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Bug 711683 - Use Clang's feature-detection macros, not its version number, for feature testing. r=cjones

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--HG--
extra : rebase_source : fdf8e0bff705410a85bd4560f08b226321632bb1
This commit is contained in:
Jeff Walden 2011-12-17 16:45:29 -05:00
parent bcd5afef4c
commit f108ab9e90
1 changed files with 11 additions and 5 deletions
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16
mfbt/Attributes.h
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@ -61,14 +61,20 @@
* for forward compatibility.
*/
#if defined(__clang__)
# if __clang_major__ >= 3
/*
* Per Clang documentation, "Note that marketing version numbers should not
* be used to check for language features, as different vendors use different
* numbering schemes. Instead, use the feature checking macros."
*/
# ifndef __has_extension
# define __has_extension __has_feature /* compatibility, for older versions of clang */
# endif
# if __has_extension(cxx_deleted_functions)
# define MOZ_HAVE_CXX11_DELETE
# endif
# if __has_extension(cxx_override_control)
# define MOZ_HAVE_CXX11_OVERRIDE
# define MOZ_HAVE_CXX11_FINAL final
# elif __clang_major__ == 2
# if __clang_minor__ >= 9
# define MOZ_HAVE_CXX11_DELETE
# endif
# endif
#elif defined(__GNUC__)
# if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L