B00.EnvBuild environment.
Build environments specify the environment of tool spawns.
TODO Now that tool lookup moved to Memo, is it still worth sense to have that separate ?
val v : ?forced_env:B00_std.Os.Env.t -> B00_std.Os.Env.t -> tv ~lookup ~forced_env env is a build environment with:
forced_env is environment forced on any tool despite what it declared to access, defaults to Os.Env.emptyenv the environment read by the tools' declared environment variables.val env : t -> B00_std.Os.Env.tenv e is e's available spawn environment.
val forced_env : t -> B00_std.Os.Env.tforced_env e is e's forced spawn environment.