Nested project structur Qt 5.15.2 MSVC2019 linker problem

kluszon

I tried to compile my Linux application with subprojects on Windows with MinGW and Qt 5.15.2, but I need for it QWebEngine and it required MSVC2019. I'm trying to do it, but I can't solve the linker error: "LINK : fatal error LNK1104: cannot open file "application_src.lib""

Project structure:
-> application-with-test
--> application_app
--> application_src
--> application_tests

application-with-test.pro

TEMPLATE = subdirs
CONFIG += ordered

SUBDIRS += \
    application_src \
    application_app \
    application_tests

application_app.depends = application_src
application_tests.depends = application_src

OTHER_FILES += \
    defaults.pri

application_app.pro

include(../defaults.pri)

TEMPLATE = app

QT += qml quick

TARGET = application-with-test

CONFIG += c++1z
CONFIG -= app_bundle

CONFIG(release, debug|release):DEFINES += QT_NO_DEBUG_OUTPUT

SOURCES += source/main.cpp

unix {
    LIBS += -L../application_src -lapplication_src
}

win32 {
    CONFIG(debug, debug|release) {
    LIBS += -L$$OUT_PWD/../application_src/debug/ -lapplication_src
    }
    CONFIG(release, debug|release) {
    LIBS += -L$$OUT_PWD/../application_src/release/ -lapplication_src
    }
}

application_src.pro

include(../defaults.pri)

QT += qml quick

TARGET = application_src

CONFIG += c++1z

TEMPLATE = lib

HEADERS += \
            xyz.h

SOURCES += \
           xyz.cpp

RESOURCES += \
            qml.qrc \
            resources.qrc

application_tests.pro

TEMPLATE = subdirs

SUBDIRS += \
             xyz_tests

I tired to add staticlib to CONFIG in application_src.pro, but it finished with other error "LNK2001 unresolved external symbol ......" Any suggestion on how to solve it without resigning from the project structure?

SGaist

@kluszon yes, it's explained in the Creating Shared Libraries.

SGaist

Hi,

The unix block for linking to the library is missing the $$OUT_PWD in the -L statement. Take a look at the win32 block.

kluszon

@SGaist It doesn't change anything, I still have "LINK : fatal error LNK1104: cannot open file "application_src.lib" and no .lib file in the build directory.

SGaist

@kluszon are you properly exporting your classes ?

kluszon

@SGaist Should I do some special export for MSVC?

SGaist

@kluszon yes, it's explained in the Creating Shared Libraries.