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150
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1 # See www/CMake.html for instructions on how to build libcxxabi with CMake.
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2
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3 #===============================================================================
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4 # Setup Project
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5 #===============================================================================
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6
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7 cmake_minimum_required(VERSION 3.4.3)
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8
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9 if(POLICY CMP0042)
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10 cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
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11 endif()
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12
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13 # Add path for custom modules
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14 set(CMAKE_MODULE_PATH
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15 "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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16 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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17 ${CMAKE_MODULE_PATH}
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18 )
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19
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20 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXXABI_STANDALONE_BUILD)
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21 project(libcxxabi CXX C)
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22
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23 set(PACKAGE_NAME libcxxabi)
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24 set(PACKAGE_VERSION 11.0.0git)
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25 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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26 set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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27
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28 # Find the LLVM sources and simulate LLVM CMake options.
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29 include(HandleOutOfTreeLLVM)
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30 endif()
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31
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32 # Require out of source build.
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33 include(MacroEnsureOutOfSourceBuild)
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34 MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
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35 "${PROJECT_NAME} requires an out of source build. Please create a separate
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36 build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
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37 )
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38
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39 #===============================================================================
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40 # Setup CMake Options
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41 #===============================================================================
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42 include(CMakeDependentOption)
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43 include(HandleCompilerRT)
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44
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45 # Define options.
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46 option(LIBCXXABI_ENABLE_EXCEPTIONS
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47 "Provide support for exceptions in the runtime.
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48 When disabled, libc++abi does not support stack unwinding and other exceptions-related features." ON)
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49 option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
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50 option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
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51 option(LIBCXXABI_ENABLE_PIC "Build Position-Independent Code, even in static library" ON)
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52 option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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53 option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
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54 option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF)
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55 option(LIBCXXABI_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
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56 option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON)
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57 option(LIBCXXABI_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
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58 option(LIBCXXABI_HAS_EXTERNAL_THREAD_API
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59 "Build libc++abi with an externalized threading API.
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60 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON." OFF)
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61 option(LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY
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62 "Build libc++abi with an externalized threading library.
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63 This option may only be set to ON when LIBCXXABI_ENABLE_THREADS=ON" OFF)
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64
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65 # FIXME: This option should default to off. Unfortunatly GCC 4.9 fails to link
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66 # programs to due undefined references to new/delete in libc++abi. Once this
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67 # has been fixed or worked around the default value should be changed.
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68 option(LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS
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69 "Build libc++abi with definitions for operator new/delete. Normally libc++
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70 provides these definitions" ON)
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71 option(LIBCXXABI_BUILD_32_BITS "Build 32 bit libc++abi." ${LLVM_BUILD_32_BITS})
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72 option(LIBCXXABI_INCLUDE_TESTS "Generate build targets for the libc++abi unit tests." ${LLVM_INCLUDE_TESTS})
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73 set(LIBCXXABI_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
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74 "Define suffix of library directory name (32/64)")
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75 option(LIBCXXABI_INSTALL_LIBRARY "Install the libc++abi library." ON)
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76 set(LIBCXXABI_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
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77 set(LIBCXXABI_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
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78 set(LIBCXXABI_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
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79 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.")
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80 set(LIBCXXABI_LIBRARY_VERSION "1.0" CACHE STRING
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81 "Version of libc++abi. This will be reflected in the name of the shared \
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82 library produced. For example, -DLIBCXXABI_LIBRARY_VERSION=x.y will \
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83 result in the library being named libc++abi.x.y.dylib, along with the \
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84 usual symlinks pointing to that.")
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85
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86 # Default to building a shared library so that the default options still test
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87 # the libc++abi that is being built. There are two problems with testing a
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88 # static libc++abi. In the case of a standalone build, the tests will link the
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89 # system's libc++, which might not have been built against our libc++abi. In the
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90 # case of an in tree build, libc++ will prefer a dynamic libc++abi from the
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91 # system over a static libc++abi from the output directory.
