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Does the linker read the library but cannot find the symbol in it? Unresolved External Symbol, but only for Win32, not for x64

Background

I have an astronomical C library that I want to use in my C ++ application.

I built it in Visual Studio 2012 Express in Win32 and x64 configurations and:

  • dynamic debugging (.dll)
  • dynamic version (.dll)
  • static debugging (.lib)
  • static release (.lib)

... so these are 2 * 4 = 8 complete binary files (not counting * .pdb files, etc.)

Then I use Batch Build to create all the configurations, because sometimes I need different versions, and I think that all this is done at the beginning and with the process better than randomly when things are easy to mix.

++ . , Linker → Input :

SwissEphemeris_$(Platform)_$(Configuration).lib

... . . .

:

8 , , , :

  • Win32
  • Win32

:

main.obj : error LNK2019: unresolved external symbol _swe_close referenced in function _main

, :

  • /, Win32 x64, /MACHINE
  • / main(), swe_close() Win32 *.lib.

, . , , , , SwissEphemeris_Win32_DynamicDebug.lib, swe_close(). dumpbin.exe , , , , .

1>  Unused libraries:
1>    E:\Data\Code\lib\SwissEphemeris\SwissEphemeris_Win32_DynamicDebug.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\user32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\gdi32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\winspool.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\comdlg32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\advapi32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\shell32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\ole32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\oleaut32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\uuid.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\odbc32.lib
1>    C:\Program Files (x86)\Windows Kits\8.0\lib\win8\um\x86\odbccp32.lib
1>    E:\Programs\VS2012\VC\lib\OLDNAMES.lib
1>  
1>main.obj : error LNK2019: unresolved external symbol _swe_close referenced in function _main
1>E:\Data\Code\test\Debug\test.exe : fatal error LNK1120: 1 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

- , debug/release Win32, 6 ?

, Win32/X86, :

( - - "bin", , ).

/OUT:"E:\Data\Code\libBuilders\SwissEphemeris\bin\SwissEphemeris_Win32_DynamicDebug.dll" 
/MANIFEST 
/NXCOMPAT 
/PDB:"E:\Data\Code\libBuilders\SwissEphemeris\bin\SwissEphemeris_Win32_DynamicDebug.pdb" 
/DYNAMICBASE 
/IMPLIB:"E:\Data\Code\libBuilders\SwissEphemeris\bin\SwissEphemeris_Win32_DynamicDebug.lib" 
/DEBUG 
/DLL 
/MACHINE:X86 
/SAFESEH 
/PGD:"E:\Data\Code\libBuilders\SwissEphemeris\bin\SwissEphemeris_Win32_DynamicDebug.pgd" 
/SUBSYSTEM:CONSOLE 
/MANIFESTUAC:"level='asInvoker' uiAccess='false'" 
/ManifestFile:"E:\Data\Code\libBuilders\SwissEphemeris\obj\SwissEphemeris_Win32_DynamicDebug\SwissEphemeris_Win32_DynamicDebug.dll.intermediate.manifest" 
/ERRORREPORT:PROMPT 
/NOLOGO

dumpbin.exe /exports

E:\Data\Code\lib\SwissEphemeris>dumpbin /exports SwissEphemeris_Win32_DynamicDebug.dll
Microsoft (R) COFF/PE Dumper Version 11.00.50727.1
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file SwissEphemeris_Win32_DynamicDebug.dll

File Type: DLL

  Section contains the following exports for SwissEphemeris_Win32_DynamicDebug.dll

    00000000 characteristics
    528041A6 time date stamp Sun Nov 10 19:32:06 2013
        0.00 version
           1 ordinal base
         131 number of functions
         131 number of names

    ordinal hint RVA      name

          1    0 00001195 _swe_azalt@40 = @ILT+400(_swe_azalt@40)
          2    1 000011FE _swe_azalt_d@28 = @ILT+505(_swe_azalt_d@28)
          3    2 000012AD _swe_azalt_rev@24 = @ILT+680(_swe_azalt_rev@24)
          4    3 00001357 _swe_azalt_rev_d@20 = @ILT+850(_swe_azalt_rev_d@20)
          5    4 0000126C _swe_calc@24 = @ILT+615(_swe_calc@24)
          6    5 000011BD _swe_calc_d@20 = @ILT+440(_swe_calc_d@20)
          7    6 0000105F _swe_calc_ut@24 = @ILT+90(_swe_calc_ut@24)
          8    7 00001235 _swe_calc_ut_d@20 = @ILT+560(_swe_calc_ut_d@20)
          9    8 00001389 _swe_close@0 = @ILT+900(_swe_close@0)
         10    9 00001212 _swe_close_d@4 = @ILT+525(_swe_close_d@4)
         ...

DLL . MAKE_DLL PASCAL, : #define PASCAL_CONV PASCAL #else /* 32bit DLL */.

/* DLL defines */
#ifdef MAKE_DLL
  #if defined (PASCAL)
    #define PASCAL_CONV PASCAL 
  #else
    #define PASCAL_CONV
  #endif
  #ifdef MAKE_DLL16 /* 16bit DLL */
    /* We compiled the 16bit DLL for Windows 3.x using Borland C/C++ Ver:3.x
       and the -WD or -WDE compiler switch. */
    #define EXP16 __export 
    #define EXP32 
  #else /* 32bit DLL */
    /* To export symbols in the new DLL model of Win32, Microsoft 
       recommends the following approach */ 
    #define EXP16 
    #define EXP32  __declspec( dllexport )
  #endif
#else 
  #define PASCAL_CONV 
  #define EXP16 
  #define EXP32 
#endif

... swe_close() :

ext_def( void ) swe_close(void);

, :

extern __declspec(dllexport) void far PASCAL swe_close();

far PASCAL. - ? x64 , Win32 ?

+4
1
 9    8 00001389 _swe_close@0 = @ILT+900(_swe_close@0)

DLL , . DLL __stdcall, @0, __cdecl.

/Gd vs/Gz, , . .h, , # DLL. , __declspec (dllexport) __declspec (dllimport) . , , . , WINAPI Windows SDK. , .

+4

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