CompilerEnvironmentGcc.h
4.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
#pragma once
// Verify that the GCC is correctly defining __cplusplus. This is not the case for
// GCC versions < 4.7, where it is just defined to 1. We only error here in case of linux build
// as we, as we use the commandline --std=xxx to select the featureset there. On armcc and cxppc
// we do not use any >C99 features, so the detection works correctly with __cplusplus==1
#if (__cplusplus == 1) && defined(LINUX)
#error "This version of GCC is not supported. Please update to a more recent one."
#endif
#if defined(__cplusplus) && __cplusplus < 201103L
#error "Baselib requires C++11 support"
#endif
#define COMPILER_GCC 1
// __cpp_exceptions is the correct way to check whether exceptions are enabled or not, but is unfortunately not supported
// by GCC versions before 5.0. For Pre 5.0 GCC, we also need to check the __EXCEPTIONS macro
#if defined(__cpp_exceptions) || __EXCEPTIONS == 1
#define COMPILER_SUPPORTS_EXCEPTIONS 1
#else
#define COMPILER_SUPPORTS_EXCEPTIONS 0
#endif
// __cpp_rtti is the correct way to check whether RTTI is enabled or not, but is unfortunately not supported
// by GCC versions before 5.0. For Pre 5.0 GCC, we also need to check the __GXX_RTTI macro
#if defined(__cpp_rtti) || __GXX_RTTI == 1
#define COMPILER_SUPPORTS_RTTI 1
#else
#define COMPILER_SUPPORTS_RTTI 0
#endif
// GCC >=4.9
#if defined(__cpp_generic_lambdas) && (__cpp_generic_lambdas >= 201304)
#define COMPILER_SUPPORTS_GENERIC_LAMBDA_EXPRESSIONS 1
#else
#define COMPILER_SUPPORTS_GENERIC_LAMBDA_EXPRESSIONS 0
#endif
#define COMPILER_BUILTIN_EXPECT(X_, Y_) __builtin_expect((X_), (Y_))
// Tells the compiler to assume that this statement is never reached.
// (reaching it anyways is undefined behavior!)
#define COMPILER_BUILTIN_UNREACHABLE() __builtin_unreachable()
// Tells the compiler to assume that the given expression is true until the expression is modified.
// (it is undefined behavior if the expression is not true after all)
#define COMPILER_BUILTIN_ASSUME(EXPR_) PP_WRAP_CODE(if (!(EXPR_)) COMPILER_BUILTIN_UNREACHABLE())
#define COMPILER_NOINLINE __attribute__((unused, noinline)) // unused is needed to avoid warning when a function is not used
#define COMPILER_INLINE __attribute__((unused)) inline
#define COMPILER_FORCEINLINE __attribute__((unused, always_inline)) inline
#define COMPILER_EMPTYINLINE __attribute__((const, always_inline)) inline
#define COMPILER_NORETURN __attribute__((noreturn))
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || __GNUC__ > 4
#define COMPILER_DEPRECATED(msg) __attribute__((deprecated(msg)))
#else
#define COMPILER_DEPRECATED(msg) __attribute__((deprecated))
#endif
// Support for attributes on enumerators is GCC 6
#if __GNUC__ >= 6
#define COMPILER_DEPRECATED_ENUM_VALUE(msg) __attribute__((deprecated(msg)))
#else
#define COMPILER_DEPRECATED_ENUM_VALUE(msg)
#endif
#define COMPILER_ALIGN_OF(TYPE_) __alignof__(TYPE_)
#define COMPILER_ALIGN_AS(ALIGN_) __attribute__((aligned(ALIGN_)))
#define COMPILER_C_STATIC_ASSERT(EXPR_, MSG_) _Static_assert(EXPR_, MSG_)
#define COMPILER_ATTRIBUTE_UNUSED __attribute__((unused))
// Some versions of GCC do provide __builtin_debugtrap, but it seems to be unreliable.
// See https://github.com/scottt/debugbreak/issues/13
#if defined(__i386__) || defined(__x86_64__)
#define COMPILER_DEBUG_TRAP() __asm__ volatile("int $0x03")
#elif defined(__thumb__)
#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xde01")
#elif defined(__arm__) && !defined(__thumb__)
#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xe7f001f0")
#elif defined(__aarch64__)
#define COMPILER_DEBUG_TRAP() __asm__ volatile(".inst 0xd4200000")
#endif
#define COMPILER_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#define HAS_CLANG_FEATURE(x) 0
// Warning management
#define COMPILER_PRINT_MESSAGE(MESSAGE_) _Pragma(PP_STRINGIZE(message(__FILE__ "info: " MESSAGE_)))
#define COMPILER_PRINT_WARNING(MESSAGE_) _Pragma(PP_STRINGIZE(message(__FILE__ "warning: " MESSAGE_)))
#define COMPILER_WARNING_UNUSED_VARIABLE PP_STRINGIZE(-Wunused-variable)
#define COMPILER_WARNING_DEPRECATED PP_STRINGIZE(-Wdeprecated)
#define COMPILER_WARNINGS_PUSH _Pragma("GCC diagnostic push")
#define COMPILER_WARNINGS_POP _Pragma("GCC diagnostic pop")
#define COMPILER_WARNINGS_DISABLE(Warn) _Pragma(PP_STRINGIZE(GCC diagnostic ignored Warn))