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Qt 5.11.3 works fine, but Qt 5.12.1 throws LINKER errors

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  • Christian EhrlicherC Christian Ehrlicher

    Maybe the function is not properly exported? Maybe take a look at the exported function declarations with Dependency Walker - make sure the export string (_imp?registerNetLibraryQML@NetLibrary@@YAXXZ) shown there looks exactly the same.

    M Offline
    M Offline
    m3g1dd
    wrote on last edited by
    #9

    @Christian-Ehrlicher

    Good idea :) I'm going to employ dependency walker tools

    1 Reply Last reply
    0
    • Christian EhrlicherC Christian Ehrlicher

      Maybe the function is not properly exported? Maybe take a look at the exported function declarations with Dependency Walker - make sure the export string (_imp?registerNetLibraryQML@NetLibrary@@YAXXZ) shown there looks exactly the same.

      M Offline
      M Offline
      m3g1dd
      wrote on last edited by
      #10

      @Christian-Ehrlicher

      I double-checked my netlib DLL with dependency walker, I can see the export:

      0_1552303570459_5fc43f6a-1a49-4307-b5b4-156b5e8b1a6c-image.png

      Also, on my main.obj I can see the import:

      0_1552303780368_7fcee3d7-1947-477a-8391-4ff3c54e5ef9-image.png

      hskoglundH 1 Reply Last reply
      0
      • Christian EhrlicherC Offline
        Christian EhrlicherC Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #11

        I've no idea - does the linker really links against the import lib? Are other functions from within the library are resolved?

        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
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        M 1 Reply Last reply
        0
        • M m3g1dd

          @Christian-Ehrlicher

          I double-checked my netlib DLL with dependency walker, I can see the export:

          0_1552303570459_5fc43f6a-1a49-4307-b5b4-156b5e8b1a6c-image.png

          Also, on my main.obj I can see the import:

          0_1552303780368_7fcee3d7-1947-477a-8391-4ff3c54e5ef9-image.png

          hskoglundH Offline
          hskoglundH Offline
          hskoglund
          wrote on last edited by
          #12

          @m3g1dd While checking the netlib DLL is a good thing for avoiding failures when launching your application.exe (when the .dll is loaded), here the error occurs not when running the app, but when linking it, So the .dll is immaterial, you could instead check the netlib.lib file, that's what the linker is reading.

          Dependency Walker isn't well suited for reading .lib files, but there's a tool in MSVC2017 called dumpbin, easiest is to start it from a Developer Command Prompt for VS 2017. To get the complete information, use the /linkermember switch, say like this:

          dumpbin /linkermember netlib.lib
          

          Then check in the list if that symbol is exported, it should be 2 of them, one __imp?registerNetLibraryQML@NetLibrary@@YAXXZ and one ?registerNetLibraryQML@NetLibrary@@YAXXZ

          M 1 Reply Last reply
          3
          • hskoglundH hskoglund

            @m3g1dd While checking the netlib DLL is a good thing for avoiding failures when launching your application.exe (when the .dll is loaded), here the error occurs not when running the app, but when linking it, So the .dll is immaterial, you could instead check the netlib.lib file, that's what the linker is reading.

            Dependency Walker isn't well suited for reading .lib files, but there's a tool in MSVC2017 called dumpbin, easiest is to start it from a Developer Command Prompt for VS 2017. To get the complete information, use the /linkermember switch, say like this:

            dumpbin /linkermember netlib.lib
            

            Then check in the list if that symbol is exported, it should be 2 of them, one __imp?registerNetLibraryQML@NetLibrary@@YAXXZ and one ?registerNetLibraryQML@NetLibrary@@YAXXZ

            M Offline
            M Offline
            m3g1dd
            wrote on last edited by m3g1dd
            #13

            @hskoglund

            Thanks! I run the command on Developer Command Prompt for VS 2017 and I get the results, I can see both ?registerNetLibraryQML@NetLibrary@@YAXXZ and __imp_?registerNetLibraryQML@NetLibrary@@YAXXZ expressions:

            C:\Users\me\repos\build-application-Desktop_Qt_5_12_1_MSVC2017_64bit-Debug\netlib\debug>dumpbin /linkermember netlib.lib
            Microsoft (R) COFF/PE Dumper Version 14.15.26730.0
            Copyright (C) Microsoft Corporation.  All rights reserved.
            
