solution, project and system environment constants not automatically set for me in 4.0

[wixbot]

Use of $(var.Platform) and $(var.SolutionDir) in my wix sources is generating the following compiler errors.

Undefined preprocessor variable '$(var.Platform)'.
Undefined preprocessor variable '$(var.SolutionDir)'.”

Search hits reference http://wixtoolset.org/documentation/manual/v3/votive/votive_project_references.html suggesting it’s still supported.

My expectation is that v4.0 takes care of automatically setting all the typical constants in compiler execution just like v3.9 and earlier releases did.

Cracking open wixproj and adding "$(DefineConstants);Platform=$(Platform);SolutionDir=$(Solut
ionDir); " entries is a work around.

Originally opened by robertob

[wixbot]

Area changed from compiler to msbuild