compiler/rustc_codegen_cranelift/config.txt - third_party/rust - Git at Google

 # This file allows configuring the build system.

 # Which triple to produce a compiler toolchain for.
 #
 # Defaults to the default triple of rustc on the host system.
 #host = x86_64-unknown-linux-gnu

 # Which triple to build libraries (core/alloc/std/test/proc_macro) for.
 #
 # Defaults to `host`.
 #target = x86_64-unknown-linux-gnu

 # Disables cleaning of the sysroot dir. This will cause old compiled artifacts to be re-used when
 # the sysroot source hasn't changed. This is useful when the codegen backend hasn't been modified.
 # This option can be changed while the build system is already running for as long as sysroot
 # building hasn't started yet.
 #keep_sysroot
	# This file allows configuring the build system.

	# Which triple to produce a compiler toolchain for.
	#
	# Defaults to the default triple of rustc on the host system.
	#host = x86_64-unknown-linux-gnu

	# Which triple to build libraries (core/alloc/std/test/proc_macro) for.
	#
	# Defaults to `host`.
	#target = x86_64-unknown-linux-gnu

	# Disables cleaning of the sysroot dir. This will cause old compiled artifacts to be re-used when
	# the sysroot source hasn't changed. This is useful when the codegen backend hasn't been modified.
	# This option can be changed while the build system is already running for as long as sysroot
	# building hasn't started yet.
	#keep_sysroot