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meson: Use builtins for checking gnu __attributes__

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This requires less code, and will fast skip on compilers that are known
to not have these, like MSVC.

Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4740>
This commit is contained in:
Dylan Baker
2020-04-24 12:39:27 -07:00
committed by Marge Bot
parent 6ef314b4fa
commit 17dcd535c1
1 changed files with 7 additions and 31 deletions
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38
meson.build
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@@ -839,40 +839,16 @@ foreach b : ['bswap32', 'bswap64', 'clz', 'clzll', 'ctz', 'expect', 'ffs',
endforeach
# check for GCC __attribute__
foreach a : ['const', 'flatten', 'malloc', 'pure', 'unused',
'warn_unused_result', 'weak',]
if cc.compiles('int foo(void) __attribute__((@0@));'.format(a),
name : '__attribute__((@0@))'.format(a))
pre_args += '-DHAVE_FUNC_ATTRIBUTE_@0@'.format(a.to_upper())
endif
_attributes = [
'const', 'flatten', 'malloc', 'pure', 'unused', 'warn_unused_result',
'weak', 'format', 'packed', 'returns_nonnull', 'alias', 'noreturn',
]
foreach a : cc.get_supported_function_attributes(_attributes)
pre_args += '-DHAVE_FUNC_ATTRIBUTE_@0@'.format(a.to_upper())
endforeach
if cc.compiles('int foo(const char *p, ...) __attribute__((format(printf, 1, 2)));',
name : '__attribute__((format(...)))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_FORMAT'
endif
if cc.compiles('struct __attribute__((packed)) foo { int bar; };',
name : '__attribute__((packed))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_PACKED'
endif
if cc.compiles('int *foo(void) __attribute__((returns_nonnull));',
name : '__attribute__((returns_nonnull))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL'
endif
if cc.compiles('''int foo_def(void) __attribute__((visibility("default")));
int foo_hid(void) __attribute__((visibility("hidden")));
int foo_int(void) __attribute__((visibility("internal")));
int foo_pro(void) __attribute__((visibility("protected")));''',
name : '__attribute__((visibility(...)))')
if cc.has_function_attribute('visibility:hidden')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_VISIBILITY'
endif
if cc.compiles('int foo(void) { return 0; } int bar(void) __attribute__((alias("foo")));',
name : '__attribute__((alias(...)))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_ALIAS'
endif
if cc.compiles('int foo(void) __attribute__((__noreturn__));',
name : '__attribute__((__noreturn__))')
pre_args += '-DHAVE_FUNC_ATTRIBUTE_NORETURN'
endif
if cc.compiles('__uint128_t foo(void) { return 0; }',
name : '__uint128_t')
pre_args += '-DHAVE_UINT128'