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92 option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON)
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93 option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON)
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94
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95 option(LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXXABI
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96 "Whether the libc++abi tests should link with the shared libc++abi library"
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97 ${LIBCXXABI_ENABLE_SHARED})
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98
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99 option(LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXX
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100 "Whether the libc++abi tests should link with the shared libc++ library"
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101 ${LIBCXX_ENABLE_SHARED})
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102
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103 cmake_dependent_option(LIBCXXABI_INSTALL_STATIC_LIBRARY
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104 "Install the static libc++abi library." ON
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105 "LIBCXXABI_ENABLE_STATIC;LIBCXXABI_INSTALL_LIBRARY" OFF)
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106 cmake_dependent_option(LIBCXXABI_INSTALL_SHARED_LIBRARY
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107 "Install the shared libc++abi library." ON
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108 "LIBCXXABI_ENABLE_SHARED;LIBCXXABI_INSTALL_LIBRARY" OFF)
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109
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110 cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY
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111 "Statically link the LLVM unwinder to static library" ON
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112 "LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_STATIC" OFF)
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113 cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY
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114 "Statically link the LLVM unwinder to shared library" ON
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115 "LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_SHARED" OFF)
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116
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117 option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF)
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118 # The default terminate handler attempts to demangle uncaught exceptions, which
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119 # causes extra I/O and demangling code to be pulled in.
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120 option(LIBCXXABI_SILENT_TERMINATE "Set this to make the terminate handler default to a silent alternative" OFF)
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121
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122 if (NOT LIBCXXABI_ENABLE_SHARED AND NOT LIBCXXABI_ENABLE_STATIC)
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123 message(FATAL_ERROR "libc++abi must be built as either a shared or static library.")
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124 endif()
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125
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126 if(LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXXABI AND NOT LIBCXXABI_ENABLE_SHARED)
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127 message(FATAL_ERROR "LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXXABI being ON requires LIBCXXABI_ENABLE_SHARED to be ON")
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128 endif()
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129
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130 if(NOT LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXXABI AND NOT LIBCXXABI_ENABLE_STATIC)
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131 message(FATAL_ERROR "LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXXABI being OFF requires LIBCXXABI_ENABLE_STATIC to be ON")
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132 endif()
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133
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134 if(DEFINED LIBCXX_ENABLE_SHARED
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135 AND LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXX
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136 AND NOT LIBCXX_ENABLE_SHARED)
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137 message(FATAL_ERROR "LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXX being ON requires LIBCXX_ENABLE_SHARED to be ON")
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138 endif()
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139
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140 if(DEFINED LIBCXX_ENABLE_STATIC
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141 AND NOT LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXX
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142 AND NOT LIBCXX_ENABLE_STATIC)
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143 message(FATAL_ERROR "LIBCXXABI_LINK_TESTS_WITH_SHARED_LIBCXX being OFF requires LIBCXX_ENABLE_STATIC to be ON")
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144 endif()
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145
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146 if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR)
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147 set(LIBCXXABI_LIBCXX_SRC_DIRS ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR})
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148 else()
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149 set(LIBCXXABI_LIBCXX_SRC_DIRS
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150 "${LLVM_MAIN_SRC_DIR}/projects/libcxx"
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151 "${LLVM_MAIN_SRC_DIR}/runtimes/libcxx"
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152 "${LLVM_MAIN_SRC_DIR}/../libcxx"
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153 )
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154 endif()
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155
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156 set(LIBCXXABI_LIBCXX_INCLUDE_DIRS "")
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157 foreach(dir ${LIBCXXABI_LIBCXX_SRC_DIRS})
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158 list(APPEND LIBCXXABI_LIBCXX_INCLUDE_DIRS "${dir}/include")
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159 endforeach()
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160
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161 find_path(
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162 LIBCXXABI_LIBCXX_INCLUDES
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163 __config
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164 PATHS ${LIBCXXABI_LIBCXX_INCLUDES}
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165 ${LIBCXXABI_LIBCXX_PATH}/include
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166 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBCXX_INCLUDES}
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167 ${LIBCXXABI_LIBCXX_INCLUDE_DIRS}
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168 ${LLVM_INCLUDE_DIR}/c++/v1
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169 NO_DEFAULT_PATH
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170 NO_CMAKE_FIND_ROOT_PATH
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171 )
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172
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173 set(LIBCXXABI_LIBCXX_INCLUDES "${LIBCXXABI_LIBCXX_INCLUDES}" CACHE PATH
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174 "Specify path to libc++ includes." FORCE)
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175
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176 find_path(
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177 LIBCXXABI_LIBCXX_PATH
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178 utils/libcxx/test/__init__.py
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179 PATHS ${LIBCXXABI_LIBCXX_PATH}
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180 ${LIBCXXABI_LIBCXX_INCLUDES}/../
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181 ${LIBCXXABI_LIBCXX_SRC_DIRS}
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182 NO_DEFAULT_PATH
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183 NO_CMAKE_FIND_ROOT_PATH
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184 )
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185
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186 if (LIBCXXABI_LIBCXX_PATH STREQUAL "LIBCXXABI_LIBCXX_PATH-NOTFOUND")
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187 message(WARNING "LIBCXXABI_LIBCXX_PATH was not specified and couldn't be infered.")
