#41 Visual Studio 2010 dll issue

[jeremy mangin]

Hi ,

downloaded the log4cpp-1.1.2rc3.tar and I have built the library in Visual Studio 2010. But when I try to build the project "testDLL" provided with the library, I have the following error:

error LNK2019: unresolved external symbol "public: thiscall log4cpp::Appender::AppenderMapStorageInitializer::AppenderMapStorageInitializer(void)" (??0AppenderMapStorageInitializer@Appender@log4cpp@@QAE@XZ) referenced in function "void cdecl log4cpp::`dynamic initializer for 'appenderMapStorageInitializer''(void)" (??__EappenderMapStorageInitializer@log4cpp@@YAXXZ)

error LNK2019: unresolved external symbol "public: thiscall log4cpp::Appender::AppenderMapStorageInitializer::~AppenderMapStorageInitializer(void)" (??1AppenderMapStorageInitializer@Appender@log4cpp@@QAE@XZ) referenced in function "void cdecl log4cpp::`dynamic atexit destructor for 'appenderMapStorageInitializer''(void)" (??__FappenderMapStorageInitializer@log4cpp@@YAXXZ)

I figured out that it is because the AppenderMapStorageInitializer() was not exported in the log4cpp.dll. I fixed it by adding LOG4CPP_EXPORT to the AppenderMapStorageInitializer class (in the Appender.hh file).

Am I the only one with this issue? If not can you fix the problem in the next log4cpp release?

Thanks !

Regards.

Jeremy

[Alexander Perepelkin]

Hello Jeremy,

I confirm that the error happens. It'll be fixed in next release.
Thanks for the report.

Alex.

[Abhishek Mishra]

Hi Alexander, I am getting the same error on version 1.1.3 (using as a Nuget package). I am using VS2019 for the development. Can you please look into this, and if possible please provide any workaround or fix ? Thanks in advance.

[Alexander Perepelkin]

Abhishek,

Have you tried it before with earlier versions (like Visual Studio 2010)? I wonder whether it is the change in IDE version which causes the error or the fix above is insufficient.

[Sanfour]

Hi Abhishek,
am using VS 2019 and downloaded it with Nuget package. you need the winsock lib, either you put it by putting ws2_32.lib in Project properties -> Linker-> input -> additional dependys or just add pragma comment(lib,"ws2_32.lib") to your code.