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Qt 5.7 and cross compile

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qt 5.7 and rpi3
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  • D deleted71
    25 Jun 2016, 14:22

    What command did you execute? The whole command line please.
    And please try to use

    // Code markers
    

    for console output and commands.

    N Offline
    N Offline
    Niko Hallikainen
    wrote on 25 Jun 2016, 14:50 last edited by
    #9

    @I.C.Wiener Command is:

     ./configure -release -opengl es2 -device linux-rpi3-g++ -device-option CROSS_COMPILE=~/raspi/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf- -sysroot ~/raspi/sysroot -opensource -confirm-license -make libs -prefix /usr/local/qt5pi -extprefix ~/raspi/qt5pi -hostprefix ~/raspi/qt5 -v
    And I run it in folder qtbase.
    
    1 Reply Last reply
    0
    • D Offline
      D Offline
      deleted71
      wrote on 25 Jun 2016, 17:09 last edited by
      #10

      I had some success by installing

      g++-arm-linux-gnueabihf
      

      and then replacing

      CROSS_COMPILE=~/raspi/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-
      

      by

      CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf-
      

      In general I was trying to cross-compile Qt5.7 for Raspi 3 for some days, made some progress but in the end, the result was not convincing. I guess the raspi-tools need some updating for raspi 3 and Qt5.7 respectively.

      N 1 Reply Last reply 25 Jun 2016, 17:26
      0
      • D deleted71
        25 Jun 2016, 17:09

        I had some success by installing

        g++-arm-linux-gnueabihf
        

        and then replacing

        CROSS_COMPILE=~/raspi/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-
        

        by

        CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf-
        

        In general I was trying to cross-compile Qt5.7 for Raspi 3 for some days, made some progress but in the end, the result was not convincing. I guess the raspi-tools need some updating for raspi 3 and Qt5.7 respectively.

        N Offline
        N Offline
        Niko Hallikainen
        wrote on 25 Jun 2016, 17:26 last edited by
        #11

        @I.C.Wiener Yes I install that from ubuntu repository, but it give that error.

        /usr/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -pipe -Os -mthumb -std=c++1z -mfloat-abi=hard --sysroot=/home/nikohal/raspi/sysroot -g -Wall -W -fPIC  -I. -I../../mkspecs/devices/linux-rpi3-g++ -o arch.o arch.cpp
        arm-linux-gnueabihf-g++: error: unrecognized command line option ā€˜-std=c++1z’
        make: *** [arch.o] Error 1
        Unable to determine architecture!
        
        Could not determine the target architecture!
        Turn on verbose messaging (-v) to see the final report.
        Determining architecture... ()
        g++ -c -pipe -g -Wall -W -fPIC  -I. -I../../mkspecs/linux-g++ -o arch.o arch.cpp
        g++  -o arch arch.o    
            Found architecture in binary
        CFG_HOST_ARCH="x86_64"
        CFG_HOST_CPUFEATURES=" mmx sse sse2"
        System architecture: 'unknown'
        Host architecture: 'x86_64'
        Precompiled-headers support enabled.
        /usr/bin/arm-linux-gnueabihf-g++ -c -fvisibility=hidden fvisibility.c
        Symbol visibility control enabled.
        /usr/bin/arm-linux-gnueabihf-g++ --sysroot=/home/nikohal/raspi/sysroot -o libtest.so -shared -Wl,-Bsymbolic-functions -fPIC bsymbolic_functions.c
        bsymbolic_functions.c:2:2: error: #error "Symbolic function binding on this architecture may be broken, disabling it (see QTBUG-36129)."
         #error "Symbolic function binding on this architecture may be broken, disabling it (see QTBUG-36129)."
          ^
        Symbolic function binding disabled.
        checking for C++11... 
        /usr/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -pipe -Os -mthumb -std=c++1z -mfloat-abi=hard --sysroot=/home/nikohal/raspi/sysroot -O2 -std=gnu++11 -Wall -W -fPIC  -I. -I../../../mkspecs/devices/linux-rpi3-g++ -o c++11.o c++11.cpp
        arm-linux-gnueabihf-g++: error: unrecognized command line option ā€˜-std=c++1z’
        make: *** [c++11.o] Error 1
        C++11 disabled.
        ERROR: Qt requires a C++11 compiler and yours does not seem to be that.
        Please upgrade.
        