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188 set(LIBCXXABI_LIBCXX_PATH "")
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189 endif()
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190
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191 set(LIBCXXABI_LIBCXX_PATH "${LIBCXXABI_LIBCXX_PATH}" CACHE PATH
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192 "Specify path to libc++ source." FORCE)
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193
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194 option(LIBCXXABI_HERMETIC_STATIC_LIBRARY
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195 "Do not export any symbols from the static library." OFF)
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196
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197 #===============================================================================
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198 # Configure System
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199 #===============================================================================
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200
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201 # Add path for custom modules
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202 set(CMAKE_MODULE_PATH
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203 "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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204 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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205 ${CMAKE_MODULE_PATH}
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206 )
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207
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208 set(LIBCXXABI_COMPILER ${CMAKE_CXX_COMPILER})
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209 set(LIBCXXABI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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210 set(LIBCXXABI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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211
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212 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
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213 ${PACKAGE_VERSION})
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214
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215 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
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216 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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217 set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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218 if(LIBCXX_LIBDIR_SUBDIR)
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219 string(APPEND LIBCXXABI_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
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220 string(APPEND LIBCXXABI_INSTALL_LIBRARY_DIR /${LIBCXXABI_LIBDIR_SUBDIR})
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221 endif()
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222 elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
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223 set(LIBCXXABI_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
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224 set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
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225 else()
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226 set(LIBCXXABI_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXXABI_LIBDIR_SUFFIX})
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227 set(LIBCXXABI_INSTALL_LIBRARY_DIR lib${LIBCXXABI_LIBDIR_SUFFIX})
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228 endif()
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229
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230 set(LIBCXXABI_INSTALL_PREFIX "" CACHE STRING "Define libc++abi destination prefix.")
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231
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232 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
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233 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
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234 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXXABI_LIBRARY_DIR})
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235
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236 # By default, for non-standalone builds, libcxx and libcxxabi share a library
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237 # directory.
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238 if (NOT LIBCXXABI_LIBCXX_LIBRARY_PATH)
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239 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "${LIBCXXABI_LIBRARY_DIR}" CACHE PATH
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240 "The path to libc++ library." FORCE)
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241 endif()
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242
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243 # Check that we can build with 32 bits if requested.
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244 if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
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245 if (LIBCXXABI_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
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246 message(STATUS "Building 32 bits executables and libraries.")
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247 endif()
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248 elseif(LIBCXXABI_BUILD_32_BITS)
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249 message(FATAL_ERROR "LIBCXXABI_BUILD_32_BITS=ON is not supported on this platform.")
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250 endif()
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251
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252 # Declare libc++abi configuration variables.
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253 # They are intended for use as follows:
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254 # LIBCXXABI_C_FLAGS: General flags for both the c++ compiler and linker.
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255 # LIBCXXABI_CXX_FLAGS: General flags for both the c++ compiler and linker.
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256 # LIBCXXABI_COMPILE_FLAGS: Compile only flags.
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257 # LIBCXXABI_LINK_FLAGS: Linker only flags.
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258 # LIBCXXABI_LIBRARIES: libraries libc++abi is linked to.
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259
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260 set(LIBCXXABI_C_FLAGS "")
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261 set(LIBCXXABI_CXX_FLAGS "")
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262 set(LIBCXXABI_COMPILE_FLAGS "")
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263 set(LIBCXXABI_LINK_FLAGS "")
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264 set(LIBCXXABI_LIBRARIES "")
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265
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266 # Include macros for adding and removing libc++abi flags.
