@echo 'Environment variables:'
@echo ' O=<abspath> - Use <abspath> as object directory'
@echo ' V="" - Quiet build (default)'
- @echo ' V=1 - Verbose build'
+ @echo ' V=1 - Brief build (show defines, ld flags)'
@echo ' V=2 - Very verbose build'
@echo ' CROSS= - Override CROSS_COMPILER_PREFIX from .config'
@echo ' ARCH= - Use given arch for config targets'