Apply enneract's linux fixes.

[dGr8LookinSparky]

No description provided.

[zturtleman]

Recommend against adding this to make clean:

	@rm -rf $(B)
	@rm -rf $(BUILD_DIR)

(Which causes it to also delete compiled tools, builds for other platforms, and whatever loose files one may have added.)

One can use the existing make distclean instead (runs @rm -rf $(BUILD_DIR)).

[wtfbbqhax]

@dGr8LookinSparky See @zturtleman 's request