Environment variables support

[xpac27]

If I do:

export CXX=clang++-3.8
bf

Then the executable used in build.ninja is still clang. Am I doing something wrong? Is there a way I could use the value of CXX in by build.fox file in order to do something like cxx = $CXX? Or could it be handled by buildfox?

[den-mentiei]

Ninja doesnt use any env variables (except NINJA_STATUS to control progress reporting), neither buildfox does.

Ninja rationale on that - ninja-files generator should support any env variables that are needed and generate corresponding ninja file.

I think we can handle it in buildfox - with syntax being close to your proposal. We should also include some sane and useful rules from the start (eg. usual CXX stuff, etc).

[jimon]

Yeah, we should do it, maybe just pass all env variables to buildfox space (before everything else) and be done with it :) Plus also related to #179 in a way.