            
            Dump of file netlib.lib
            
            File Type: LIBRARY
            
            Archive member name at 8: /
            FFFFFFFF time/date
                     uid
                     gid
                   0 mode
                 C3D size
            correct header end
            
                69 public symbols
            
                 190A __IMPORT_DESCRIPTOR_netlib
                 1B30 __NULL_IMPORT_DESCRIPTOR
                 1C66 netlib_NULL_THUNK_DATA
                 2878 ?registerNetLibraryQML@NetLibrary@@YAXXZ
                 2878 __imp_?registerNetLibraryQML@NetLibrary@@YAXXZ
                 2E0C ?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                 2E0C __imp_?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                 2E8A ?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                 2E8A __imp_?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                 1DBE ??0Netlib@@QEAA@XZ
                 1DBE __imp_??0Netlib@@QEAA@XZ
                 1E2C ??1Netlib@@UEAA@XZ
                 1E2C __imp_??1Netlib@@UEAA@XZ
                 1F06 ?agentDiscover@Netlib@@QEAAXXZ
                 1F06 __imp_?agentDiscover@Netlib@@QEAAXXZ
                 1FFA ?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                 1FFA __imp_?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                 210E ?discoveryInProgress@Netlib@@QEBA_NXZ
                 210E __imp_?discoveryInProgress@Netlib@@QEBA_NXZ
                 28FC ?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                 28FC __imp_?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                 2C7E ?slicingInProgress@Netlib@@QEBA_NXZ
                 2C7E __imp_?slicingInProgress@Netlib@@QEBA_NXZ
                 2A82 ?setSlicingInProgress@Netlib@@QEAAX_N@Z
                 2A82 __imp_?setSlicingInProgress@Netlib@@QEAAX_N@Z
                 2530 ?layerID@Netlib@@QEBA?AVQString@@XZ
                 2530 __imp_?layerID@Netlib@@QEBA?AVQString@@XZ
                 2982 ?setLayerID@Netlib@@QEAAXVQString@@@Z
                 2982 __imp_?setLayerID@Netlib@@QEAAXVQString@@@Z
                 2B82 ?slicingDone@Netlib@@QEBA_NXZ
                 2B82 __imp_?slicingDone@Netlib@@QEBA_NXZ
                 2A04 ?setSlicingDone@Netlib@@QEAAX_N@Z
                 2A04 __imp_?setSlicingDone@Netlib@@QEAAX_N@Z
                 24BE ?init@Netlib@@AEAAXXZ
                 24BE __imp_?init@Netlib@@AEAAXXZ
                 22AA ?getOsName@Netlib@@AEAA?AVQString@@XZ
                 22AA __imp_?getOsName@Netlib@@AEAA?AVQString@@XZ
                 2090 ?discoveryFinished@Netlib@@AEAAXXZ
                 2090 __imp_?discoveryFinished@Netlib@@AEAAXXZ
                 2B06 ?slicerFinished@Netlib@@AEAAXXZ
                 2B06 __imp_?slicerFinished@Netlib@@AEAAXXZ
                 1F80 ?agentLogReady@Netlib@@AEAAXXZ
                 1F80 __imp_?agentLogReady@Netlib@@AEAAXXZ
                 2430 ?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                 2430 __imp_?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                 232C ?getSlicerProgress@Netlib@@AEAAXXZ
                 232C __imp_?getSlicerProgress@Netlib@@AEAAXXZ
                 23AA ?getSlicerProgressFinished@Netlib@@AEAAXXZ
                 23AA __imp_?getSlicerProgressFinished@Netlib@@AEAAXXZ
                 1E9A __imp_??_7Netlib@@6B@
                 2636 ?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                 2636 __imp_?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                 2752 ?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                 2752 __imp_?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                 26BE ?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                 26BE __imp_?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                 27D2 ?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                 27D2 __imp_?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                 2190 ?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                 2190 __imp_?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                 221A ?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                 221A __imp_?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                 2CFE ?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                 2CFE __imp_?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                 25B0 ?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                 25B0 __imp_?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                 2BFC ?slicingDoneChanged@Netlib@@QEAAX_N@Z
                 2BFC __imp_?slicingDoneChanged@Netlib@@QEAAX_N@Z
                 2D86 __imp_?staticMetaObject@Netlib@@2UQMetaObject@@B
            
