3 commits

Author	SHA1	Message	Date
John Ericson	8cd4c31d6b	top-level: Allow nixpkgs to take localSystem directly ... This is instead of both system and platform, which is kind of ugly.	2017-02-08 22:06:57 -05:00
John Ericson	5eaea6cee0	cross stdenv: let build package's build deps resolve to native packages ... This fixes the "sliding window" principle: 0. Run packages: build = native; host = foreign; target = foreign; 1. Build packages: build = native; host = native; target = foreign; 2. Vanilla packages: build = native; host = native; target = native; 3. Vanilla packages: build = native; host = native; target = native; n+3. ... Each stage's build dependencies are resolved against the previous stage, and the "foreigns" are shifted accordingly. Vanilla packages alone are built against themsevles, since there are no more "foreign"s to shift away. Before, build packages' build dependencies were resolved against themselves: 0. Run packages: build = native; host = foreign; target = foreign; 1. Build packages: build = native; host = native; target = foreign; 2. Build packages: build = native; host = native; target = foreign; n+2. ... This is wrong because that principle is violated by the target platform staying foreign. This will change the hashes of many build packages and run packages, but that is OK. This is an unavoidable cost of fixing cross compiling. The cross compilation docs have been updated to reflect this fix.	2017-02-05 12:01:53 -05:00
John Ericson	39fb46f538	nixpkgs docs: Cross compilation docs	2017-01-24 11:37:56 -05:00