[RFC PATCH 18/20] kconfig: add CC_HAS_CONDITION_COVERAGE for MC/DC support detection

[Sasha Levin]

Add a Kconfig symbol to detect compiler support for -fcondition-coverage,
which enables MC/DC (Modified Condition/Decision Coverage) instrumentation.
This flag is available since GCC 14.

Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 scripts/Kconfig.toolchain | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/Kconfig.toolchain b/scripts/Kconfig.toolchain
index 4b962831d62af..f66b6efacee6c 100644
--- a/scripts/Kconfig.toolchain
+++ b/scripts/Kconfig.toolchain
@@ -144,6 +144,9 @@ config CC_HAS_ASSUME
 config CC_HAS_NO_PROFILE_FN_ATTR
 	def_bool $(success,echo '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror)
 
+config CC_HAS_CONDITION_COVERAGE
+	def_bool $(cc-option,-fcondition-coverage)
+
 config CC_OPT_ZERO_INIT_PADDING_BITS
 	def_string "$(cc-option-str,-fzero-init-padding-bits=all)"
 
-- 
2.53.0