[Shapelib] unresolved external symbol _DBFIsAttributeNULL

[Juan Carlos Vizueta]

when I try to build dbfdump.exe I get the next error using both Microsoft 
Visual C++ 6.0 and Visual C++ 2005 Express Edition Beta 2:

(copied from MVC++ 6.0)

Deleting intermediate files and output files for project 'shapelib2 - Win32 
Debug'.
--------------------Configuration: shapelib2 - Win32 
Debug--------------------
Compiling...
dbfdump.c
c:\archivos de programa\microsoft visual 
studio\myprojects\shapelib2\dbfdump.c(162) : warning C4018: '>' : 
signed/unsigned mismatch
Linking...
dbfdump.obj : error LNK2001: unresolved external symbol _DBFIsAttributeNULL
Debug/shapelib2.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

shapelib2.exe - 2 error(s), 1 warning(s)



(copied from MVC++ 2005)

------ Build started: Project: shapelib, Configuration: Debug Win32 ------
Linking...
dbfdump.obj : error LNK2019: unresolved external symbol _DBFIsAttributeNULL 
referenced in function _main
Debug\shapelib.exe : fatal error LNK1120: 1 unresolved externals
Build log was saved at 
"file://c:\rfcsdk\shapelib\shapelib\Debug\BuildLog.htm"
shapelib - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

when I comment DBFIsAttributeNULL function call within dbfdump.c file the 
error doesn't show anymore and compilation succeeds


It seems like DBFIsAttributeNULL can't be found in file shapelib.lib when 
trying to link, why is that so?

Thanks a lot for your answer