Exiv2

Thanks very much to Peter E from The American Museum of Natural History, New York for reporting the following issue:

----------------------------------------------------------------
    | I followed your build instructions and everything went smoothly. |
    | The problem is when I try to link to the resulting exiv2 lib,    |
    | the linker will fail with a message saying that it cannot find   |
    |                                                                  |
    | ..\..\..\zlib-1.2.3\projects\visualc6\blah\blah                  |
    ----------------------------------------------------------------

Workaround
----------

1) #define HAVE_LIBZ 1 in src/exv_msvc.h
2) delete the directory msvc/include (this will be recopied when you build exiv2lib)
3) rebuild all

Discussion
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When you enable zlib support using HAVE_LIBZ, you will include the #pragma comment(lib,".....") statements into your build.
This is fine for building the exiv2 family of libraries and executables, because it implies that you can build with/without zlib without having to change the project files. Very convenient for me. Very inconvenient for Peter.

The solution (for 0.18.1)
-------------------

1) exv_msvc.h now lives in exiv2\msvc\include
and is not copied during the build process.
So, there's only one copy of exv_msvc.h which you can edit!

2) exv_msvc.h no longer includes #pragma comment statements

3) all progam project files (exiv2.vcproj etc) have been updated to explitly link the appropriate zlib library

The correct linkage is:
DebugDLL: ..\..\..\zlib-1.2.3\projects\visualc6\Win32_DLL_Debug\zlib1d.lib
ReleaseDLL: ..\..\..\zlib-1.2.3\projects\visualc6\Win32_DLL_Release\zlib1.lib
Debug: ..\..\..\zlib-1.2.3\projects\visualc6\Win32_LIB_Debug\zlibd.lib
Release: ..\..\..\zlib-1.2.3\projects\visualc6\Win32_LIB_Release\zlib.lib