View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0031680 | Community | OCCT:Configuration | public | 2020-07-21 14:32 | 2020-12-02 17:13 |
| Reporter | BenjaminBihler | Assigned To | bugmaster | ||
| Priority | normal | Severity | minor | ||
| Status | closed | Resolution | fixed | ||
| Platform | Mingw-w64 | OS | Windows | ||
| Product Version | 7.4.0 | ||||
| Target Version | 7.5.0 | Fixed in Version | 7.5.0 | ||
| Summary | 0031680: Configuration - Compilation Fails With G++ 10.1, LD 2.34 and Link-Time Optimization | ||||
| Description | When building OCCT with g++ 10.1, ld 2.34 and link-time optimization (-flto) using Mingw-w64 on Windows 10, I get the following error:C:/mingw-w64-10.1/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: LDOM_OSStream.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTV13LDOM_OSStream]+0x0): multiple definition of `VTT for LDOM_OSStream'; PCDM_ReadWriter.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTC13LDOM_OSStream0_So]+0x0): first defined here C:/mingw-w64-10.1/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: LDOM_OSStream.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTV13LDOM_OSStream]+0x0): multiple definition of `vtable for LDOM_OSStream'; PCDM_ReadWriter.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTC13LDOM_OSStream0_So]+0x0): first defined here C:/mingw-w64-10.1/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: LDOM_OSStream.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTV13LDOM_OSStream]+0x0): multiple definition of `construction vtable for std::ostream-in-LDOM_OSStream'; PCDM_ReadWriter.cxx.obj (symbol from plugin):(.gnu.linkonce.t._ZTV13LDOM_OSStream[_ZTC13LDOM_OSStream0_So]+0x0): first defined here I have found more "multiple definition" errors with this tool combination, but I do not fully understand the reason. See https://stackoverflow.com/questions/62150048/why-does-g-10-1-complain-about-a-named-lambda-in-a-header-file-and-others-do-n for another example. These errors haven't been there up to g++ 9.2 (I do not know the corresponding ld version number anymore), but appear here from g++ 10.1 on. This post: https://stackoverflow.com/a/57504289/2492801 explains how to force vtable generation. According to my understanding the vtable of LDOM_OSStream is generated in more than one compilation unit, since that class does not have a non-inline virtual function. Following the cited post, I propose to add a non-inline virtual destructor. Indeed this solves the compilation problems here. | ||||
| Steps To Reproduce | Not required | ||||
| Tags | No tags attached. | ||||
| Test case number | Not required | ||||
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Branch CR31680 has been created by BenjaminBihler. SHA-1: ca5ec1c316c7618a6ad46cd0f60662f7b3bfa48c Detailed log of new commits: Author: Benjamin Bihler Date: Tue Jul 21 13:37:03 2020 +0200 0031680: Configuration - Compilation Fails With G++ 10.1, LD 2.34 and Link-Time Optimization Added a non-inline empty virtual destructor to LDOM_OSStream to force vtable generation in one translation unit only. |
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Combination - OCCT branch : IR-2020-07-24 master SHA - 4c7a3faef5f292475c23ee615ad49d57fc039b58 a206de37fbfa0bf71bd534ae47192bbec23b8522 Products branch : IR-2020-07-24 SHA - be95aa91db3bd344c872901349e58022d3c687fc was compiled on Linux, MacOS and Windows platforms and tested in optimize mode. Number of compiler warnings: No new/fixed warnings Regressions/Differences/Improvements: No regressions/differences CPU differences: Debian80-64: OCCT Total CPU difference: 17271.39000000011 / 17230.04000000007 [+0.24%] Products Total CPU difference: 800.6699999999917 / 791.7399999999936 [+1.13%] Windows-64-VC14: OCCT Total CPU difference: 18742.140625 / 18745.390625 [-0.02%] Products Total CPU difference: 1329.234375 / 1321.390625 [+0.59%] Image differences : No differences that require special attention Memory differences : No differences that require special attention |
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Branch CR31680 has been deleted by inv. SHA-1: ca5ec1c316c7618a6ad46cd0f60662f7b3bfa48c |
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occt: master 6531dfea 2020-07-21 11:37:03 Committer: bugmaster Details Diff |
0031680: Configuration - Compilation Fails With G++ 10.1, LD 2.34 and Link-Time Optimization Added a non-inline empty virtual destructor to LDOM_OSStream to force vtable generation in one translation unit only. |
Affected Issues 0031680 |
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| mod - src/LDOM/LDOM_OSStream.cxx | Diff File | ||
| mod - src/LDOM/LDOM_OSStream.hxx | Diff File | ||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-07-21 14:32 | BenjaminBihler | New Issue | |
| 2020-07-21 14:32 | BenjaminBihler | Assigned To | => BenjaminBihler |
| 2020-07-21 14:38 | git | Note Added: 0093228 | |
| 2020-07-21 14:38 | BenjaminBihler | Assigned To | BenjaminBihler => bugmaster |
| 2020-07-21 14:38 | BenjaminBihler | Status | new => resolved |
| 2020-07-21 14:38 | BenjaminBihler | Steps to Reproduce Updated | |
| 2020-07-21 15:14 | kgv | Status | resolved => reviewed |
| 2020-07-25 13:21 | bugmaster | Note Added: 0093313 | |
| 2020-07-25 13:21 | bugmaster | Status | reviewed => tested |
| 2020-07-25 13:29 | bugmaster | Test case number | => Not required |
| 2020-07-25 13:57 | bugmaster | Changeset attached | => occt master 6531dfea |
| 2020-07-25 13:57 | bugmaster | Status | tested => verified |
| 2020-07-25 13:57 | bugmaster | Resolution | open => fixed |
| 2020-07-25 14:02 | git | Note Added: 0093336 | |
| 2020-12-02 16:43 |
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Fixed in Version | => 7.5.0 |
| 2020-12-02 17:13 |
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Status | verified => closed |
