buildroot/toolchain/external-toolchain/Config.in.2

#

if BR2_TOOLCHAIN_EXTERNAL
config BR2_TOOLCHAIN_EXTERNAL_PATH
	string "External toolchain path"
	default "/path/to/staging_dir/usr"
	help
	  Path to where the external toolchain is installed.

config BR2_TOOLCHAIN_EXTERNAL_PREFIX
	string "External toolchain prefix"
	default "$(ARCH)-linux"
	help
	  This the the external toolchain prefix. For example:
	    armeb-unknown-linux-gnu, mipsel-unknown-linux-gnu, etc.

endif