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267 include(HandleLibcxxabiFlags)
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268
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269 #===============================================================================
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270 # Setup Compiler Flags
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271 #===============================================================================
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272
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273 # Configure target flags
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274 add_target_flags_if(LIBCXXABI_BUILD_32_BITS "-m32")
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275
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276 if(LIBCXXABI_TARGET_TRIPLE)
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277 add_target_flags("--target=${LIBCXXABI_TARGET_TRIPLE}")
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278 elseif(CMAKE_CXX_COMPILER_TARGET)
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279 set(LIBCXXABI_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
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280 endif()
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281 if(LIBCXX_GCC_TOOLCHAIN)
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282 add_target_flags("--gcc-toolchain=${LIBCXXABI_GCC_TOOLCHAIN}")
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283 elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
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284 set(LIBCXXABI_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
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285 endif()
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286 if(LIBCXXABI_SYSROOT)
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287 add_target_flags("--sysroot=${LIBCXXABI_SYSROOT}")
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288 elseif(CMAKE_SYSROOT)
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289 set(LIBCXXABI_SYSROOT "${CMAKE_SYSROOT}")
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290 endif()
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291
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292 if (LIBCXXABI_TARGET_TRIPLE)
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293 set(TARGET_TRIPLE "${LIBCXXABI_TARGET_TRIPLE}")
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294 endif()
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295
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296 # Configure compiler. Must happen after setting the target flags.
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297 include(config-ix)
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298
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299 if (LIBCXXABI_HAS_NOSTDINCXX_FLAG)
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300 list(APPEND LIBCXXABI_COMPILE_FLAGS -nostdinc++)
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301 # cmake 3.14 and above remove system include paths that are explicitly
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302 # passed on the command line. We build with -nostdinc++ and explicitly add
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303 # just the libcxx system include paths with -I on the command line.
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304 # Setting CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES effectively prevents cmake
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305 # from removing these.
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306 # See: https://gitlab.kitware.com/cmake/cmake/issues/19227
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307 set(CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES "")
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308 # Remove -stdlib flags to prevent them from causing an unused flag warning.
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309 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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310 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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311 endif()
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312
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313 # Let the library headers know they are currently being used to build the
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314 # library.
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315 add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY)
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316
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317 # Disable DLL annotations on Windows for static builds.
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318 if (WIN32 AND LIBCXXABI_ENABLE_STATIC AND NOT LIBCXXABI_ENABLE_SHARED)
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319 add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
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320 endif()
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321
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322 add_compile_flags_if_supported(-Werror=return-type)
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323
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324 # Get warning flags
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325 add_compile_flags_if_supported(-W)
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326 add_compile_flags_if_supported(-Wall)
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327 add_compile_flags_if_supported(-Wchar-subscripts)
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328 add_compile_flags_if_supported(-Wconversion)
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329 add_compile_flags_if_supported(-Wmismatched-tags)
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330 add_compile_flags_if_supported(-Wmissing-braces)
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331 add_compile_flags_if_supported(-Wnewline-eof)
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332 add_compile_flags_if_supported(-Wunused-function)
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333 add_compile_flags_if_supported(-Wshadow)
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334 add_compile_flags_if_supported(-Wshorten-64-to-32)
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335 add_compile_flags_if_supported(-Wsign-compare)
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336 add_compile_flags_if_supported(-Wsign-conversion)
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337 add_compile_flags_if_supported(-Wstrict-aliasing=2)
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338 add_compile_flags_if_supported(-Wstrict-overflow=4)
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339 add_compile_flags_if_supported(-Wunused-parameter)
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340 add_compile_flags_if_supported(-Wunused-variable)
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341 add_compile_flags_if_supported(-Wwrite-strings)
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342 add_compile_flags_if_supported(-Wundef)
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343
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344 if (LIBCXXABI_ENABLE_WERROR)
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345 add_compile_flags_if_supported(-Werror)
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346 add_compile_flags_if_supported(-WX)
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347 else()
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348 add_compile_flags_if_supported(-Wno-error)
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349 add_compile_flags_if_supported(-WX-)
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350 endif()
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351 if (LIBCXXABI_ENABLE_PEDANTIC)
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352 add_compile_flags_if_supported(-pedantic)
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353 endif()
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354
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355 # Get feature flags.
