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  4. Qt 5.11.3 works fine, but Qt 5.12.1 throws LINKER errors
Forum Update on Monday, May 27th 2025

Qt 5.11.3 works fine, but Qt 5.12.1 throws LINKER errors

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  • Christian EhrlicherC Christian Ehrlicher

    MSVC needs the correct path instead -L and -l afaik
    https://doc.qt.io/qt-5/qmake-variable-reference.html#libs

    M Offline
    M Offline
    m3g1dd
    wrote on last edited by
    #7

    @Christian-Ehrlicher

    Thanks :) The strange point is that I have two more libraries which I'm linking against with the same approach without any issue. But only this net library is giving me troubles!

    1 Reply Last reply
    0
    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #8

      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.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
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      M 2 Replies Last reply
      2
      • 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 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
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                                     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
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                                     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
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                                       13     24BE
                                       14     22AA
                                       15     2090
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                                       18     2430
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                                       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
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                                        9 __imp_?agentDiscover@Netlib@@QEAAXXZ
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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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