diff options
| author | Paul Eggert <eggert@cs.ucla.edu> | 2019-10-17 11:28:38 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2019-10-17 11:51:20 -0700 |
| commit | 83c9051a64e70b07904a0f6abe7988f75e59884e (patch) | |
| tree | f1e940f1104fbf71e7e9a79675dea16ec00b3fb2 /data | |
| parent | 7a557ee7fe7d18400a161c696a8ad32d374caf5e (diff) | |
| download | bison-83c9051a64e70b07904a0f6abe7988f75e59884e.tar.gz | |
c: port YY_ATTRIBUTE_UNUSED to Sun C 5.12
Sun C 5.12 defines __SUNPRO_C to 0x5120 but diagnoses
‘__attribute__ ((__unused__))’. Change the ifdefs to use
the same method as Gnulib in this area.
* data/skeletons/c.m4 (YY_ATTRIBUTE): Remove, since
not all attributes were added in the same compiler version.
(YY_ATTRIBUTE_PURE, YY_ATTRIBUTE_UNUSED):
Use specific GCC version for each attribute.
Pay no attention to __SUNPRO_C.
* tests/headers.at (Several parsers): Tighten tests accordingly.
Diffstat (limited to 'data')
| -rw-r--r-- | data/skeletons/c.m4 | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/data/skeletons/c.m4 b/data/skeletons/c.m4 index 4580fd75..a1d55d47 100644 --- a/data/skeletons/c.m4 +++ b/data/skeletons/c.m4 @@ -282,22 +282,20 @@ m4_define([b4_table_value_equals], # Provide portable compiler "attributes". If "noreturn" is passed, define # _Noreturn. m4_define([b4_attribute_define], -[[#ifndef YY_ATTRIBUTE -# if (defined __GNUC__ \ - && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__))) \ - || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C -# define YY_ATTRIBUTE(Spec) __attribute__(Spec) +[[#ifndef YY_ATTRIBUTE_PURE +# if defined __GNUC__ && 2 < __GNUC__ + (96 <= __GNUC_MINOR__) +# define YY_ATTRIBUTE_PURE __attribute__ ((__pure__)) # else -# define YY_ATTRIBUTE(Spec) /* empty */ +# define YY_ATTRIBUTE_PURE # endif #endif -#ifndef YY_ATTRIBUTE_PURE -# define YY_ATTRIBUTE_PURE YY_ATTRIBUTE ((__pure__)) -#endif - #ifndef YY_ATTRIBUTE_UNUSED -# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__)) +# if defined __GNUC__ && 2 < __GNUC__ + (7 <= __GNUC_MINOR__) +# define YY_ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +# else +# define YY_ATTRIBUTE_UNUSED +# endif #endif ]m4_bmatch([$1], [\bnoreturn\b], [[/* The _Noreturn keyword of C11. */ |