Well, my little hack worked in so far as the vil project compiles, but the vil.lib has 75 unresolved external symbols that turn up when I try to use it in a project. For example:

vil.lib(vil_png.obj) : error LNK2019: unresolved external symbol _png_destroy_read_struct referenced in function "public: __thiscall vil_png_structures::vil_png_structures(bool)" (??0vil_png_structures@@QAE@_N@Z)

which is indicating some problem with libpng. I'm rather at a loss of how to proceed. Any help would be greatly appreciated. Thank you in advance!

On Fri, Dec 3, 2010 at 3:09 PM, Michael Repucci <michael.repucci@gmail.com> wrote:
Hi Everyone, I'm new to VXL, and relatively new to CMake, so it's possible that my problem stems from a simple configuration setting of which I am unaware. I think I could hack together a solution to my problem, but I suspect that there is a better way.

First some background. I'm using Visual Studio 2010 on Windows XP 64-bit (but compiling VXL for 32-bit). I downloaded VXL 1.14 and updated to CMake 2.8.3. With the CMake GUI I accepted the default configuration, and hit configure. Upon hitting configure for the second and third times, I get a large number of Windows error boxes (starting shortly after the "Looking for MFC - found" message appears) with the following information:

Title: Windows - No Disk
Message: Exception Processing Message c0000013 Parameters 7c7df5f8 96cfc118 7c7df5f8 7c7df5f8
Buttons: Cancel, Try Again, Continue

I can eventually continue past this stage, and generate the build files, which open successfully in Visual Studio 2010.

But when I build the vil project I get hundreds of warnings, such as:

.\..\..\v3p\zlib\gzio.c(106): warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\string.h(105) : see declaration of 'strcpy'

..\..\..\v3p\tiff\tif_stream.cxx(62): warning C4244: 'return' : conversion from 'std::streamsize' to 'tsize_t', possible loss of data

..\..\..\v3p\geotiff\cpl_csv.c(139): warning C4996: 'stricmp': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _stricmp. See online help for details.
          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\string.h(246) : see declaration of 'stricmp'

c:\mrepucci\c3vision\libs\vxl\core\vil\vil_rgb.h(80): warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)

and eventually the error:

..\..\..\core\vil\vil_stream_url.cxx(234): error C2039: 'snprintf' : is not a member of 'std'

where line 234 reads:

vcl_snprintf(buffer, 4090, "GET /%s / HTTP/1.1\r\n", path.c_str());

So I tracked down the definition of vcl_snprintf to vcl/vcl_cstdio.h. Since I'm running Visual Studio 2010, I believe that VCL_VC_10 is defined, which means that vcl_snprintf doesn't get defined to _snprintf as it does for earlier versions of Visual Studio (see line 28), which means that it gets the default from vcl/generic/vcl_cstdio.h line 162 as vcl_generic_cstdio_STD :: snprintf, where vcl_generic_cstdio_STD is defined as std in vcl/iso/vcl_cstdio.h. And hence the error.

Now I'm tempted to just hack away and add VCL_VC_10 to line 28 of vcl/vcl_cstdio.h, but I can't be the only person running this type of system, so I'm guessing that there's a better solution. Any thoughts or suggestions?