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356 add_compile_flags_if_supported(-fstrict-aliasing)
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357
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358 # Exceptions
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359 if (LIBCXXABI_ENABLE_EXCEPTIONS)
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360 # Catches C++ exceptions only and tells the compiler to assume that extern C
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361 # functions never throw a C++ exception.
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362 add_compile_flags_if_supported(-EHsc)
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363 # Do we really need to be run through the C compiler ?
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364 add_c_compile_flags_if_supported(-funwind-tables)
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365 else()
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366 add_definitions(-D_LIBCXXABI_NO_EXCEPTIONS)
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367 add_compile_flags_if_supported(-fno-exceptions)
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368 add_compile_flags_if_supported(-EHs-)
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369 add_compile_flags_if_supported(-EHa-)
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370 endif()
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371
|
|
|
372 # Assert
|
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373 string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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|
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374 if (LIBCXXABI_ENABLE_ASSERTIONS)
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375 # MSVC doesn't like _DEBUG on release builds. See PR 4379.
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|
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376 if (NOT MSVC)
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377 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_DEBUG)
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378 endif()
|
|
|
379 # On Release builds cmake automatically defines NDEBUG, so we
|
|
|
380 # explicitly undefine it:
|
|
|
381 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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382 list(APPEND LIBCXXABI_COMPILE_FLAGS -UNDEBUG)
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|
|
383 endif()
|
|
|
384 else()
|
|
|
385 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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|
386 list(APPEND LIBCXXABI_COMPILE_FLAGS -DNDEBUG)
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|
|
387 endif()
|
|
|
388 endif()
|
|
|
389 # Static library
|
|
|
390 if (NOT LIBCXXABI_ENABLE_SHARED)
|
|
|
391 list(APPEND LIBCXXABI_COMPILE_FLAGS -D_LIBCPP_BUILD_STATIC)
|
|
|
392 endif()
|
|
|
393
|
|
|
394 # Threading
|
|
|
395 if (NOT LIBCXXABI_ENABLE_THREADS)
|
|
|
396 if (LIBCXXABI_HAS_PTHREAD_API)
|
|
|
397 message(FATAL_ERROR "LIBCXXABI_HAS_PTHREAD_API can only"
|
|
|
398 " be set to ON when LIBCXXABI_ENABLE_THREADS"
|
|
|
399 " is also set to ON.")
|
|
|
400 endif()
|
|
|
401 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
|
|
|
402 message(FATAL_ERROR "LIBCXXABI_HAS_EXTERNAL_THREAD_API can only"
|
|
|
403 " be set to ON when LIBCXXABI_ENABLE_THREADS"
|
|
|
404 " is also set to ON.")
|
|
|
405 endif()
|
|
|
406 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
|
|
|
407 message(FATAL_ERROR "LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY can only"
|
|
|
408 " be set to ON when LIBCXXABI_ENABLE_THREADS"
|
|
|
409 " is also set to ON.")
|
|
|
410 endif()
|
|
|
411 add_definitions(-D_LIBCXXABI_HAS_NO_THREADS)
|
|
|
412 endif()
|
|
|
413
|
|
|
414 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
|
|
|
415 if (LIBCXXABI_HAS_PTHREAD_API)
|
|
|
416 message(FATAL_ERROR "The options LIBCXXABI_HAS_EXTERNAL_THREAD_API"
|
|
|
417 " and LIBCXXABI_HAS_PTHREAD_API cannot be both"
|
|
|
418 " set to ON at the same time.")
|
|
|
419 endif()
|
|
|
420 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
|
|
|
421 message(FATAL_ERROR "The options LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY"
|
|
|
422 " and LIBCXXABI_HAS_EXTERNAL_THREAD_API cannot be both"
|
|
|
423 " set to ON at the same time.")
|
|
|
424 endif()
|
|
|
425 endif()
|
|
|
426
|
|
|
427 if (LLVM_ENABLE_MODULES)
|
|
|
428 # Ignore that the rest of the modules flags are now unused.
