3 commits

Author	SHA1	Message	Date
Emily	a783e4645d	Refactor build script toolchain lookups. ... Now environment variable overrides no longer infect the build scripts. _toolchain.overrides is dropped as probably misguided in the first place. Fixes #251.	2019-10-13 13:53:24 +00:00
Emily	c4e8ac734f	_toolchain,build.plat,vendor.*: add required_tools list and checks.	2019-08-31 00:05:47 +00:00
whitequark	b14f5572d8	_toolchain: new module, for injecting dependencies in e.g. Nix.	2019-08-28 11:32:18 +00:00