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yacc: beware of GCC9 warnings in push mode
From: |
Akim Demaille |
Subject: |
yacc: beware of GCC9 warnings in push mode |
Date: |
Sun, 20 Oct 2019 14:04:26 +0200 |
commit c30c6b651973da07f3b28f23c3e4ff5f69f32082
Author: Akim Demaille <address@hidden>
Date: Sun Oct 20 13:55:36 2019 +0200
yacc: beware of GCC9 warnings in push mode
260. headers.at:184: testing Sane headers: api.pure api.push-pull=both
...
tests/headers.at:184: COLUMNS=1000; export COLUMNS; bison --color=no
-fno-caret -d -o input.c input.y
tests/headers.at:184: $CC $CFLAGS $CPPFLAGS -c -o input.o input.c
stderr:
input.c: In function 'yyparse':
input.c:1276:16: error: 'yylval' may be used uninitialized in this
function [-Werror=maybe-uninitialized]
1276 | yylval = *yypushed_val;
| ~~~~~~~^~~~~~~~~~~~~~~
input.c: In function 'yypull_parse':
input.c:1276:16: error: 'yylval' may be used uninitialized in this
function [-Werror=maybe-uninitialized]
1276 | yylval = *yypushed_val;
| ~~~~~~~^~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
stdout:
tests/headers.at:184: exit code was 1, expected 0
* data/skeletons/yacc.c (yybackup:): Silence this warning.
diff --git a/data/skeletons/yacc.c b/data/skeletons/yacc.c
index 18e40fc2..5bcd8fb0 100644
--- a/data/skeletons/yacc.c
+++ b/data/skeletons/yacc.c
@@ -1586,7 +1586,9 @@ yybackup:
yypush_parse invocation since subsequent invocations don't overwrite
it before jumping to yyread_pushed_token. */
yychar = yypushed_char;
- yylval = yypushed_val;]b4_locations_if([[
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+ yylval = yypushed_val;
+ YY_IGNORE_MAYBE_UNINITIALIZED_END]b4_locations_if([[
yylloc = yypushed_loc;]])])[
yyread_pushed_token:]])[
YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
- yacc: beware of GCC9 warnings in push mode,
Akim Demaille <=