D2 channel error gdc - undefined link to `_D3std6stdint12__ModuleInfoZ`

Question

I am using https://bitbucket.org/goshawk/gdc/downloads/gcc-4.5.2-tdm-1-gdc-r575-20110723.zip with TDM GCC 4.5.2 in -v2 mode to create a DLL. In one of the modules, I do import std.stdint . So I thought I needed to link to libgphobos2 to fix this, but it gives me even more errors:

 c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `D4core6thread6Thread6__ctorMFZC4core6thread6Thread': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function ` thread_entryPoint@4 ': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:173: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:173: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:173: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `D4core6thread6Thread6__ctorMFZC4core6thread6Thread': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `thread_attachThis': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1957: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `D4core6thread6Thread6__ctorMFZC4core6thread6Thread': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `thread_attachByAddrB': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:2048: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `D4core6thread18thread_getTLSBlockFZAv': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:2632: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:2632: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:2632: undefined reference to `__emutls_v._tlsstart' c:/mingw32/bin/../lib/gcc/mingw32/4.5.2/../../../libgphobos2.a(thread.o): In function `D4core6thread6Thread6__ctorMFZC4core6thread6Thread': C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsend' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' C:\crossdev\gdc\v2\build\mingw32\libphobos/../../../gcc-4.5.2/libphobos/core/thread.d:1363: undefined reference to `__emutls_v._tlsstart' 

Is this a bug or do I need to pass some extra flags to gdc?

Answer 1

I also experimented with GDC from bitbucket sources in -v2 mode to compile the library, trying to associate some D functions with a C ++ application.

I found the same problem with a missing link to _tlsstart and _tlsend. A partial solution is to include the "main" function in the library:

 void main(){} 

I am working with a static library in linux. I checked the resulting static library with:

 nm libDexample.a 

This shows that the above trivial basic inserts of extra characters in libDexample.d (which are also included in the C ++ executable):

 _Dmain _tlsend _tlsstart 

Of course, these symbols give reference errors related to several definitions if the library is used in Appendix D. Therefore, you can define a separate library, for example libtls.d, containing:

 extern(C) void make_it_link_please(){} //inserts the _tlsstart and _tlsend stuff??????? void main() { } 

If one of the links is related to libtls in the case of a C ++ application, but not to the D application.