            Archive member name at C82: /
            FFFFFFFF time/date
                     uid
                     gid
                   0 mode
                 C4B size
            correct header end
            
                37 offsets
            
                    1     190A
                    2     1B30
                    3     1C66
                    4     2878
                    5     2E0C
                    6     2E8A
                    7     1DBE
                    8     1E2C
                    9     1F06
                    A     1FFA
                    B     210E
                    C     28FC
                    D     2C7E
                    E     2A82
                    F     2530
                   10     2982
                   11     2B82
                   12     2A04
                   13     24BE
                   14     22AA
                   15     2090
                   16     2B06
                   17     1F80
                   18     2430
                   19     232C
                   1A     23AA
                   1B     1E9A
                   1C     2636
                   1D     2752
                   1E     26BE
                   1F     27D2
                   20     2190
                   21     221A
                   22     2CFE
                   23     25B0
                   24     2BFC
                   25     2D86
            
                69 public symbols
            
                    7 ??0Netlib@@QEAA@XZ
                    8 ??1Netlib@@UEAA@XZ
                    9 ?agentDiscover@Netlib@@QEAAXXZ
                   17 ?agentLogReady@Netlib@@AEAAXXZ
                    A ?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                   15 ?discoveryFinished@Netlib@@AEAAXXZ
                    B ?discoveryInProgress@Netlib@@QEBA_NXZ
                   20 ?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                   21 ?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                   14 ?getOsName@Netlib@@AEAA?AVQString@@XZ
                   19 ?getSlicerProgress@Netlib@@AEAAXXZ
                   1A ?getSlicerProgressFinished@Netlib@@AEAAXXZ
                   18 ?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                   13 ?init@Netlib@@AEAAXXZ
                    F ?layerID@Netlib@@QEBA?AVQString@@XZ
                   23 ?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                   1C ?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                   1E ?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                   1D ?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                   1F ?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                    4 ?registerNetLibraryQML@NetLibrary@@YAXXZ
                    C ?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                   10 ?setLayerID@Netlib@@QEAAXVQString@@@Z
                   12 ?setSlicingDone@Netlib@@QEAAX_N@Z
                    E ?setSlicingInProgress@Netlib@@QEAAX_N@Z
                   16 ?slicerFinished@Netlib@@AEAAXXZ
                   11 ?slicingDone@Netlib@@QEBA_NXZ
                   24 ?slicingDoneChanged@Netlib@@QEAAX_N@Z
                    D ?slicingInProgress@Netlib@@QEBA_NXZ
                   22 ?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                    5 ?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                    6 ?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                    1 __IMPORT_DESCRIPTOR_netlib
                    2 __NULL_IMPORT_DESCRIPTOR
                    7 __imp_??0Netlib@@QEAA@XZ
                    8 __imp_??1Netlib@@UEAA@XZ
                   1B __imp_??_7Netlib@@6B@
                    9 __imp_?agentDiscover@Netlib@@QEAAXXZ
                   17 __imp_?agentLogReady@Netlib@@AEAAXXZ
                    A __imp_?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                   15 __imp_?discoveryFinished@Netlib@@AEAAXXZ
                    B __imp_?discoveryInProgress@Netlib@@QEBA_NXZ
                   20 __imp_?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                   21 __imp_?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                   14 __imp_?getOsName@Netlib@@AEAA?AVQString@@XZ
                   19 __imp_?getSlicerProgress@Netlib@@AEAAXXZ
                   1A __imp_?getSlicerProgressFinished@Netlib@@AEAAXXZ
                   18 __imp_?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                   13 __imp_?init@Netlib@@AEAAXXZ
                    F __imp_?layerID@Netlib@@QEBA?AVQString@@XZ
                   23 __imp_?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                   1C __imp_?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                   1E __imp_?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                   1D __imp_?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                   1F __imp_?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                    4 __imp_?registerNetLibraryQML@NetLibrary@@YAXXZ
                    C __imp_?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                   10 __imp_?setLayerID@Netlib@@QEAAXVQString@@@Z
                   12 __imp_?setSlicingDone@Netlib@@QEAAX_N@Z
                    E __imp_?setSlicingInProgress@Netlib@@QEAAX_N@Z
                   16 __imp_?slicerFinished@Netlib@@AEAAXXZ
                   11 __imp_?slicingDone@Netlib@@QEBA_NXZ
                   24 __imp_?slicingDoneChanged@Netlib@@QEAAX_N@Z
                    D __imp_?slicingInProgress@Netlib@@QEBA_NXZ
                   22 __imp_?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                   25 __imp_?staticMetaObject@Netlib@@2UQMetaObject@@B
                    5 __imp_?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                    6 __imp_?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                    3 netlib_NULL_THUNK_DATA
            
