1 //===--- OSTargets.cpp - Implement OS target feature support --------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements OS specific TargetInfo types.
10 //===----------------------------------------------------------------------===//
11
12 #include "OSTargets.h"
13 #include "clang/Basic/MacroBuilder.h"
14 #include "llvm/ADT/StringRef.h"
15
16 using namespace clang;
17 using namespace clang::targets;
18
19 namespace clang {
20 namespace targets {
21
getDarwinDefines(MacroBuilder & Builder,const LangOptions & Opts,const llvm::Triple & Triple,StringRef & PlatformName,VersionTuple & PlatformMinVersion)22 void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts,
23 const llvm::Triple &Triple, StringRef &PlatformName,
24 VersionTuple &PlatformMinVersion) {
25 Builder.defineMacro("__APPLE_CC__", "6000");
26 Builder.defineMacro("__APPLE__");
27 Builder.defineMacro("__STDC_NO_THREADS__");
28
29 // AddressSanitizer doesn't play well with source fortification, which is on
30 // by default on Darwin.
31 if (Opts.Sanitize.has(SanitizerKind::Address))
32 Builder.defineMacro("_FORTIFY_SOURCE", "0");
33
34 // Darwin defines __weak, __strong, and __unsafe_unretained even in C mode.
35 if (!Opts.ObjC) {
36 // __weak is always defined, for use in blocks and with objc pointers.
37 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
38 Builder.defineMacro("__strong", "");
39 Builder.defineMacro("__unsafe_unretained", "");
40 }
41
42 if (Opts.Static)
43 Builder.defineMacro("__STATIC__");
44 else
45 Builder.defineMacro("__DYNAMIC__");
46
47 if (Opts.POSIXThreads)
48 Builder.defineMacro("_REENTRANT");
49
50 // Get the platform type and version number from the triple.
51 unsigned Maj, Min, Rev;
52 if (Triple.isMacOSX()) {
53 Triple.getMacOSXVersion(Maj, Min, Rev);
54 PlatformName = "macos";
55 } else {
56 Triple.getOSVersion(Maj, Min, Rev);
57 PlatformName = llvm::Triple::getOSTypeName(Triple.getOS());
58 }
59
60 // If -target arch-pc-win32-macho option specified, we're
61 // generating code for Win32 ABI. No need to emit
62 // __ENVIRONMENT_XX_OS_VERSION_MIN_REQUIRED__.
63 if (PlatformName == "win32") {
64 PlatformMinVersion = VersionTuple(Maj, Min, Rev);
65 return;
66 }
67
68 // Set the appropriate OS version define.
69 if (Triple.isiOS()) {
70 assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
71 char Str[7];
72 if (Maj < 10) {
73 Str[0] = '0' + Maj;
74 Str[1] = '0' + (Min / 10);
75 Str[2] = '0' + (Min % 10);
76 Str[3] = '0' + (Rev / 10);
77 Str[4] = '0' + (Rev % 10);
78 Str[5] = '\0';
79 } else {
80 // Handle versions >= 10.
81 Str[0] = '0' + (Maj / 10);
82 Str[1] = '0' + (Maj % 10);
83 Str[2] = '0' + (Min / 10);
84 Str[3] = '0' + (Min % 10);
85 Str[4] = '0' + (Rev / 10);
86 Str[5] = '0' + (Rev % 10);
87 Str[6] = '\0';
88 }
89 if (Triple.isTvOS())
90 Builder.defineMacro("__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__", Str);
91 else
92 Builder.defineMacro("__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__",
93 Str);
94
95 } else if (Triple.isWatchOS()) {
96 assert(Maj < 10 && Min < 100 && Rev < 100 && "Invalid version!");
97 char Str[6];
98 Str[0] = '0' + Maj;
99 Str[1] = '0' + (Min / 10);
100 Str[2] = '0' + (Min % 10);
101 Str[3] = '0' + (Rev / 10);
102 Str[4] = '0' + (Rev % 10);
103 Str[5] = '\0';
104 Builder.defineMacro("__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__", Str);
105 } else if (Triple.isMacOSX()) {
106 // Note that the Driver allows versions which aren't representable in the
107 // define (because we only get a single digit for the minor and micro
108 // revision numbers). So, we limit them to the maximum representable
109 // version.
110 assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
111 char Str[7];
112 if (Maj < 10 || (Maj == 10 && Min < 10)) {
113 Str[0] = '0' + (Maj / 10);
114 Str[1] = '0' + (Maj % 10);
115 Str[2] = '0' + std::min(Min, 9U);
116 Str[3] = '0' + std::min(Rev, 9U);
117 Str[4] = '\0';
118 } else {
119 // Handle versions > 10.9.
