How to set the location to load library files

IknowQT

###################### MainWidget ######################
# ----------------------------------------------------
# This file is generated by the Qt Visual Studio Tools.
# ------------------------------------------------------

QT       += core gui widgets

CONFIG += c++11

TEMPLATE = app
TARGET = MainWidget

MOC_DIR += .
OBJECTS_DIR += debug
UI_DIR += .
RCC_DIR += .
include(MainWidget.pri)

# �쇱�踰�由ы����Depoly
unix {
        target.path = /home/pi/QT_Execfiles
        INSTALLS += target
}

# �ㅽ������������移�
CONFIG(debug, debug|release) {
    DESTDIR = $$PWD/../Depoly_Exec/debug
} else {
    DESTDIR = $$PWD/../Depoly_Exec/release
}

#win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../Depoly_Exec/release/ -lCustomIndicator
#else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../Depoly_Exec/debug/ -lCustomIndicator
#else:unix:!macx: LIBS += -L$$PWD/../Depoly_Exec/ -lCustomIndicator

LIBS += -L$$PWD/../Depoly_Exec/debug/ -lCustomIndicator

INCLUDEPATH += $$PWD/../Depoly_Exec/debug
DEPENDPATH += $$PWD/../Depoly_Exec/debug

###################### CustomIndicator ######################
# ----------------------------------------------------
# This file is generated by the Qt Visual Studio Tools.
# ------------------------------------------------------

QT += gui core widgets
TEMPLATE = lib
DEFINES += CUSTOMINDICATOR_LIB
TARGET = CustomIndicator
CONFIG += c++11

SOURCES += ./CustomIndicator.cpp
HEADERS += ./customindicator_global.h \
    ./CustomIndicator.h

# �ㅽ������������移�
CONFIG(debug, debug|release) {
    DESTDIR = $$PWD/../Depoly_Exec/debug
} 
else {
    DESTDIR = $$PWD/../Depoly_Exec/release
}

I want to create a dll file normally and load the file in MainWidget
Can you see if the way I did it is right?
When I try to declare CustomIndicator in the include header, it says the file cannot be found.

In the Depoly_Exec folder, I could confirm that the dll file and lib file were created normally.

jsulm

@IknowQT said in How to set the location to load library files:

LIBS += -L$$PWD/../Depoly_Exec/debug/ -lCustomIndicator

INCLUDEPATH += $$PWD/../Depoly_Exec/debug
DEPENDPATH += $$PWD/../Depoly_Exec/debug

You want to search for header files in deployment folder?

The proper way to manage this is to use https://wiki.qt.io/SUBDIRS_-_handling_dependencies

IknowQT

@jsulm

What's the reason you can't load it?

TEMPLATE = subdirs
SUBDIRS += MainWidget/MainWidget.pro \
    CustomIndicator/CustomIndicator.pro

jsulm

@IknowQT said in How to set the location to load library files:

What's the reason you can't load it?

Load what?
Please ask understandable questions.

IknowQT

@jsulm

I wonder why the header file can't be found.
It doesn't seem to be a problem with the path.

JonB

@IknowQT
There is no .h file in the directory you show, and it's not where header files are sought anyway. Where is your CustomIndicator.h file, and how does it relate your INCLUDEPATH?

jsulm

@IknowQT You simply need to specify your project dependencies.
Your MainWidget depends on CustomIndicator.
In the link a gave you is one example (last line):

TEMPLATE = subdirs
 
  SUBDIRS = \
            lib2 \   # sub-project names
            lib  \
            app
 
  # where to find the sub projects - give the folders
  lib2.subdir = src/lib2
  lib.subdir  = src/lib
  app.subdir  = src/app
 
  # what subproject depends on others
  app.depends = lib lib2

IknowQT

@jsulm

############ main.pro file ############
# ----------------------------------------------------
# This file is generated by the Qt Visual Studio Tools.
# ------------------------------------------------------

# This is a reminder that you are using a generated .pro file.
# Remove it when you are finished editing this file.
message("You are running qmake on a generated .pro file. This may not work!")


TEMPLATE = subdirs
SUBDIRS += MainWidget/MainWidget.pro \
    CustomIndicator/CustomIndicator.pro

Am I doing it right as you suggested?

IknowQT

@JonB

I made it as a dll file and there seems to be a problem in the process of including the dll file.

jsulm

@IknowQT said in How to set the location to load library files:

Am I doing it right as you suggested?

No.
Please read more carefully!
You specify the subfolders in SUBDIRS, not pro files.
And you did not specify the dependencies like shown in the example. Why?