              Summary
            
                      C0 .debug$S
                      14 .idata$2
                      14 .idata$3
                       8 .idata$4
                       8 .idata$5
                       C .idata$6
            
            1 Reply Last reply
            0
            • Christian EhrlicherC Christian Ehrlicher

              I've no idea - does the linker really links against the import lib? Are other functions from within the library are resolved?

              M Offline
              M Offline
              m3g1dd
              wrote on last edited by
              #14

              @Christian-Ehrlicher

              Thanks! Yes, other functions of netlib are linked fine. I will update if I figure out the cause :)

              1 Reply Last reply
              0
              • hskoglundH Offline
                hskoglundH Offline
                hskoglund
                wrote on last edited by
                #15

                Hi, just to check, what version of MSVC did you use for Qt 5.11.3 (when the linking worked), was it MSVC 2017 32-bit or MSVC 2017 64-bit?

                M 1 Reply Last reply
                0
                • hskoglundH hskoglund

                  Hi, just to check, what version of MSVC did you use for Qt 5.11.3 (when the linking worked), was it MSVC 2017 32-bit or MSVC 2017 64-bit?

                  M Offline
                  M Offline
                  m3g1dd
                  wrote on last edited by
                  #16

                  @hskoglund

                  Hi! Thanks for follow up :)

                  For Qt 5.11.3 I'm using MSVC2017_64bit which works fine. My build directories are:

                  build-application-Desktop_Qt_5_11_3_MSVC2017_64bit-Debug
                  build-application-Desktop_Qt_5_11_3_MSVC2017_64bit-Release
                  build-application-Desktop_Qt_5_12_1_MSVC2017_64bit-Debug
                  
                  1 Reply Last reply
                  0
                  • M Offline
                    M Offline
                    m3g1dd
                    wrote on last edited by m3g1dd
                    #17

                    New observation: I installed Qt5.12.0 and my application compiles/links/runs just fine. I'm going to re-install Qt5.12.1 ... I have a feeling maybe re-installing it will resolve linker errors ... lets see ...

                    1 Reply Last reply
                    0
                    • M Offline
                      M Offline
                      m3g1dd
                      wrote on last edited by
                      #18

                      I reinstalled Qt 5.12.1 but it still throws the above-mentioned linker error. So basically, my observation is:

                      1. On Windows, Qt 5.11.3 and 5.12.0 work fine
                      2. On Windows, Qt 5.12.1 throws linker error
                      3. On Linux openSUSE Leap 15, Qt 5.12.1 works fine
                      1 Reply Last reply
                      0
                      • hskoglundH Offline
                        hskoglundH Offline
                        hskoglund
                        wrote on last edited by
                        #19

                        Hmm, just to check again: release builds and debug builds on 5.12.0 MSVC 2017 links fine and dandy, but the same linker throws a tantrum both for release and debug builds on 5.12.1 MSVC 2017.

                        Also, could do you a similar dumpbin on a 5.12.0 debug built netlib.lib as you did above for a 5.12.1 debug build?