        I Google that, but nothing similar not found

        S 1 Reply Last reply 12 Jun 2018, 12:43
        0
        • D Offline
          D Offline
          deleted71
          wrote on 26 Jun 2016, 10:17 last edited by
          #12

          Hmm, sorry. I do not have my cross-compiling environment set up anymore (it was too fiddly so I now compile on the Raspi3 directly) but I remember me playing around with the qtbase/mkspecs/common/g++-base.conf file. Like changing the -std=c++1z line to -std=c++11, so cheating a little bit. I guess if arm-linux-gnueabihf-g++ does not know c++1z yet, there's not much else you can do.

          N 2 Replies Last reply 26 Jun 2016, 19:55
          0
          • D deleted71
            26 Jun 2016, 10:17

            Hmm, sorry. I do not have my cross-compiling environment set up anymore (it was too fiddly so I now compile on the Raspi3 directly) but I remember me playing around with the qtbase/mkspecs/common/g++-base.conf file. Like changing the -std=c++1z line to -std=c++11, so cheating a little bit. I guess if arm-linux-gnueabihf-g++ does not know c++1z yet, there's not much else you can do.

            N Offline
            N Offline
            Niko Hallikainen
            wrote on 26 Jun 2016, 19:55 last edited by
            #13

            @I.C.Wiener I have now this problem in raspberry pi 3. I try to compile in there qt, but it give this error:

            Running configuration tests...
            Failed to process makespec for platform 'devices/linux-rasp-pi-g++'
            Project ERROR: CROSS_COMPILE needs to be set via -device-option CROSS_COMPILE=<path>
            Could not read qmake configuration file /home/pi/qt-everywhere-opensource-src-5.7.0/qtbase/mkspecs/devices/linux-rasp-pi-g++/qmake.conf.
            Error processing project file: /dev/null
            

            My configure is:

            ./configure -v -xcb -tslib -force-pkg-config -device linux-rasp-pi-g++ -opensource -confirm-license -optimized-qmake -reduce-exports -release -qt-pcre -make libs  -prefix /usr/local/qt5 2>&1 | tee config.out
            
            1 Reply Last reply
            0
            • D deleted71
              26 Jun 2016, 10:17

              Hmm, sorry. I do not have my cross-compiling environment set up anymore (it was too fiddly so I now compile on the Raspi3 directly) but I remember me playing around with the qtbase/mkspecs/common/g++-base.conf file. Like changing the -std=c++1z line to -std=c++11, so cheating a little bit. I guess if arm-linux-gnueabihf-g++ does not know c++1z yet, there's not much else you can do.

              N Offline
              N Offline
              Niko Hallikainen
              wrote on 27 Jun 2016, 21:27 last edited by
              #14

              @I.C.Wiener I try to change that line, but now I get this error:

              Symbolic function binding disabled.
              checking for C++11...
              /usr/bin/g++ -c -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -pipe -Os -mthumb -std=c++1z -mfloat-abi=hard -O2 -std=gnu++11 -Wall -W -fPIC  -I. -I../../../mkspecs/devices/linux-rpi3-g++ -o c++11.o c++11.cpp
              g++: error: unrecognized command line option â-std=c++1zâ
              Makefile:417: recipe for target 'c++11.o' failed
              make: *** [c++11.o] Error 1
              C++11 disabled.
              ERROR: Qt requires a C++11 compiler and yours does not seem to be that.
              Please upgrade.
              

              How I can fix this?

              1 Reply Last reply
              0
              • N Niko Hallikainen
                25 Jun 2016, 17:26

                @I.C.Wiener Yes I install that from ubuntu repository, but it give that error.

                /usr/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -pipe -Os -mthumb -std=c++1z -mfloat-abi=hard --sysroot=/home/nikohal/raspi/sysroot -g -Wall -W -fPIC  -I. -I../../mkspecs/devices/linux-rpi3-g++ -o arch.o arch.cpp
                arm-linux-gnueabihf-g++: error: unrecognized command line option ā€˜-std=c++1z’
                make: *** [arch.o] Error 1
                Unable to determine architecture!
                
