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From Andi Vajda <va...@apache.org>
Subject Re: Unresolved external symbol errors when linking example native c++ code that uses jcc
Date Thu, 21 Oct 2010 15:15:40 GMT

On Oct 21, 2010, at 4:39, Imre András <iar73@freemail.hu> wrote:

> 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:

I'm not sure this link line makes sense. To get an idea of what the  
correct link line looks like, get jcc to build a python extension and  
take a close look at the link line it generates as an example for your  
C++ only case.

Andi..


>
> ------------------------------------------------------------------
> 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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