                        M 2 Replies Last reply
                        2
                        • hskoglundH hskoglund

                          Hmm, just to check again: release builds and debug builds on 5.12.0 MSVC 2017 links fine and dandy, but the same linker throws a tantrum both for release and debug builds on 5.12.1 MSVC 2017.

                          Also, could do you a similar dumpbin on a 5.12.0 debug built netlib.lib as you did above for a 5.12.1 debug build?

                          M Offline
                          M Offline
                          m3g1dd
                          wrote on last edited by
                          #20

                          @hskoglund

                          Let me double-check everything again ... I'll give an update ...

                          1 Reply Last reply
                          0
                          • hskoglundH hskoglund

                            Hmm, just to check again: release builds and debug builds on 5.12.0 MSVC 2017 links fine and dandy, but the same linker throws a tantrum both for release and debug builds on 5.12.1 MSVC 2017.

                            Also, could do you a similar dumpbin on a 5.12.0 debug built netlib.lib as you did above for a 5.12.1 debug build?

                            M Offline
                            M Offline
                            m3g1dd
                            wrote on last edited by
                            #21

                            @hskoglund

                            I double-checked to make sure nothing is missed:

                            1. Qt_5_12_0_MSVC2017_64bit-Debug links fine and application runs :)
                            2. Qt_5_12_0_MSVC2017_64bit-Release links fine and application runs :)
                            3. Qt_5_12_1_MSVC2017_64bit-Debug throws:

                            main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl NetLibrary::registerNetLibraryQML(void)" (_imp?registerNetLibraryQML@NetLibrary@@YAXXZ) referenced in function main

                            1. Qt_5_12_1_MSVC2017_64bit-Release throws:

                            main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl NetLibrary::registerNetLibraryQML(void)" (_imp?registerNetLibraryQML@NetLibrary@@YAXXZ) referenced in function main


                            Also, here is the dumpbin for netlib.lib on Qt_5_12_0_MSVC2017_64bit-Debug which links fine and works nice:

                            C:\Users\me\repos\build-application-Desktop_Qt_5_12_0_MSVC2017_64bit-Debug\netlib\debug>dumpbin /linkermember netlib.lib
                            Microsoft (R) COFF/PE Dumper Version 14.15.26730.0
                            Copyright (C) Microsoft Corporation.  All rights reserved.
                            
                            
                            Dump of file netlib.lib
                            
                            File Type: LIBRARY
                            
                            Archive member name at 8: /
                            FFFFFFFF time/date
                                     uid
                                     gid
                                   0 mode
                                 C3D size
                            correct header end
                            