                Could not determine the target architecture!
                Turn on verbose messaging (-v) to see the final report.
                Determining architecture... ()
                g++ -c -pipe -g -Wall -W -fPIC  -I. -I../../mkspecs/linux-g++ -o arch.o arch.cpp
                g++  -o arch arch.o    
                    Found architecture in binary
                CFG_HOST_ARCH="x86_64"
                CFG_HOST_CPUFEATURES=" mmx sse sse2"
                System architecture: 'unknown'
                Host architecture: 'x86_64'
                Precompiled-headers support enabled.
                /usr/bin/arm-linux-gnueabihf-g++ -c -fvisibility=hidden fvisibility.c
                Symbol visibility control enabled.
                /usr/bin/arm-linux-gnueabihf-g++ --sysroot=/home/nikohal/raspi/sysroot -o libtest.so -shared -Wl,-Bsymbolic-functions -fPIC bsymbolic_functions.c
                bsymbolic_functions.c:2:2: error: #error "Symbolic function binding on this architecture may be broken, disabling it (see QTBUG-36129)."
                 #error "Symbolic function binding on this architecture may be broken, disabling it (see QTBUG-36129)."
                  ^
                Symbolic function binding disabled.
                checking for C++11... 
                /usr/bin/arm-linux-gnueabihf-g++ -c -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -pipe -Os -mthumb -std=c++1z -mfloat-abi=hard --sysroot=/home/nikohal/raspi/sysroot -O2 -std=gnu++11 -Wall -W -fPIC  -I. -I../../../mkspecs/devices/linux-rpi3-g++ -o c++11.o c++11.cpp
                arm-linux-gnueabihf-g++: error: unrecognized command line option ā€˜-std=c++1z’
                make: *** [c++11.o] Error 1
                C++11 disabled.
                ERROR: Qt requires a C++11 compiler and yours does not seem to be that.
                Please upgrade.
                

                I Google that, but nothing similar not found

                S Offline
                S Offline
                shivaVMC
                wrote on 12 Jun 2018, 12:43 last edited by
                #15

                @Niko-Hallikainen
                I too stuckup with the same issue,can you please help on the same.1 day wasted on the same error.it would be great help for me on ur suggestion.

                Thanks In advance

                Pablo J. RoginaP 1 Reply Last reply 12 Jun 2018, 17:46
                0
                • S shivaVMC
                  12 Jun 2018, 12:43

                  @Niko-Hallikainen
                  I too stuckup with the same issue,can you please help on the same.1 day wasted on the same error.it would be great help for me on ur suggestion.

                  Thanks In advance

                  Pablo J. RoginaP Offline
                  Pablo J. RoginaP Offline
                  Pablo J. Rogina
                  wrote on 12 Jun 2018, 17:46 last edited by
                  #16

                  @shivaVMC what about following this guide?

                  Upvote the answer(s) that helped you solve the issue
                  Use "Topic Tools" button to mark your post as Solved
                  Add screenshots via postimage.org
                  Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

                  S 2 Replies Last reply 13 Jun 2018, 10:19
                  1
                  • Pablo J. RoginaP Pablo J. Rogina
                    12 Jun 2018, 17:46

                    @shivaVMC what about following this guide?

                    S Offline
                    S Offline
                    shivaVMC
                    wrote on 13 Jun 2018, 10:19 last edited by
                    #17

                    @Pablo-J.-Rogina
                    I followed the complete procedure as per below link,Just changed the V_5.7.1 to my V_5.7.0
                    https://lb.raspberrypi.org/forums/viewtopic.php?t=204529
                    Still I m having the same issue can you please help me out on this,Almost I have spent 8 Houors on sorting this error.It will a kind support to reduce me tension.

                    Thanks In advance

                    1 Reply Last reply
                    0
                    • Pablo J. RoginaP Pablo J. Rogina
                      12 Jun 2018, 17:46

                      @shivaVMC what about following this guide?

                      S Offline
                      S Offline
                      shivaVMC
                      wrote on 13 Jun 2018, 10:47 last edited by
                      #18

                      @Pablo-J.-Rogina
                      Initially I was following that guide only,but I failed at beloe step
                      git clone git://code.qt.io/qt/qtbase.git -b linux-rasp-pi3-g++
                      Cloning into 'qtbase'...
                      fatal: Remote branch linux-rasp-pi3-g++ not found in upstream origin

                      Pablo J. RoginaP 1 Reply Last reply 13 Jun 2018, 11:30
                      0
                      • S shivaVMC
                        13 Jun 2018, 10:47

