Similar to #118, there is the output from the rustc --print cfg command that could be passed to the WiX compiler (candle.exe) as WiX variables. See #126 for an example output and an initial discussion on which output would be useful as WiX variables. Relevant comments reposted here:

roblabla@roblabla-work:~/vm-image$ rustc --print cfg --target i686-pc-windows-msvc
debug_assertions
target_arch="x86"
target_endian="little"
target_env="msvc"
target_family="windows"
target_feature="fxsr"
target_feature="sse"
target_feature="sse2"
target_os="windows"
target_pointer_width="32"
target_vendor="pc"
windows

We should add some of these as WiX Variables, too:

• target_env = TargetEnv
• target_vendor = TargetVendor

I am not sure the rest are needed or useful.