                                69 public symbols
                            
                                 190A __IMPORT_DESCRIPTOR_netlib
                                 1B30 __NULL_IMPORT_DESCRIPTOR
                                 1C66 netlib_NULL_THUNK_DATA
                                 2878 ?registerNetLibraryQML@NetLibrary@@YAXXZ
                                 2878 __imp_?registerNetLibraryQML@NetLibrary@@YAXXZ
                                 2E0C ?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                                 2E0C __imp_?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                                 2E8A ?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                                 2E8A __imp_?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                                 1DBE ??0Netlib@@QEAA@XZ
                                 1DBE __imp_??0Netlib@@QEAA@XZ
                                 1E2C ??1Netlib@@UEAA@XZ
                                 1E2C __imp_??1Netlib@@UEAA@XZ
                                 1F06 ?agentDiscover@Netlib@@QEAAXXZ
                                 1F06 __imp_?agentDiscover@Netlib@@QEAAXXZ
                                 1FFA ?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                                 1FFA __imp_?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                                 210E ?discoveryInProgress@Netlib@@QEBA_NXZ
                                 210E __imp_?discoveryInProgress@Netlib@@QEBA_NXZ
                                 28FC ?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                                 28FC __imp_?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                                 2C7E ?slicingInProgress@Netlib@@QEBA_NXZ
                                 2C7E __imp_?slicingInProgress@Netlib@@QEBA_NXZ
                                 2A82 ?setSlicingInProgress@Netlib@@QEAAX_N@Z
                                 2A82 __imp_?setSlicingInProgress@Netlib@@QEAAX_N@Z
                                 2530 ?layerID@Netlib@@QEBA?AVQString@@XZ
                                 2530 __imp_?layerID@Netlib@@QEBA?AVQString@@XZ
                                 2982 ?setLayerID@Netlib@@QEAAXVQString@@@Z
                                 2982 __imp_?setLayerID@Netlib@@QEAAXVQString@@@Z
                                 2B82 ?slicingDone@Netlib@@QEBA_NXZ
                                 2B82 __imp_?slicingDone@Netlib@@QEBA_NXZ
                                 2A04 ?setSlicingDone@Netlib@@QEAAX_N@Z
                                 2A04 __imp_?setSlicingDone@Netlib@@QEAAX_N@Z
                                 24BE ?init@Netlib@@AEAAXXZ
                                 24BE __imp_?init@Netlib@@AEAAXXZ
                                 22AA ?getOsName@Netlib@@AEAA?AVQString@@XZ
                                 22AA __imp_?getOsName@Netlib@@AEAA?AVQString@@XZ
                                 2090 ?discoveryFinished@Netlib@@AEAAXXZ
                                 2090 __imp_?discoveryFinished@Netlib@@AEAAXXZ
                                 2B06 ?slicerFinished@Netlib@@AEAAXXZ
                                 2B06 __imp_?slicerFinished@Netlib@@AEAAXXZ
                                 1F80 ?agentLogReady@Netlib@@AEAAXXZ
                                 1F80 __imp_?agentLogReady@Netlib@@AEAAXXZ
                                 2430 ?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                                 2430 __imp_?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                                 232C ?getSlicerProgress@Netlib@@AEAAXXZ
                                 232C __imp_?getSlicerProgress@Netlib@@AEAAXXZ
                                 23AA ?getSlicerProgressFinished@Netlib@@AEAAXXZ
                                 23AA __imp_?getSlicerProgressFinished@Netlib@@AEAAXXZ
                                 1E9A __imp_??_7Netlib@@6B@
                                 2636 ?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                                 2636 __imp_?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                                 2752 ?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                                 2752 __imp_?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                                 26BE ?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                                 26BE __imp_?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                                 27D2 ?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                                 27D2 __imp_?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                                 2190 ?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                                 2190 __imp_?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                                 221A ?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                                 221A __imp_?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                                 2CFE ?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                                 2CFE __imp_?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                                 25B0 ?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                                 25B0 __imp_?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                                 2BFC ?slicingDoneChanged@Netlib@@QEAAX_N@Z
                                 2BFC __imp_?slicingDoneChanged@Netlib@@QEAAX_N@Z
                                 2D86 __imp_?staticMetaObject@Netlib@@2UQMetaObject@@B
                            
                            Archive member name at C82: /
                            FFFFFFFF time/date
                                     uid
                                     gid
                                   0 mode
                                 C4B size
                            correct header end
                            
                                37 offsets
                            
                                    1     190A
                                    2     1B30
                                    3     1C66
                                    4     2878
                                    5     2E0C
                                    6     2E8A
                                    7     1DBE
                                    8     1E2C
                                    9     1F06
                                    A     1FFA
                                    B     210E
                                    C     28FC
                                    D     2C7E
                                    E     2A82
                                    F     2530
                                   10     2982
                                   11     2B82
                                   12     2A04
                                   13     24BE
                                   14     22AA
                                   15     2090
                                   16     2B06
                                   17     1F80
                                   18     2430
                                   19     232C
                                   1A     23AA
                                   1B     1E9A
                                   1C     2636
                                   1D     2752
                                   1E     26BE
                                   1F     27D2
                                   20     2190
                                   21     221A
                                   22     2CFE
                                   23     25B0
                                   24     2BFC
                                   25     2D86
                            
