scripts/gcc-x86_64-has-stack-protector.sh - linux - Git at Google

 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0

 echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -m64 -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
	#!/bin/sh
	# SPDX-License-Identifier: GPL-2.0

	echo "int foo(void) { char X[200]; return 3; }" \| $* -S -x c -m64 -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null \| grep -q "%gs"