120 Str[0] = '0' + (Maj / 10);
121 Str[1] = '0' + (Maj % 10);
122 Str[2] = '0' + (Min / 10);
123 Str[3] = '0' + (Min % 10);
124 Str[4] = '0' + (Rev / 10);
125 Str[5] = '0' + (Rev % 10);
126 Str[6] = '\0';
127 }
128 Builder.defineMacro("__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__", Str);
129 }
130
131 // Tell users about the kernel if there is one.
132 if (Triple.isOSDarwin())
133 Builder.defineMacro("__MACH__");
134
135 PlatformMinVersion = VersionTuple(Maj, Min, Rev);
136 }
137
addMinGWDefines(const llvm::Triple & Triple,const LangOptions & Opts,MacroBuilder & Builder)138 static void addMinGWDefines(const llvm::Triple &Triple, const LangOptions &Opts,
139 MacroBuilder &Builder) {
140 DefineStd(Builder, "WIN32", Opts);
141 DefineStd(Builder, "WINNT", Opts);
142 if (Triple.isArch64Bit()) {
143 DefineStd(Builder, "WIN64", Opts);
144 Builder.defineMacro("__MINGW64__");
145 }
146 Builder.defineMacro("__MSVCRT__");
147 Builder.defineMacro("__MINGW32__");
148 addCygMingDefines(Opts, Builder);
149 }
150
addVisualCDefines(const LangOptions & Opts,MacroBuilder & Builder)151 static void addVisualCDefines(const LangOptions &Opts, MacroBuilder &Builder) {
152 if (Opts.CPlusPlus) {
153 if (Opts.RTTIData)
154 Builder.defineMacro("_CPPRTTI");
155
156 if (Opts.CXXExceptions)
157 Builder.defineMacro("_CPPUNWIND");
158 }
159
160 if (Opts.Bool)
161 Builder.defineMacro("__BOOL_DEFINED");
162
163 if (!Opts.CharIsSigned)
164 Builder.defineMacro("_CHAR_UNSIGNED");
165
166 // FIXME: POSIXThreads isn't exactly the option this should be defined for,
167 // but it works for now.
168 if (Opts.POSIXThreads)
169 Builder.defineMacro("_MT");
170
171 if (Opts.MSCompatibilityVersion) {
172 Builder.defineMacro("_MSC_VER",
173 Twine(Opts.MSCompatibilityVersion / 100000));
174 Builder.defineMacro("_MSC_FULL_VER", Twine(Opts.MSCompatibilityVersion));
175 // FIXME We cannot encode the revision information into 32-bits
176 Builder.defineMacro("_MSC_BUILD", Twine(1));
177
178 if (Opts.CPlusPlus11 && Opts.isCompatibleWithMSVC(LangOptions::MSVC2015))
179 Builder.defineMacro("_HAS_CHAR16_T_LANGUAGE_SUPPORT", Twine(1));
180
181 if (Opts.isCompatibleWithMSVC(LangOptions::MSVC2015)) {
182 if (Opts.CPlusPlus20)
183 Builder.defineMacro("_MSVC_LANG", "201705L");
184 else if (Opts.CPlusPlus17)
185 Builder.defineMacro("_MSVC_LANG", "201703L");
186 else if (Opts.CPlusPlus14)
187 Builder.defineMacro("_MSVC_LANG", "201402L");
188 }
189 }
190
191 if (Opts.MicrosoftExt) {
192 Builder.defineMacro("_MSC_EXTENSIONS");
193
194 if (Opts.CPlusPlus11) {
195 Builder.defineMacro("_RVALUE_REFERENCES_V2_SUPPORTED");
196 Builder.defineMacro("_RVALUE_REFERENCES_SUPPORTED");
197 Builder.defineMacro("_NATIVE_NULLPTR_SUPPORTED");
198 }
199 }
200
201 Builder.defineMacro("_INTEGRAL_MAX_BITS", "64");
202 }
203
addWindowsDefines(const llvm::Triple & Triple,const LangOptions & Opts,MacroBuilder & Builder)204 void addWindowsDefines(const llvm::Triple &Triple, const LangOptions &Opts,
205 MacroBuilder &Builder) {
206 Builder.defineMacro("_WIN32");
207 if (Triple.isArch64Bit())
208 Builder.defineMacro("_WIN64");
209 if (Triple.isWindowsGNUEnvironment())
210 addMinGWDefines(Triple, Opts, Builder);
211 else if (Triple.isKnownWindowsMSVCEnvironment() ||
212 (Triple.isWindowsItaniumEnvironment() && Opts.MSVCCompat))
213 addVisualCDefines(Opts, Builder);
214 }
215
216 } // namespace targets
217 } // namespace clang
218