                                69 public symbols
                            
                                    7 ??0Netlib@@QEAA@XZ
                                    8 ??1Netlib@@UEAA@XZ
                                    9 ?agentDiscover@Netlib@@QEAAXXZ
                                   17 ?agentLogReady@Netlib@@AEAAXXZ
                                    A ?agentSlice@Netlib@@QEAA_NAEBVQUrl@@AEBVQString@@V3@222@Z
                                   15 ?discoveryFinished@Netlib@@AEAAXXZ
                                    B ?discoveryInProgress@Netlib@@QEBA_NXZ
                                   20 ?discoveryInProgressChanged@Netlib@@QEAAX_N@Z
                                   21 ?discoveryResultChanged@Netlib@@QEAAXVQJsonArray@@@Z
                                   14 ?getOsName@Netlib@@AEAA?AVQString@@XZ
                                   19 ?getSlicerProgress@Netlib@@AEAAXXZ
                                   1A ?getSlicerProgressFinished@Netlib@@AEAAXXZ
                                   18 ?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                                   13 ?init@Netlib@@AEAAXXZ
                                    F ?layerID@Netlib@@QEBA?AVQString@@XZ
                                   23 ?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                                   1C ?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                                   1E ?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                                   1D ?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                                   1F ?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                                    4 ?registerNetLibraryQML@NetLibrary@@YAXXZ
                                    C ?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                                   10 ?setLayerID@Netlib@@QEAAXVQString@@@Z
                                   12 ?setSlicingDone@Netlib@@QEAAX_N@Z
                                    E ?setSlicingInProgress@Netlib@@QEAAX_N@Z
                                   16 ?slicerFinished@Netlib@@AEAAXXZ
                                   11 ?slicingDone@Netlib@@QEBA_NXZ
                                   24 ?slicingDoneChanged@Netlib@@QEAAX_N@Z
                                    D ?slicingInProgress@Netlib@@QEBA_NXZ
                                   22 ?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                                    5 ?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                                    6 ?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                                    1 __IMPORT_DESCRIPTOR_netlib
                                    2 __NULL_IMPORT_DESCRIPTOR
                                    7 __imp_??0Netlib@@QEAA@XZ
                                    8 __imp_??1Netlib@@UEAA@XZ
                                   1B __imp_??_7Netlib@@6B@
                                    9 __imp_?agentDiscover@Netlib@@QEAAXXZ
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                                   15 __imp_?discoveryFinished@Netlib@@AEAAXXZ
                                    B __imp_?discoveryInProgress@Netlib@@QEBA_NXZ
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                                   14 __imp_?getOsName@Netlib@@AEAA?AVQString@@XZ
                                   19 __imp_?getSlicerProgress@Netlib@@AEAAXXZ
                                   1A __imp_?getSlicerProgressFinished@Netlib@@AEAAXXZ
                                   18 __imp_?handleSlicingInProgressChanged@Netlib@@AEAAX_N@Z
                                   13 __imp_?init@Netlib@@AEAAXXZ
                                    F __imp_?layerID@Netlib@@QEBA?AVQString@@XZ
                                   23 __imp_?layerIDChanged@Netlib@@QEAAXVQString@@@Z
                                   1C __imp_?metaObject@Netlib@@UEBAPEBUQMetaObject@@XZ
                                   1E __imp_?qt_metacall@Netlib@@UEAAHW4Call@QMetaObject@@HPEAPEAX@Z
                                   1D __imp_?qt_metacast@Netlib@@UEAAPEAXPEBD@Z
                                   1F __imp_?qt_static_metacall@Netlib@@CAXPEAVQObject@@W4Call@QMetaObject@@HPEAPEAX@Z
                                    4 __imp_?registerNetLibraryQML@NetLibrary@@YAXXZ
                                    C __imp_?setDiscoveryInProgress@Netlib@@QEAAX_N@Z
                                   10 __imp_?setLayerID@Netlib@@QEAAXVQString@@@Z
                                   12 __imp_?setSlicingDone@Netlib@@QEAAX_N@Z
                                    E __imp_?setSlicingInProgress@Netlib@@QEAAX_N@Z
                                   16 __imp_?slicerFinished@Netlib@@AEAAXXZ
                                   11 __imp_?slicingDone@Netlib@@QEBA_NXZ
                                   24 __imp_?slicingDoneChanged@Netlib@@QEAAX_N@Z
                                    D __imp_?slicingInProgress@Netlib@@QEBA_NXZ
                                   22 __imp_?slicingInProgressChanged@Netlib@@QEAAX_N@Z
                                   25 __imp_?staticMetaObject@Netlib@@2UQMetaObject@@B
                                    5 __imp_?tr@Netlib@@SA?AVQString@@PEBD0H@Z
                                    6 __imp_?trUtf8@Netlib@@SA?AVQString@@PEBD0H@Z
                                    3 netlib_NULL_THUNK_DATA
                            
