1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
5 # This module is shared by multiple languages; use include blocker.
9 set(__COMPILER_CLANG 1)
11 include(Compiler/CMakeCommonCompilerMacros)
13 set(__pch_header_C "c-header")
14 set(__pch_header_CXX "c++-header")
15 set(__pch_header_OBJC "objective-c-header")
16 set(__pch_header_OBJCXX "objective-c++-header")
18 if("x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC"
19 OR "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"
20 OR "x${CMAKE_Fortran_SIMULATE_ID}" STREQUAL "xMSVC")
21 macro(__compiler_clang lang)
26 macro(__compiler_clang lang)
27 __compiler_gnu(${lang})
28 set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE")
29 # Link options for PIE are already set in 'Compiler/GNU.cmake'
30 # but clang may require alternate syntax on some platforms
32 set(CMAKE_${lang}_LINK_OPTIONS_PIE ${CMAKE_${lang}_COMPILE_OPTIONS_PIE} -Xlinker -pie)
33 set(CMAKE_${lang}_LINK_OPTIONS_NO_PIE -Xlinker -no_pie)
35 set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
36 set(CMAKE_${lang}_COMPILE_OPTIONS_VISIBILITY "-fvisibility=")
37 if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4.0)
38 set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "-target ")
39 set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "-gcc-toolchain ")
41 set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "--target=")
42 set(CMAKE_${lang}_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN "--gcc-toolchain=")
44 set(CMAKE_${lang}_LINKER_WRAPPER_FLAG "-Xlinker" " ")
45 set(CMAKE_${lang}_LINKER_WRAPPER_FLAG_SEP)
47 if(CMAKE_${lang}_COMPILER_TARGET)
48 if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4.0)
49 list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "-target" "${CMAKE_${lang}_COMPILER_TARGET}")
51 list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "--target=${CMAKE_${lang}_COMPILER_TARGET}")
55 set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
56 set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
58 string(COMPARE EQUAL "${CMAKE_${lang}_COMPILER_ID}" "AppleClang" __is_apple_clang)
59 string(COMPARE EQUAL "${CMAKE_${lang}_COMPILER_ID}" "FujitsuClang" __is_fujitsu_clang)
61 # '-flto=thin' available since Clang 3.9 and Xcode 8
62 # * http://clang.llvm.org/docs/ThinLTO.html#clang-llvm
63 # * https://trac.macports.org/wiki/XcodeVersionInfo
64 set(_CMAKE_LTO_THIN TRUE)
66 if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 8.0)
67 set(_CMAKE_LTO_THIN FALSE)
69 elseif(__is_fujitsu_clang)
70 set(_CMAKE_LTO_THIN FALSE)
72 if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.9)
73 set(_CMAKE_LTO_THIN FALSE)
78 set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-flto=thin")
80 set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-flto")
83 if(ANDROID AND NOT CMAKE_ANDROID_NDK_VERSION VERSION_GREATER_EQUAL "22")
84 # https://github.com/android-ndk/ndk/issues/242
85 set(CMAKE_${lang}_LINK_OPTIONS_IPO "-fuse-ld=gold")
88 if(ANDROID OR __is_apple_clang)
89 set(__ar "${CMAKE_AR}")
90 set(__ranlib "${CMAKE_RANLIB}")
92 set(__ar "${CMAKE_${lang}_COMPILER_AR}")
93 set(__ranlib "${CMAKE_${lang}_COMPILER_RANLIB}")
96 set(CMAKE_${lang}_ARCHIVE_CREATE_IPO
97 "\"${__ar}\" cr <TARGET> <LINK_FLAGS> <OBJECTS>"
100 set(CMAKE_${lang}_ARCHIVE_APPEND_IPO
101 "\"${__ar}\" r <TARGET> <LINK_FLAGS> <OBJECTS>"
104 set(CMAKE_${lang}_ARCHIVE_FINISH_IPO
105 "\"${__ranlib}\" <TARGET>"
108 set(CMAKE_PCH_EXTENSION .pch)
109 if (NOT CMAKE_GENERATOR MATCHES "Xcode")
110 set(CMAKE_PCH_PROLOGUE "#pragma clang system_header")
112 if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 11.0.0 AND NOT __is_apple_clang)
113 set(CMAKE_${lang}_COMPILE_OPTIONS_INSTANTIATE_TEMPLATES_PCH -fpch-instantiate-templates)
115 set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Xclang -include-pch -Xclang <PCH_FILE> -Xclang -include -Xclang <PCH_HEADER>)
116 set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Xclang -emit-pch -Xclang -include -Xclang <PCH_HEADER> -x ${__pch_header_${lang}})
118 # '-fcolor-diagnostics' introduced since Clang 2.6
119 if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 2.6)
120 set(CMAKE_${lang}_COMPILE_OPTIONS_COLOR_DIAGNOSTICS "-fcolor-diagnostics")
121 set(CMAKE_${lang}_COMPILE_OPTIONS_COLOR_DIAGNOSTICS_OFF "-fno-color-diagnostics")
126 macro(__compiler_clang_cxx_standards lang)
127 if("x${CMAKE_${lang}_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
128 if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 2.1)
129 set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "-std=c++98")
130 set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
133 if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.1)
134 set(CMAKE_${lang}98_STANDARD__HAS_FULL_SUPPORT ON)
135 set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++11")
136 set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
137 set(CMAKE_${lang}11_STANDARD__HAS_FULL_SUPPORT ON)
138 elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 2.1)
139 set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++0x")
140 set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
143 if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.5)
144 set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std=c++14")
145 set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
