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c: port YY_ATTRIBUTE_UNUSED to Sun C 5.12

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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.
This commit is contained in:
Paul Eggert
2019-10-17 11:28:38 -07:00
parent 7a557ee7fe
commit 83c9051a64
2 changed files with 10 additions and 12 deletions
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2
tests/headers.at
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@@ -321,7 +321,7 @@ AT_PERL_CHECK([[-n -0777 -e '
|YYChar
|YYPUSH_MORE(?:_DEFINED)?
|YYUSE
|YY_ATTRIBUTE(?:_PURE|_UNUSED)?
|YY_ATTRIBUTE(?:_PURE|_UNUSED)
|YY_CONSTEXPR
|YY_COPY
|YY_CPLUSPLUS