                              Summary
                            
                                      C0 .debug$S
                                      14 .idata$2
                                      14 .idata$3
                                       8 .idata$4
                                       8 .idata$5
                                       C .idata$6
                            
                            1 Reply Last reply
                            0
                            • hskoglundH Offline
                              hskoglundH Offline
                              hskoglund
                              wrote on last edited by
                              #22

                              Hi, the dumpbin for 5.12.1 is identical to 5.12.0. Seems netlib.lib is the innocent guy here. So it must be the client program, i.e. your main.cpp, perhaps some kind of visibility problem. We're running out of options so I'm thinking you could try renaming your library to something less generic/vanilla (there are many other libraries called netlib.xxx out there, perhaps one of them has snuck into in 5.12.1)

                              So say instead of netlib you could call it m3gnetlib (prefixing with half of your username).
                              That would mean changing the .pro file, the .h and .cpp files and also the #define from NETLIBSHARED_EXPORT to M3GNETLIBSHARED_EXPORT.

                              I remember running into similar inexplicable issues in the past, and renaming the files helped (sometimes :-)

                              1 Reply Last reply
                              2
                              • M Offline
                                M Offline
                                mchinand
                                wrote on last edited by mchinand
                                #23

                                In 5.12.1, default Windows library paths (e.g., Windows Kits) were added to the search path in qmake's makefile generator, but were added before the user-specified paths instead of after. There's already a commit to fix this and should be in 5.12.3. See this bugreport

                                1 Reply Last reply
                                4
                                • hskoglundH Offline
                                  hskoglundH Offline
                                  hskoglund
                                  wrote on last edited by
                                  #24

                                  Thanks @mchinand!

                                  In Qt 5.12.1 @m3g1dd 's netlib.lib gets muscled out by the big wheels at Microsoft, when I do a dir of the Windows Kits on my C: indeed there's a netlib.lib there. And that's what the linker tries to link with.

                                  So either as I mentioned above go do that renaming, or wait for 5.12.3.

                                  M 1 Reply Last reply
                                  3
                                  • hskoglundH hskoglund

                                    Thanks @mchinand!

                                    In Qt 5.12.1 @m3g1dd 's netlib.lib gets muscled out by the big wheels at Microsoft, when I do a dir of the Windows Kits on my C: indeed there's a netlib.lib there. And that's what the linker tries to link with.

                                    So either as I mentioned above go do that renaming, or wait for 5.12.3.

                                    M Offline
                                    M Offline
                                    m3g1dd
                                    wrote on last edited by m3g1dd
                                    #25

                                    @hskoglund

                                    Hi, Thanks! Problem got resolved by renaming the netlib library to netagentlib, and Qt 5.12.1 builds and runs the application without any issue.

                                    These are all my code changes to rename the library:

                                    On my netlib library project file i.e. netlib.pro file I changed:

                                    -TARGET = netlib
                                    +TARGET = netagentlib
                                    

                                    Also, on my application executable project *.pro file I replaced these lines:

                                    win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../netlib/release/ -lnetlib
                                    else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../netlib/debug/ -lnetlib
                                    else:unix: LIBS += -L$$OUT_PWD/../netlib/ -lnetlib
                                    

                                    with these lines:

                                    win32:CONFIG(release, debug|release): LIBS += -L$$OUT_PWD/../netlib/release/ -lnetagentlib
                                    else:win32:CONFIG(debug, debug|release): LIBS += -L$$OUT_PWD/../netlib/debug/ -lnetagentlib
                                    else:unix: LIBS += -L$$OUT_PWD/../netlib/ -lnetagentlib
                                    
                                    1 Reply Last reply
                                    2

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