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Using a Static Library I Created

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  • O ofmrew

    @SGaist
    INCLUDEPATH +=
    D:/qtprograms/MyLibraries/

    LIBS += -LD:/qtprograms/MyLibraries -llibMy3DLib

    I originally had the library at d:/MyLibraries but when I saw in the documentation that it should be under the same folder as the program I made the change.

    If the above ,pro entries are not correct the what should they be?

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by
    #18

    @ofmrew said in Using a Static Library I Created:

    INCLUDEPATH += 
    D:/qtprograms/MyLibraries/
    

    Is this really what you have, as shown on two lines?

    And similarly

    LIBS +=
    -LD:/MyLibraries/
    -llibMy3DLib
    

    ?

    O 1 Reply Last reply
    0
    • JonBJ JonB

      @ofmrew said in Using a Static Library I Created:

      INCLUDEPATH += 
      D:/qtprograms/MyLibraries/
      

      Is this really what you have, as shown on two lines?

      And similarly

      LIBS +=
      -LD:/MyLibraries/
      -llibMy3DLib
      

      ?

      O Offline
      O Offline
      ofmrew
      wrote on last edited by
      #19

      @JonB The .pro file is:

      QT += core gui

      greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

      CONFIG += c++11

      You can make your code fail to compile if it uses deprecated APIs.

      In order to do so, uncomment the following line.

      #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

      SOURCES +=
      main.cpp
      mainwindow.cpp

      HEADERS +=
      mainwindow.h

      FORMS +=
      mainwindow.ui

      INCLUDEPATH +=
      D:/qtprograms/MyLibraries/libMy3DLib

      LIBS += -LD:/qtprograms/MyLibraries -lMy3DLib

      Default rules for deployment.

      qnx: target.path = /tmp/$${TARGET}/bin
      else: unix:!android: target.path = /opt/$${TARGET}/bin
      !isEmpty(target.path): INSTALLS += target

      win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLib
      else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLibd

      INCLUDEPATH += $$PWD/../MyLibraries
      DEPENDPATH += $$PWD/../MyLibraries

      win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/libMy3DLib.a
      else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/libMy3DLibd.a
      else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/My3DLib.lib
      else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/My3DLibd.lib

      win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLib
      else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLibd

      INCLUDEPATH += $$PWD/../MyLibraries
      DEPENDPATH += $$PWD/../MyLibraries

      I think that I have tried ever combination for LIBS and INCLUDEPATH, but every time I compile I have not issues, but when I look at mainwindow.cpp i have all my includes marked as file not found.

      #include "mainwindow.h"
      #include "ui_mainwindow.h"
      #include "vector4.h"
      #include "matrix4x4.h"
      #include "freefun.h"

      MainWindow::MainWindow(QWidget *parent)
      : QMainWindow(parent)
      , ui(new Ui::MainWindow)
      {
      ui->setupUi(this);
      }

      MainWindow::~MainWindow()
      {
      delete ui;
      }
      From what I have found on the Internet I am not the only one having trouble accessing a library on the windows platform. Could win11 be the problem?

      O 1 Reply Last reply
      0
      • O ofmrew

        @JonB The .pro file is:

        QT += core gui

        greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

        CONFIG += c++11

        You can make your code fail to compile if it uses deprecated APIs.

        In order to do so, uncomment the following line.

        #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

        SOURCES +=
        main.cpp
        mainwindow.cpp

        HEADERS +=
        mainwindow.h

        FORMS +=
        mainwindow.ui

        INCLUDEPATH +=
        D:/qtprograms/MyLibraries/libMy3DLib

        LIBS += -LD:/qtprograms/MyLibraries -lMy3DLib

        Default rules for deployment.

        qnx: target.path = /tmp/$${TARGET}/bin
        else: unix:!android: target.path = /opt/$${TARGET}/bin
        !isEmpty(target.path): INSTALLS += target

        win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLib
        else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLibd

        INCLUDEPATH += $$PWD/../MyLibraries
        DEPENDPATH += $$PWD/../MyLibraries

        win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/libMy3DLib.a
        else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/libMy3DLibd.a
        else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/My3DLib.lib
        else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../MyLibraries/My3DLibd.lib

        win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLib
        else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../MyLibraries/ -lMy3DLibd

        INCLUDEPATH += $$PWD/../MyLibraries
        DEPENDPATH += $$PWD/../MyLibraries

        I think that I have tried ever combination for LIBS and INCLUDEPATH, but every time I compile I have not issues, but when I look at mainwindow.cpp i have all my includes marked as file not found.

        #include "mainwindow.h"
        #include "ui_mainwindow.h"
        #include "vector4.h"
        #include "matrix4x4.h"
        #include "freefun.h"

        MainWindow::MainWindow(QWidget *parent)
        : QMainWindow(parent)
        , ui(new Ui::MainWindow)
        {
        ui->setupUi(this);
        }

        MainWindow::~MainWindow()
        {
        delete ui;
        }
        From what I have found on the Internet I am not the only one having trouble accessing a library on the windows platform. Could win11 be the problem?

        O Offline
        O Offline
        ofmrew
        wrote on last edited by
        #20

        @ofmrew Since the include statement has the error file not found is it looking for a file and not an entry in the library?

        jsulmJ 1 Reply Last reply
        0
        • O Offline
          O Offline
          ofmrew
          wrote on last edited by
          #21

          I believe that I start from the beginning by creating a new library and then try to use it.

          1 Reply Last reply
          0
          • O ofmrew

            @ofmrew Since the include statement has the error file not found is it looking for a file and not an entry in the library?

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #22

            @ofmrew said in Using a Static Library I Created:

            Since the include statement has the error file not found is it looking for a file and not an entry in the library?

