Variable 'yynerrs' is recognized as unused variable in clang15, which is auto-generated by bison in parser file, as long as user code doesn't access it in '.y'. This is already fixed in bison 8.2. But for user who use latest clang, a simple harmless code piece would fix this building error.
FYI: bison patch link https://mail.gnu.org/archive/html/bison-patches/2022-08/msg00006.html Signed-off-by: Zongyuan Li <zongyuan...@smartx.com> --- target/hexagon/idef-parser/idef-parser.y | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target/hexagon/idef-parser/idef-parser.y b/target/hexagon/idef-parser/idef-parser.y index 8be44a0ad1..07aa105aa2 100644 --- a/target/hexagon/idef-parser/idef-parser.y +++ b/target/hexagon/idef-parser/idef-parser.y @@ -99,6 +99,9 @@ /* Input file containing the description of each hexagon instruction */ input : instructions { + if (yynerrs != 0) { + YYABORT; + } YYACCEPT; } ; -- 2.38.1
