diff options
Diffstat (limited to 'src/corelib/global/qcompilerdetection.h')
| -rw-r--r-- | src/corelib/global/qcompilerdetection.h | 98 |
1 files changed, 49 insertions, 49 deletions
diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h index ad3d2be69b..99a30e941b 100644 --- a/src/corelib/global/qcompilerdetection.h +++ b/src/corelib/global/qcompilerdetection.h @@ -358,7 +358,6 @@ # define Q_COMPILER_ATTRIBUTES # define Q_COMPILER_AUTO_FUNCTION # define Q_COMPILER_CLASS_ENUM -# define Q_COMPILER_CONSTEXPR # define Q_COMPILER_DECLTYPE # define Q_COMPILER_DEFAULT_MEMBERS # define Q_COMPILER_DELETE_MEMBERS @@ -494,6 +493,39 @@ #endif /* + * SG10's SD-6 feature detection and some useful extensions from Clang and GCC + * https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations + * http://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros + * Not using wrapper macros, per http://eel.is/c++draft/cpp.cond#7.sentence-2 + */ +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif +#ifndef __has_feature +# define __has_feature(x) 0 +#endif +#ifndef __has_attribute +# define __has_attribute(x) 0 +#endif +#ifndef __has_cpp_attribute +# define __has_cpp_attribute(x) 0 +#endif +#ifndef __has_include +# define __has_include(x) 0 +#endif +#ifndef __has_include_next +# define __has_include_next(x) 0 +#endif + +// Kept around until all submodules have transitioned +#define QT_HAS_BUILTIN(x) __has_builtin(x) +#define QT_HAS_FEATURE(x) __has_feature(x) +#define QT_HAS_ATTRIBUTE(x) __has_attribute(x) +#define QT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#define QT_HAS_INCLUDE(x) __has_include(x) +#define QT_HAS_INCLUDE_NEXT(x) __has_include_next(x) + +/* * C++11 support * * Paper Macro SD-6 macro @@ -783,13 +815,14 @@ # endif # endif -# if defined(__has_warning) -# if __has_warning("-Wunused-private-field") -# define Q_DECL_UNUSED_MEMBER Q_DECL_UNUSED -# endif -# endif +#endif // Q_CC_CLANG && !Q_CC_INTEL && !Q_CC_MSVC -#endif // Q_CC_CLANG +#if defined(Q_CC_CLANG) && !defined(Q_CC_INTEL) +# ifndef Q_DECL_UNUSED +# define Q_DECL_UNUSED __attribute__((__unused__)) +# endif +# define Q_DECL_UNUSED_MEMBER Q_DECL_UNUSED +#endif #if defined(Q_CC_GNU) && !defined(Q_CC_INTEL) && !defined(Q_CC_CLANG) # define Q_COMPILER_RESTRICTED_VLA @@ -837,7 +870,6 @@ # define Q_COMPILER_DEFAULT_MEMBERS # define Q_COMPILER_DELETE_MEMBERS /* C++11 features supported in GCC 4.6: */ -# define Q_COMPILER_CONSTEXPR # define Q_COMPILER_NULLPTR # define Q_COMPILER_UNRESTRICTED_UNIONS # define Q_COMPILER_RANGE_FOR @@ -868,7 +900,11 @@ # define Q_COMPILER_REF_QUALIFIERS # endif # endif - /* C++11 features are complete as of GCC 4.8.1 */ +# if Q_CC_GNU >= 500 + /* GCC 4.6 introduces constexpr, but it's bugged (at least) in the whole + * 4.x series, see e.g. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57694 */ +# define Q_COMPILER_CONSTEXPR +# endif # endif # if __cplusplus > 201103L # if Q_CC_GNU >= 409 @@ -1020,37 +1056,6 @@ #endif /* - * SG10's SD-6 feature detection and some useful extensions from Clang and GCC - * https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations - * http://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros - */ -#ifdef __has_builtin -# define QT_HAS_BUILTIN(x) __has_builtin(x) -#else -# define QT_HAS_BUILTIN(x) 0 -#endif -#ifdef __has_attribute -# define QT_HAS_ATTRIBUTE(x) __has_attribute(x) -#else -# define QT_HAS_ATTRIBUTE(x) 0 -#endif -#ifdef __has_cpp_attribute -# define QT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) -#else -# define QT_HAS_CPP_ATTRIBUTE(x) 0 -#endif -#ifdef __has_include -# define QT_HAS_INCLUDE(x) __has_include(x) -#else -# define QT_HAS_INCLUDE(x) 0 -#endif -#ifdef __has_include_next -# define QT_HAS_INCLUDE_NEXT(x) __has_include_next(x) -#else -# define QT_HAS_INCLUDE_NEXT(x) 0 -#endif - -/* * C++11 keywords and expressions */ #ifdef Q_COMPILER_NULLPTR @@ -1124,7 +1129,7 @@ # define Q_DECL_ALIGN(n) alignas(n) #endif -#if QT_HAS_CPP_ATTRIBUTE(nodiscard) && !defined(Q_CC_CLANG) // P0188R1 +#if __has_cpp_attribute(nodiscard) && !defined(Q_CC_CLANG) // P0188R1 // Can't use [[nodiscard]] with Clang, see https://bugs.llvm.org/show_bug.cgi?id=33518 # undef Q_REQUIRED_RESULT # define Q_REQUIRED_RESULT [[nodiscard]] @@ -1226,11 +1231,6 @@ #ifndef QT_MAKE_CHECKED_ARRAY_ITERATOR # define QT_MAKE_CHECKED_ARRAY_ITERATOR(x, N) (x) #endif -#ifdef __has_feature -# define QT_HAS_FEATURE(x) __has_feature(x) -#else -# define QT_HAS_FEATURE(x) 0 -#endif /* * Warning/diagnostic handling @@ -1321,11 +1321,11 @@ } while (false) #if defined(__cplusplus) -#if QT_HAS_CPP_ATTRIBUTE(clang::fallthrough) +#if __has_cpp_attribute(clang::fallthrough) # define Q_FALLTHROUGH() [[clang::fallthrough]] -#elif QT_HAS_CPP_ATTRIBUTE(gnu::fallthrough) +#elif __has_cpp_attribute(gnu::fallthrough) # define Q_FALLTHROUGH() [[gnu::fallthrough]] -#elif QT_HAS_CPP_ATTRIBUTE(fallthrough) +#elif __has_cpp_attribute(fallthrough) # define Q_FALLTHROUGH() [[fallthrough]] #endif #endif |