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# SPDX-License-Identifier: GPL-2.0 # GCC and Clang accept backend options differently. Do not wrap in cc-option, # because Clang accepts "--param" even if it is unused. ifdef CONFIG_CC_IS_CLANG cc-param = -mllvm -$(1) else cc-param = --param $(1) endif # Keep most options here optional, to allow enabling more compilers if absence # of some options does not break KCSAN nor causes false positive reports. kcsan-cflags := -fsanitize=thread -fno-optimize-sibling-calls \ $(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \ $(call cc-param,tsan-distinguish-volatile=1) ifdef CONFIG_CC_IS_GCC # GCC started warning about operations unsupported by the TSan runtime. But # KCSAN != TSan, so just ignore these warnings. kcsan-cflags += -Wno-tsan endif ifndef CONFIG_KCSAN_WEAK_MEMORY kcsan-cflags += $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0)) endif export CFLAGS_KCSAN := $(kcsan-cflags)