[CMake] Windows path too long

[Robert Bielik]

I have a problem with a VS 2015 project, where the build state path becomes too long:

Severity	Code	Description	Project	File	Line	Suppression State
Error	MSB3491	Could not write lines to file "processor_withAVeryVeryLongName.dir\Release\processo.92BD73FC.tlog\processor_withAVeryVeryLongName.lastbuildstate". The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.	processor_withAVeryVeryLongName	C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.CppBuild.targets	312

The line in Microsoft.CppBuild.targets is:

<WriteLinesToFile Overwrite="true" File="$(LastBuildState)" Lines="$(ProjectStateLine);$(ProjectEvaluationFingerprint)"/>

I've set CMAKE_OBJECT_PATH_MAX to 240, but I don't think it will affect this...

Ideas ?

This is with CMake 3.5.2.

Regards
/Robert