                        @Pablo-J.-Rogina
                        Initially I was following that guide only,but I failed at beloe step
                        git clone git://code.qt.io/qt/qtbase.git -b linux-rasp-pi3-g++
                        Cloning into 'qtbase'...
                        fatal: Remote branch linux-rasp-pi3-g++ not found in upstream origin

                        Pablo J. RoginaP Offline
                        Pablo J. RoginaP Offline
                        Pablo J. Rogina
                        wrote on 13 Jun 2018, 11:30 last edited by
                        #19

                        @shivaVMC said in Qt 5.7 and cross compile:

                        git clone git://code.qt.io/qt/qtbase.git -b linux-rasp-pi3-g++

                        You need to specify what Qt branch (i.e. 5.7, ..., 5.10, etc.) you want to clone from Git repository, let's say you want to cross-compile Qt 5.10:

                        git clone git://code.qt.io/qt/qtbase.git -b 5.10
                        

                        then you'll have a folder qtbase will all the sources to build Qt 5.10

                        Upvote the answer(s) that helped you solve the issue
                        Use "Topic Tools" button to mark your post as Solved
                        Add screenshots via postimage.org
                        Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

                        S 2 Replies Last reply 13 Jun 2018, 18:37
                        2
                        • Pablo J. RoginaP Pablo J. Rogina
                          13 Jun 2018, 11:30

                          @shivaVMC said in Qt 5.7 and cross compile:

                          git clone git://code.qt.io/qt/qtbase.git -b linux-rasp-pi3-g++

                          You need to specify what Qt branch (i.e. 5.7, ..., 5.10, etc.) you want to clone from Git repository, let's say you want to cross-compile Qt 5.10:

                          git clone git://code.qt.io/qt/qtbase.git -b 5.10
                          

                          then you'll have a folder qtbase will all the sources to build Qt 5.10

                          S Offline
                          S Offline
                          shivaVMC
                          wrote on 13 Jun 2018, 18:37 last edited by
                          #20

                          @Pablo-J.-Rogina
                          Hi Rogina,
                          Thank You,Thanks alot for quick response.
                          Your Comments/Suggestions are perfect to fix my issue.
                          Everything Looks fine now and my problem is solved.

                          Excellent...!!!

                          1 Reply Last reply
                          0
                          • Pablo J. RoginaP Pablo J. Rogina
                            13 Jun 2018, 11:30

                            @shivaVMC said in Qt 5.7 and cross compile:

                            git clone git://code.qt.io/qt/qtbase.git -b linux-rasp-pi3-g++

                            You need to specify what Qt branch (i.e. 5.7, ..., 5.10, etc.) you want to clone from Git repository, let's say you want to cross-compile Qt 5.10:

                            git clone git://code.qt.io/qt/qtbase.git -b 5.10
                            

                            then you'll have a folder qtbase will all the sources to build Qt 5.10

                            S Offline
                            S Offline
                            shivaVMC
                            wrote on 15 Jun 2018, 06:45 last edited by
                            #21

                            @Pablo-J.-Rogina
                            HI Again
                            I m using 2 different version of QT as
                            my PC installed with QT5.7.0
                            My Rpi3 Kit installed with QT5.10.1
                            Now I compiled the code and it went well in my PC,Same ".exe" I run in rpi3kit it gave me an error as below

                            "cannot execute binary file: Exec format error
                            Application finished with exit code 126."

                            Please can you suggest on this.

                            Where I m going wrong?Is I need to install QT5.10.1 on my PC also?

                            Pablo J. RoginaP 1 Reply Last reply 15 Jun 2018, 13:02
                            0
                            • S shivaVMC
                              15 Jun 2018, 06:45

                              @Pablo-J.-Rogina
                              HI Again
                              I m using 2 different version of QT as
                              my PC installed with QT5.7.0
                              My Rpi3 Kit installed with QT5.10.1
                              Now I compiled the code and it went well in my PC,Same ".exe" I run in rpi3kit it gave me an error as below

                              "cannot execute binary file: Exec format error
                              Application finished with exit code 126."

                              Please can you suggest on this.

                              Where I m going wrong?Is I need to install QT5.10.1 on my PC also?

                              Pablo J. RoginaP Offline
                              Pablo J. RoginaP Offline
                              Pablo J. Rogina
                              wrote on 15 Jun 2018, 13:02 last edited by
                              #22

                              @shivaVMC said in Qt 5.7 and cross compile:

                              Where I m going wrong?