            Include files are not entries in libraries. If your header file is not found then check whether your added correct include folder in INCLUDEPATH

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            O 1 Reply Last reply
            0
            • jsulmJ jsulm

              @ofmrew said in Using a Static Library I Created:

              Since the include statement has the error file not found is it looking for a file and not an entry in the library?

              Include files are not entries in libraries. If your header file is not found then check whether your added correct include folder in INCLUDEPATH

              O Offline
              O Offline
              ofmrew
              wrote on last edited by
              #23

              @jsulm As I understand it, the .h files in the library I created are in a list of (I am not sure of the exact term) items in the library. I assume also that the compiler will look first at the header files in the project and then in libraries. If that is correct then either the library could not be found or the library does not include the header. If I could print the contents of the library then I could answer that question. It seem straight forward in Linux, but not Win.

              Also I would like to point out that the Qt documentation is inconsistent, in one place it shows the full Win path, starting with the drive letter for windows and the -L and -l for the path and the library, respectively. It would seem that there are few problems encountered by Linux users, but that is not the case for Win users. Nearly all of the examples are for Linux, not windows. If there was only one example that was win based, complete and that worked, then I could validate it on my system, I could then make some progress. Is CMAKE the solution, not QMAKE? Someone have a cmake example the meets the above criteria?

              jsulmJ 2 Replies Last reply
              0
              • O ofmrew

                @jsulm As I understand it, the .h files in the library I created are in a list of (I am not sure of the exact term) items in the library. I assume also that the compiler will look first at the header files in the project and then in libraries. If that is correct then either the library could not be found or the library does not include the header. If I could print the contents of the library then I could answer that question. It seem straight forward in Linux, but not Win.

                Also I would like to point out that the Qt documentation is inconsistent, in one place it shows the full Win path, starting with the drive letter for windows and the -L and -l for the path and the library, respectively. It would seem that there are few problems encountered by Linux users, but that is not the case for Win users. Nearly all of the examples are for Linux, not windows. If there was only one example that was win based, complete and that worked, then I could validate it on my system, I could then make some progress. Is CMAKE the solution, not QMAKE? Someone have a cmake example the meets the above criteria?

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #24

                @ofmrew said in Using a Static Library I Created:

                As I understand it, the .h files in the library I created are in a list of (I am not sure of the exact term) items in the library

                Don't know what you mean. Header files are not entries in a library. They are text files which can be located in any location - that is why you need to tell the compiler where to find them using INCLUDEPATH. There is really not much to say, simply set INCLUDEPATH properly...

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                1 Reply Last reply
                0
                • O ofmrew

                  @jsulm As I understand it, the .h files in the library I created are in a list of (I am not sure of the exact term) items in the library. I assume also that the compiler will look first at the header files in the project and then in libraries. If that is correct then either the library could not be found or the library does not include the header. If I could print the contents of the library then I could answer that question. It seem straight forward in Linux, but not Win.

                  Also I would like to point out that the Qt documentation is inconsistent, in one place it shows the full Win path, starting with the drive letter for windows and the -L and -l for the path and the library, respectively. It would seem that there are few problems encountered by Linux users, but that is not the case for Win users. Nearly all of the examples are for Linux, not windows. If there was only one example that was win based, complete and that worked, then I could validate it on my system, I could then make some progress. Is CMAKE the solution, not QMAKE? Someone have a cmake example the meets the above criteria?

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #25

                  @ofmrew said in Using a Static Library I Created:

                  in one place it shows the full Win path, starting with the drive letter for windows and the -L and -l for the path and the library

                  Yes, because linking works differently on Windows...

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  O 1 Reply Last reply
                  0
                  • jsulmJ jsulm

                    @ofmrew said in Using a Static Library I Created:

                    in one place it shows the full Win path, starting with the drive letter for windows and the -L and -l for the path and the library

                    Yes, because linking works differently on Windows...

                    O Offline
                    O Offline
                    ofmrew
                    wrote on last edited by
                    #26

                    @jsulm The library path in Win11 is D:\QtPrograms\MyLibraries\libMy3DLib.a

                    When I use
                    INCLUDEPATH +=
                    -LD:/qtprograms/MyLibraries/

                    LIBS += -lMy3DLib
                    I get
                    :-1: error: No rule to make target 'D:/qtprograms/TestMy3DLib/../MyLibraries/libMy3DLibd.a', needed by 'debug/TestMy3DLib.exe'. Stop.
                    I remember seeing another entry for debug in some post any idea?

                    jsulmJ 1 Reply Last reply
                    0
                    • O ofmrew

                      @jsulm The library path in Win11 is D:\QtPrograms\MyLibraries\libMy3DLib.a

                      When I use
                      INCLUDEPATH +=
                      -LD:/qtprograms/MyLibraries/

                      LIBS += -lMy3DLib
                      I get
                      :-1: error: No rule to make target 'D:/qtprograms/TestMy3DLib/../MyLibraries/libMy3DLibd.a', needed by 'debug/TestMy3DLib.exe'. Stop.
                      I remember seeing another entry for debug in some post any idea?

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #27

                      @ofmrew said in Using a Static Library I Created:

                      INCLUDEPATH +=
                      -LD:/qtprograms/MyLibraries/

                      What is this?!
                      INCLUDEPATH contains the folders where include headers are located and has nothing to do with library files (.so, .dll, .lib, .a).
                      -L defines the path where libraries are located. -l defines library file name.
                      So, it should be like:

                      INCLUDEPATH += PAT_TO_HEADER_FILE_FOLDER
                      LIBS += -lD:/qtprograms/MyLibraries/libMy3DLib.a
                      

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
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