1# SPDX-License-Identifier: GPL-2.0 2ifdef CONFIG_KCSAN 3 4# GCC and Clang accept backend options differently. Do not wrap in cc-option, 5# because Clang accepts "--param" even if it is unused. 6ifdef CONFIG_CC_IS_CLANG 7cc-param = -mllvm -$(1) 8else 9cc-param = --param -$(1) 10endif 11 12# Keep most options here optional, to allow enabling more compilers if absence 13# of some options does not break KCSAN nor causes false positive reports. 14CFLAGS_KCSAN := -fsanitize=thread \ 15 $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls) \ 16 $(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1)) \ 17 $(call cc-param,tsan-distinguish-volatile=1) 18 19endif # CONFIG_KCSAN 20