146 set(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT ON)
147 elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4)
148 set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std=c++1y")
149 set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
150 set(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT ON)
153 set(_clang_version_std17 5.0)
154 if(CMAKE_SYSTEM_NAME STREQUAL "Android")
155 set(_clang_version_std17 6.0)
158 if (NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
159 set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std=c++17")
160 set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std=gnu++17")
161 elseif (NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.5)
162 set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std=c++1z")
163 set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
166 if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 11.0)
167 set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std=c++20")
168 set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std=gnu++20")
169 elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
170 set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std=c++2a")
171 set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std=gnu++2a")
174 unset(_clang_version_std17)
176 if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 12.0)
177 set(CMAKE_${lang}23_STANDARD_COMPILE_OPTION "-std=c++2b")
178 set(CMAKE_${lang}23_EXTENSION_COMPILE_OPTION "-std=gnu++2b")
181 if("x${CMAKE_${lang}_SIMULATE_ID}" STREQUAL "xMSVC")
182 # The MSVC standard library requires C++14, and MSVC itself has no
183 # notion of operating in a mode not aware of at least that standard.
184 set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "-std=c++14")
185 set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "-std=gnu++14")
186 set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++14")
187 set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++14")
189 # This clang++ is missing some features because of MSVC compatibility.
190 unset(CMAKE_${lang}11_STANDARD__HAS_FULL_SUPPORT)
191 unset(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT)
194 __compiler_check_default_language_standard(${lang} 2.1 98)
195 elseif(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 3.9
196 AND CMAKE_${lang}_SIMULATE_VERSION VERSION_GREATER_EQUAL 19.0)
197 # This version of clang-cl and the MSVC version it simulates have
198 # support for -std: flags.
199 set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "")
200 set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "")
201 set(CMAKE_${lang}98_STANDARD__HAS_FULL_SUPPORT ON)
202 set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "")
203 set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "")
204 set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std:c++14")
205 set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std:c++14")
207 if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0)
208 set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std:c++17")
209 set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std:c++17")
211 set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std:c++latest")
212 set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std:c++latest")
215 if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 13.0)
216 set(CMAKE_${lang}23_STANDARD_COMPILE_OPTION "-std:c++latest")
217 set(CMAKE_${lang}23_EXTENSION_COMPILE_OPTION "-std:c++latest")
218 set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std:c++20")
219 set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std:c++20")
220 elseif(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0)
221 set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std:c++latest")
222 set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std:c++latest")
225 __compiler_check_default_language_standard(${lang} 3.9 14)
227 # This version of clang-cl, or the MSVC version it simulates, does not have
228 # language standards. Set these options as empty strings so the feature
229 # test infrastructure can at least check to see if they are defined.
230 set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "")
231 set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "")
232 set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "")
233 set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "")
234 set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "")
235 set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "")
236 set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "")
237 set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "")
238 set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "")
239 set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "")
240 set(CMAKE_${lang}23_STANDARD_COMPILE_OPTION "")
241 set(CMAKE_${lang}23_EXTENSION_COMPILE_OPTION "")
243 # There is no meaningful default for this
244 set(CMAKE_${lang}_STANDARD_DEFAULT "")
246 # There are no compiler modes so we only need to test features once.
247 # Override the default macro for this special case. Pretend that
248 # all language standards are available so that at least compilation
250 macro(cmake_record_${lang}_compile_features)
251 list(APPEND CMAKE_${lang}_COMPILE_FEATURES
259 _record_compiler_features(${lang} "" CMAKE_${lang}_COMPILE_FEATURES)