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From Imre András <ia...@freemail.hu>
Subject Re: Unresolved external symbol errors when linking example native c++ code that uses jcc
Date Thu, 21 Oct 2010 17:00:37 GMT
JCCEnv.h has the following:

...
#ifdef _jcc_shared
_DLL_IMPORT extern JCCEnv *env;
_DLL_IMPORT extern DWORD VM_ENV;
#else
_DLL_EXPORT extern JCCEnv *env;
_DLL_EXPORT extern DWORD VM_ENV;
#endif
...

I suspect here is the root of my linker problem. Where should this *env get resolved?


Thanks,
  András


"Imre András" <iar73@freemail.hu> írta:
>Hi list,>
>
I intend to use jcc to ease calling Java code from native code. I managed to build and install
it. Now I try to build my first test code from within MS VS 2010 Win32 console app project.
Despite setting up the libs and includes I still get linker errors:>
>
------------------------------------------------------------------>
Link:>
C:\Program Files\Microsoft Visual Studio 10.0\VC\bin\link.exe /ERRORREPORT:PROMPT /OUT:"C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.exe"
/INCREMENTAL /NOLOGO python27.lib _jcc.lib jvm.lib kernel32.lib user32.lib gdi32.lib winspool.lib
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib
kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib
oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /MANIFEST /ManifestFile:"Debug\jcc.exe.intermediate.manifest"
/MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.pdb"
/SUBSYSTEM:CONSOLE /TLBID:1 /DYNAMICBASE /NXCOMPAT /IMPLIB:"C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.lib"
/MACHINE:X86 Debug\jcc.exe.embed.manifest.res>
Debug\jcc.obj>
Debug\stdafx.obj>
Debug\__wrap__.obj>
Creating library C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.lib and object C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.exp>
1>jcc.obj : error LNK2001: unresolved external symbol "unsigned long VM_ENV" (?VM_ENV@@3KA)>
1>stdafx.obj : error LNK2001: unresolved external symbol "unsigned long VM_ENV" (?VM_ENV@@3KA)>
1>__wrap__.obj : error LNK2001: unresolved external symbol "unsigned long VM_ENV" (?VM_ENV@@3KA)>
1>jcc.obj : error LNK2001: unresolved external symbol "class JCCEnv * env" (?env@@3PAVJCCEnv@@A)>
1>stdafx.obj : error LNK2001: unresolved external symbol "class JCCEnv * env" (?env@@3PAVJCCEnv@@A)>
1>__wrap__.obj : error LNK2001: unresolved external symbol "class JCCEnv * env" (?env@@3PAVJCCEnv@@A)>
1>C:\out\app\PeldaProgram\ZipBe\bin\test\src\Debug\jcc.exe : fatal error LNK1120: 2 unresolved
externals>
1>Done Building Project "C:\out\app\PeldaProgram\ZipBe\bin\test\jcc\jcc.vcxproj" (rebuild
target(s)) -- FAILED.>
>
Build FAILED.>
>
Time Elapsed 00:00:12.60>
------------------------------------------------------------------>
>
>
jni.h and Native2Java.h (jcc generated from the java class I intend to use in native c++ code)
is added to stdafx.h. Now I have no idea where the above symbols come from, and how should
I resolve them.>
>
>
Regards,>
András>
>


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