gui widgets

TARGET = Pong
TEMPLATE = app
CONFIG += staticlib c++11

SOURCES +=
mainwindow.cpp
main.cpp
sprite.cpp

HEADERS += mainwindow.h
sprite.h

FORMS += mainwindow.ui

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../Qnity/build-Qnity-OS_X-Release/release/ -lQnity
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../Qnity/build-Qnity-OS_X-Release/debug/ -lQnity
else:unix: LIBS += -L$$PWD/../../Qnity/build-Qnity-OS_X-Release/ -lQnity

INCLUDEPATH += $$PWD/../../Qnity/build-Qnity-OS_X-Release
INCLUDEPATH += $$PWD/../../Qnity/Qnity
DEPENDPATH += $$PWD/../../Qnity/build-Qnity-OS_X-Release

win32:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../../Qnity/build-Qnity-OS_X-Release/release/Qnity.lib
else:win32:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../../Qnity/build-Qnity-OS_X-Release/debug/Qnity.lib
else:unix: PRE_TARGETDEPS += $$PWD/../../Qnity/build-Qnity-OS_X-Release/libQnity.a
@

library
@#-------------------------------------------------

Project created by QtCreator 2013-05-24T05:02:43

#-------------------------------------------------

QT += widgets opengl

TARGET = Qnity
TEMPLATE = lib
CONFIG += staticlib c++11

QMAKE_CXXFLAGS = -std=gnu0x -stdlib=libc+

SOURCES +=
entity.cpp
typed.cpp
system.cpp
entitymanager.cpp
icomponent.cpp

HEADERS += entity.h
typed.h
system.h
entitymanager.h
icomponent.h
unix:!symbian {
maemo5 {
target.path = /opt/usr/lib
} else {
target.path = /usr/lib
}
INSTALLS += target
}
@

Jesdisciple

Sorry this is a bit late. The issue was purely a C++ one of not implementing a template class's constructor in the header file. Oops.