                              You are mixing pears and apples :-)

                              Different Qt versions is not the issue here, the problem is different platform/architecture: your PC is x86 (I assume) while RPi is ARM

                              Remember that whatever Qt version you use in your RPi you would need to cross-compile in your PC

                              Upvote the answer(s) that helped you solve the issue
                              Use "Topic Tools" button to mark your post as Solved
                              Add screenshots via postimage.org
                              Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

                              S 1 Reply Last reply 18 Jun 2018, 07:25
                              2
                              • Pablo J. RoginaP Pablo J. Rogina
                                15 Jun 2018, 13:02

                                @shivaVMC said in Qt 5.7 and cross compile:

                                Where I m going wrong?

                                You are mixing pears and apples :-)

                                Different Qt versions is not the issue here, the problem is different platform/architecture: your PC is x86 (I assume) while RPi is ARM

                                Remember that whatever Qt version you use in your RPi you would need to cross-compile in your PC

                                S Offline
                                S Offline
                                shivaVMC
                                wrote on 18 Jun 2018, 07:25 last edited by
                                #23

                                @Pablo-J.-Rogina
                                Hi Rogina,
                                Finally I m successful in compiling the code and running on my target Board,Thanks alot .

                                But during runtime,I m facing with below error as
                                Unable to query physical screen size, defaulting to 100 dpi.
                                To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
                                QFontDatabase: Cannot find font directory /usr/local/qt5pi/lib/fonts.
                                Note that Qt no longer ships fonts. Deploy some (from http://dejavu-fonts.org for example) or switch to fontconfig.
                                Can you plesae help on this.

                                1 Reply Last reply
                                0
                                • sierdzioS Offline
                                  sierdzioS Offline
                                  sierdzio
                                  Moderators
                                  wrote on 18 Jun 2018, 07:56 last edited by
                                  #24

                                  @shivaVMC said in Qt 5.7 and cross compile:

                                  Unable to query physical screen size, defaulting to 100 dpi.

                                  This is not an error, you can safely ignore it.

                                  And if you want to solve it, just do what the next line says (export the 2 variables before launching your app).

                                  QFontDatabase: Cannot find font directory /usr/local/qt5pi/lib/fonts.
                                  Note that Qt no longer ships fonts. Deploy some (from http://dejavu-fonts.org for example) or switch to fontconfig.

                                  Here the error message mentions the solution, too. Just do what it says :-) Either put some fonts in the path where Qt is looking for them, or ship your own in a resource (QRC) with your app and install them at runtime.

                                  (Z(:^

                                  S 1 Reply Last reply 19 Jun 2018, 06:21
                                  3
                                  • sierdzioS sierdzio
                                    18 Jun 2018, 07:56

                                    @shivaVMC said in Qt 5.7 and cross compile:

                                    Unable to query physical screen size, defaulting to 100 dpi.

                                    This is not an error, you can safely ignore it.

                                    And if you want to solve it, just do what the next line says (export the 2 variables before launching your app).

                                    QFontDatabase: Cannot find font directory /usr/local/qt5pi/lib/fonts.
                                    Note that Qt no longer ships fonts. Deploy some (from http://dejavu-fonts.org for example) or switch to fontconfig.

                                    Here the error message mentions the solution, too. Just do what it says :-) Either put some fonts in the path where Qt is looking for them, or ship your own in a resource (QRC) with your app and install them at runtime.

                                    S Offline
                                    S Offline
                                    shivaVMC
                                    wrote on 19 Jun 2018, 06:21 last edited by
                                    #25

                                    @sierdzio
                                    Excellent Site...!!!
                                    The above suggestion worked out for me.
                                    Now,I m poting my Windows based developed Qt application to Linux,can you please suggest the best procedure to follow for quick porting.
                                    Thanks In advance.

                                    sierdzioS 1 Reply Last reply 19 Jun 2018, 06:28
                                    1
                                    • S shivaVMC
                                      19 Jun 2018, 06:21

                                      @sierdzio
                                      Excellent Site...!!!
                                      The above suggestion worked out for me.
                                      Now,I m poting my Windows based developed Qt application to Linux,can you please suggest the best procedure to follow for quick porting.
                                      Thanks In advance.

                                      sierdzioS Offline
                                      sierdzioS Offline
                                      sierdzio
                                      Moderators
                                      wrote on 19 Jun 2018, 06:28 last edited by
                                      #26

                                      @shivaVMC said in Qt 5.7 and cross compile:

                                      Now,I m poting my Windows based developed Qt application to Linux,can you please suggest the best procedure to follow for quick porting.

