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yacc.c: beware of GCC's -Wmaybe-uninitialized

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Test 400 (calc.at:773: testing Calculator api.push-pull=both
api.pure=full parse.error=verbose %debug %locations %defines
api.prefix={calc} %verbose %yacc) fails on the CI with GCC 8 on
Bionic:

    400. calc.at:773: testing Calculator api.push-pull=both api.pure=full parse.error=verbose %debug %locations %defines api.prefix={calc} %verbose %yacc  ...
    ../../tests/calc.at:773: bison --color=no -fno-caret -Wno-deprecated -o calc.c calc.y
    ../../tests/calc.at:773: $CC $CFLAGS $CPPFLAGS  $LDFLAGS -o calc calc.c calc-lex.c calc-main.c $LIBS
    stderr:
    calc.y: In function 'int calcpush_parse(calcpstate*, int, const CALCSTYPE*, CALCLTYPE*)':
    calc.y:26:20: error: 'yylval.CALCSTYPE::ival' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     %printer { fprintf (yyo, "%d", $$); } <ival>;
                        ^
    calc.c:1272:9: note: 'yylval.CALCSTYPE::ival' was declared here
     YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);
             ^~~~~~
    cc1plus: all warnings being treated as errors
    stdout:
    ../../tests/calc.at:773: exit code was 1, expected 0
    400. calc.at:773: 400. Calculator api.push-pull=both api.pure=full parse.error=verbose %debug %locations %defines api.prefix={calc} %verbose %yacc  (calc.at:773): FAILED (calc.at:773)

* data/skeletons/c.m4 (yy_symbol_value_print): Disable the warning
locally.
This commit is contained in:
Akim Demaille
2019-09-06 07:21:59 +02:00
parent 61c2c40092
commit 989503b1ba
1 changed files with 2 additions and 0 deletions
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2
data/skeletons/c.m4
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@@ -545,7 +545,9 @@ m4_if(b4_skeleton, ["yacc.c"],
# endif
]])dnl
b4_percent_code_get([[pre-printer]])dnl
YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
b4_symbol_actions([printer])
YY_IGNORE_MAYBE_UNINITIALIZED_END
b4_percent_code_get([[post-printer]])dnl
[}