100 lines
4.6 KiB
C
100 lines
4.6 KiB
C
#pragma once
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// Verify that the GCC is correctly defining __cplusplus. This is not the case for
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// GCC versions < 4.7, where it is just defined to 1. We only error here in case of linux build
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// as we, as we use the commandline --std=xxx to select the featureset there. On armcc and cxppc
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// we do not use any >C99 features, so the detection works correctly with __cplusplus==1
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#if (__cplusplus == 1) && defined(LINUX)
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#error "This version of GCC is not supported. Please update to a more recent one."
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#endif
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#if defined(__cplusplus) && __cplusplus < 201103L
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#error "Baselib requires C++11 support"
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#endif
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#define COMPILER_GCC 1
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// __cpp_exceptions is the correct way to check whether exceptions are enabled or not, but is unfortunately not supported
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// by GCC versions before 5.0. For Pre 5.0 GCC, we also need to check the __EXCEPTIONS macro
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#if defined(__cpp_exceptions) || __EXCEPTIONS == 1
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#define COMPILER_SUPPORTS_EXCEPTIONS 1
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#else
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#define COMPILER_SUPPORTS_EXCEPTIONS 0
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#endif
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// __cpp_rtti is the correct way to check whether RTTI is enabled or not, but is unfortunately not supported
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// by GCC versions before 5.0. For Pre 5.0 GCC, we also need to check the __GXX_RTTI macro
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#if defined(__cpp_rtti) || __GXX_RTTI == 1
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#define COMPILER_SUPPORTS_RTTI 1
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#else
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#define COMPILER_SUPPORTS_RTTI 0
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#endif
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// GCC >=4.9
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#if defined(__cpp_generic_lambdas) && (__cpp_generic_lambdas >= 201304)
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#define COMPILER_SUPPORTS_GENERIC_LAMBDA_EXPRESSIONS 1
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#else
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#define COMPILER_SUPPORTS_GENERIC_LAMBDA_EXPRESSIONS 0
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#endif
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#define COMPILER_BUILTIN_EXPECT(X_, Y_) __builtin_expect((X_), (Y_))
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// Tells the compiler to assume that this statement is never reached.
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// (reaching it anyways is undefined behavior!)
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#define COMPILER_BUILTIN_UNREACHABLE() __builtin_unreachable()
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// Tells the compiler to assume that the given expression is true until the expression is modified.
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// (it is undefined behavior if the expression is not true after all)
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#define COMPILER_BUILTIN_ASSUME(EXPR_) do { if (!(EXPR_)) COMPILER_BUILTIN_UNREACHABLE(); } while(false)
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#define COMPILER_NOINLINE __attribute__((unused, noinline)) // unused is needed to avoid warning when a function is not used
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#define COMPILER_INLINE __attribute__((unused)) inline
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#define COMPILER_FORCEINLINE __attribute__((unused, always_inline)) inline
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#define COMPILER_EMPTYINLINE __attribute__((const, always_inline)) inline
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#define COMPILER_NORETURN __attribute__((noreturn))
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#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || __GNUC__ > 4
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#define COMPILER_DEPRECATED(msg) __attribute__((deprecated(msg)))
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#else
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#define COMPILER_DEPRECATED(msg) __attribute__((deprecated))
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#endif
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// Support for attributes on enumerators is GCC 6
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#if __GNUC__ >= 6
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#define COMPILER_DEPRECATED_ENUM_VALUE(msg) __attribute__((deprecated(msg)))
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#else
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#define COMPILER_DEPRECATED_ENUM_VALUE(msg)
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#endif
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#define COMPILER_ALIGN_OF(TYPE_) __alignof__(TYPE_)
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#define COMPILER_ALIGN_AS(ALIGN_) __attribute__((aligned(ALIGN_)))
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#define COMPILER_C_STATIC_ASSERT(EXPR_, MSG_) _Static_assert(EXPR_, MSG_)
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#define COMPILER_ATTRIBUTE_UNUSED __attribute__((unused))
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// Some versions of GCC do provide __builtin_debugtrap, but it seems to be unreliable.
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// See https://github.com/scottt/debugbreak/issues/13
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#if defined(__i386__) || defined(__x86_64__)
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#define COMPILER_DEBUG_TRAP() __asm__ volatile("int $0x03")
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#elif defined(__thumb__)
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#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xde01")
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#elif defined(__arm__) && !defined(__thumb__)
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#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xe7f001f0")
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#elif defined(__aarch64__)
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#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xd4200000")
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#endif
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#define COMPILER_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#define HAS_CLANG_FEATURE(x) 0
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// Warning management
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#define COMPILER_PRINT_MESSAGE(MESSAGE_) _Pragma(PP_STRINGIZE(message(__FILE__ "info: " MESSAGE_)))
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#define COMPILER_PRINT_WARNING(MESSAGE_) _Pragma(PP_STRINGIZE(message(__FILE__ "warning: " MESSAGE_)))
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#define COMPILER_WARNING_UNUSED_VARIABLE PP_STRINGIZE(-Wunused-variable)
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#define COMPILER_WARNING_DEPRECATED PP_STRINGIZE(-Wdeprecated)
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#define COMPILER_WARNINGS_PUSH _Pragma("GCC diagnostic push")
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#define COMPILER_WARNINGS_POP _Pragma("GCC diagnostic pop")
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#define COMPILER_WARNINGS_DISABLE(Warn) _Pragma(PP_STRINGIZE(GCC diagnostic ignored Warn))
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