diff options
Diffstat (limited to 'Source/WTF/wtf/Compiler.h')
| -rw-r--r-- | Source/WTF/wtf/Compiler.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Source/WTF/wtf/Compiler.h b/Source/WTF/wtf/Compiler.h index 9637dc0bc..f40e15e60 100644 --- a/Source/WTF/wtf/Compiler.h +++ b/Source/WTF/wtf/Compiler.h @@ -48,9 +48,14 @@ #define CLANG_PRAGMA(PRAGMA) _Pragma(PRAGMA) /* Specific compiler features */ -#define WTF_COMPILER_SUPPORTS_CXX_VARIADIC_TEMPLATES __has_feature(cxx_variadic_templates) -#define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES __has_feature(cxx_rvalue_references) -#define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS __has_feature(cxx_deleted_functions) +#define WTF_COMPILER_SUPPORTS_CXX_VARIADIC_TEMPLATES __has_extension(cxx_variadic_templates) + +/* There is a bug in clang that comes with Xcode 4.2 where AtomicStrings can't be implicitly converted to Strings + in the presence of move constructors and/or move assignment operators. This bug has been fixed in Xcode 4.3 clang, so we + check for both cxx_rvalue_references as well as the unrelated cxx_nonstatic_member_init feature which we know was added in 4.3 */ +#define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES __has_extension(cxx_rvalue_references) && __has_extension(cxx_nonstatic_member_init) + +#define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS __has_extension(cxx_deleted_functions) #define WTF_COMPILER_SUPPORTS_CXX_NULLPTR __has_feature(cxx_nullptr) #define WTF_COMPILER_SUPPORTS_BLOCKS __has_feature(blocks) #define WTF_COMPILER_SUPPORTS_C_STATIC_ASSERT __has_extension(c_static_assert) |