[clang] Document -fstrict-flex-arrays option (#138388)
Fix #138185
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 2946ffa..1167762 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -1554,7 +1554,11 @@
Visibility<[ClangOption, CC1Option]>,
NormalizedValuesScope<"LangOptions::StrictFlexArraysLevelKind">,
NormalizedValues<["Default", "OneZeroOrIncomplete", "ZeroOrIncomplete", "IncompleteOnly"]>,
- HelpText<"Enable optimizations based on the strict definition of flexible arrays">,
+ HelpText<"Enable optimizations based on the strict definition of flexible arrays.">,
+ DocBrief<[{If ``<n>`` is equal to 0, any trailing array member is considered a flexible array.
+ If ``<n>`` is equal to 1, trailing array members of size 0, 1 or undefined are considered flexible arrays.
+ If ``<n>`` is equal to 2, trailing array members of size 0 or undefined are considered flexible arrays.
+ If ``<n>`` is equal to 3, only trailing array members of undefined size are considered flexible arrays.}]>,
MarshallingInfoEnum<LangOpts<"StrictFlexArraysLevel">, "Default">;
defm apple_pragma_pack : BoolFOption<"apple-pragma-pack",
LangOpts<"ApplePragmaPack">, DefaultFalse,