                                      That's worthy of a new thread. If you encounter any issues during porting, feel free to open a new topic and we'll try to help.

                                      In general, if your app only uses Qt APIs, then in most cases there is nothing to port. You need to compile your app and Linux and it will just work. If you do use some OS-specific APIs then each such case is different and it's impossible to give general advice on this.

                                      If you need to distribute your Linux app, take a look into linuxdeployqt, it's excellent for producing ready-to-run packages - and in case of issues the guy who wrote it is really helpful. AppImage output is built-in, and if you want to produce DEB and RPM packages, you can reuse linuxdeployqt's output using fpm. More info on how to do it: https://github.com/probonopd/linuxdeployqt/issues/9

                                      (Z(:^

                                      S 1 Reply Last reply 20 Jun 2018, 06:39
                                      0
                                      • sierdzioS sierdzio
                                        19 Jun 2018, 06:28

                                        @shivaVMC said in Qt 5.7 and cross compile:

                                        Now,I m poting my Windows based developed Qt application to Linux,can you please suggest the best procedure to follow for quick porting.

                                        That's worthy of a new thread. If you encounter any issues during porting, feel free to open a new topic and we'll try to help.

                                        In general, if your app only uses Qt APIs, then in most cases there is nothing to port. You need to compile your app and Linux and it will just work. If you do use some OS-specific APIs then each such case is different and it's impossible to give general advice on this.

                                        If you need to distribute your Linux app, take a look into linuxdeployqt, it's excellent for producing ready-to-run packages - and in case of issues the guy who wrote it is really helpful. AppImage output is built-in, and if you want to produce DEB and RPM packages, you can reuse linuxdeployqt's output using fpm. More info on how to do it: https://github.com/probonopd/linuxdeployqt/issues/9

                                        S Offline
                                        S Offline
                                        shivaVMC
                                        wrote on 20 Jun 2018, 06:39 last edited by
                                        #27

                                        @sierdzio
                                        Hi sierdzio,
                                        I have compiled the Windows Qt code,but I m facing issue as below.
                                        test.cpp:(.text+0x3b8): undefined reference to QwtScaleMap::setScaleInterval(double, double)' test.cpp:(.text+0x3c8): undefined reference to QwtScaleMap::setScaleInterval(double, double)'
                                        test.cpp:(.text+0x3e0): undefined reference to QwtScaleMap::setScaleInterval(double, double)' test.o: In function test::test(QWidget*)':
                                        test.cpp:(.text+0x494): undefined reference to QwtScaleMap::QwtScaleMap()' test.cpp:(.text+0x4a0): undefined reference to QwtScaleMap::QwtScaleMap()'
                                        test.cpp:(.text+0x4c0): undefined reference to QwtPlotCurve::QwtPlotCurve(QString const&)' test.cpp:(.text+0x554): undefined reference to QwtSymbol::QwtSymbol(QwtSymbol::Style, QBrush const&, QPen const&, QSize const&)'
                                        test.cpp:(.text+0x560): undefined reference to QwtPlotCurve::setSymbol(QwtSymbol*)' test.cpp:(.text+0x590): undefined reference to QwtPlotCurve::setPen(QColor const&, double, Qt::PenStyle)'
                                        test.cpp:(.text+0x59c): undefined reference to QwtPlotCurve::setStyle(QwtPlotCurve::CurveStyle)' test.cpp:(.text+0x610): undefined reference to QwtScaleMap::~QwtScaleMap()'
                                        test.cpp:(.text+0x618): undefined reference to QwtScaleMap::~QwtScaleMap()' test.cpp:(.text+0x64c): undefined reference to QwtPlotCurve::~QwtPlotCurve()'

                                        Exactly which library I need to add to avoid these error's.

                                        Please can I get suggestion/support on this?

                                        Thanks In addvance

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                                        • sierdzioS Offline
                                          sierdzioS Offline
                                          sierdzio
                                          Moderators
                                          wrote on 20 Jun 2018, 06:42 last edited by
                                          #28

                                          You need the Qwt library.

                                          But since it's not usually available on Windows, I suspect you already do have Qwt in your sources.

                                          (Z(:^

                                          S 1 Reply Last reply 20 Jun 2018, 06:51
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