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30 lines
895 B
30 lines
895 B
7 years ago
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## Helper methods added for checking GNU style attributes: __attribute__(...)
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A set of new helpers have been added to the C and C++ compiler objects for
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checking GNU style function attributes. These are not just simpler to use, they
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may be optimized to return fast on compilers that don't support these
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attributes. Currently this is true for MSVC.
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```meson
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cc = meson.get_compiler('c')
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if cc.has_function_attribute('aligned')
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add_project_arguments('-DHAVE_ALIGNED', language : 'c')
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endif
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```
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Would replace code like:
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```meson
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if cc.compiles('''into foo(void) __attribute__((aligned(32)))''')
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add_project_arguments('-DHAVE_ALIGNED', language : 'c')
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endif
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```
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Additionally, a multi argument version has been added:
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```meson
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foreach s : cc.get_supported_function_attributes(['hidden', 'alias'])
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add_project_arguments('-DHAVE_@0@'.format(s.to_upper()), language : 'c')
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endforeach
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```
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