[CMake] Merge "VS: Use full path to sources to allow deeper trees with VS >= 10" fix to release

[Andreas.Metz at hydrometer.de]

Hi CMakers,

I was running into a  "using to long path" issue with CMake.

Here some short notes about my setup:

OS: Windows 7
Dev: MS Visual Studio 10
CMake: 2.8.12 (tested it also with 3.0.1)

In our project (it is based on the CIAO/TAO framework) some files will be 
generated automatically through an IDL compiler. Through that process the 
root of the project will be based on those generated files.
Additional source files, placed in a complete other folder, will be 
referenced through relative paths to the project folder.

The project itself consists of several subfolders and the length of the 
paths can go up to 100 letters (which should still be ok for CMake and 
Visual Studio) but through adding some file into another folder, the 
relative path description can grow up to more then 250 letters:
(e.g. c:\path\to\current\dir\..\..\..\relative\path\to\source.c)
 
As the project is already quite big, and the concept on how we store our 
files is not a thing we can change quite easily, I was looking if it is 
possible that CMake will generate always absolute paths.
By default, CMake was not able to generate absolute paths, also the 
CMAKE_USE_RELATIVE_PATHES flag had no effect on my project.

After some investigations I found out, that a solution was already 
submitted by the CMake dev team through the following change:

http://cmake.org/gitweb?p=cmake.git;a=commit;h=0d048384694b7285ef739153757b57791d4ebb93

But it seems, that it did not make it into the release branches.
My question is now, is there any reason why that fix, besides serval other 
changes to the "cmVisualStudio10TargetGenerator.cxx" did not made it into 
a new CMake release?

After I found out, that a solution is already available I downloaded the 
nightly build binaries form the 1st of september and voila it worked.
In addition CMake will print out a warning, that informs me that we have a 
path that is too long.

Thats why I wanna ask you guys here, how I should proceed. Should I add a 
bug although a solution already exists?

Kind regards,
Andreas


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