|
|
|
429 add_compile_flags_if_supported(-Wno-unused-command-line-argument)
|
|
|
430 add_compile_flags(-fno-modules)
|
|
|
431 endif()
|
|
|
432
|
|
|
433 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF)
|
|
|
434 if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS)
|
|
|
435 OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED)
|
|
|
436 OR MINGW)
|
|
|
437 set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON)
|
|
|
438 endif()
|
|
|
439
|
|
|
440 if (LIBCXXABI_HAS_UNDEFINED_SYMBOLS)
|
|
|
441 # Need to allow unresolved symbols if this is to work with shared library builds
|
|
|
442 if (APPLE)
|
|
|
443 list(APPEND LIBCXXABI_LINK_FLAGS "-undefined dynamic_lookup")
|
|
|
444 else()
|
|
|
445 # Relax this restriction from HandleLLVMOptions
|
|
|
446 string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
|
|
|
447 endif()
|
|
|
448 endif()
|
|
|
449
|
|
|
450 if (LIBCXXABI_HAS_PTHREAD_API)
|
|
|
451 add_definitions(-D_LIBCPP_HAS_THREAD_API_PTHREAD)
|
|
|
452 endif()
|
|
|
453
|
|
|
454 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)
|
|
|
455 add_definitions(-D_LIBCPP_HAS_THREAD_API_EXTERNAL)
|
|
|
456 endif()
|
|
|
457
|
|
|
458 if (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY)
|
|
|
459 add_definitions(-D_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
|
|
|
460 endif()
|
|
|
461
|
|
|
462 # Prevent libc++abi from having library dependencies on libc++
|
|
|
463 add_definitions(-D_LIBCPP_DISABLE_EXTERN_TEMPLATE)
|
|
|
464
|
|
|
465 # Bring back `std::unexpected`, which is removed in C++17, to support
|
|
|
466 # pre-C++17.
|
|
|
467 add_definitions(-D_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS)
|
|
|
468
|
|
|
469 if (MSVC)
|
|
|
470 add_definitions(-D_CRT_SECURE_NO_WARNINGS)
|
|
|
471 endif()
|
|
|
472
|
|
|
473 # Define LIBCXXABI_USE_LLVM_UNWINDER for conditional compilation.
|
|
|
474 if (LIBCXXABI_USE_LLVM_UNWINDER)
|
|
|
475 add_definitions(-DLIBCXXABI_USE_LLVM_UNWINDER)
|
|
|
476 endif()
|
|
|
477
|
|
|
478 if (LIBCXXABI_SILENT_TERMINATE)
|
|
|
479 add_definitions(-DLIBCXXABI_SILENT_TERMINATE)
|
|
|
480 endif()
|
|
|
481
|
|
|
482 if (LIBCXXABI_BAREMETAL)
|
|
|
483 add_definitions(-DLIBCXXABI_BAREMETAL)
|
|
|
484 endif()
|
|
|
485
|
|
|
486 if (LIBCXXABI_HAS_COMMENT_LIB_PRAGMA)
|
|
|
487 if (LIBCXXABI_HAS_PTHREAD_LIB)
|
|
|
488 add_definitions(-D_LIBCXXABI_LINK_PTHREAD_LIB)
|
|
|
489 endif()
|
|
|
490 endif()
|
|
|
491
|
|
|
492 string(REPLACE ";" " " LIBCXXABI_CXX_FLAGS "${LIBCXXABI_CXX_FLAGS}")
|
|
|
493 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LIBCXXABI_CXX_FLAGS}")
|
|
|
494 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}")
|
|
|
495
|
|
|
496 #===============================================================================
|
|
|
497 # Setup Source Code
|
|
|
498 #===============================================================================
|
|
|
499
|
|
|
500 set(LIBCXXABI_LIBUNWIND_INCLUDES "${LIBCXXABI_LIBUNWIND_INCLUDES}" CACHE PATH
|
|
|
501 "Specify path to libunwind includes." FORCE)
|
|
|
502 set(LIBCXXABI_LIBUNWIND_PATH "${LIBCXXABI_LIBUNWIND_PATH}" CACHE PATH
|
|
|
503 "Specify path to libunwind source." FORCE)
|
|
|
504
|
|
|
505 include_directories(include)
|
|
|
506 if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM)
|
|
|
507 find_path(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL libunwind.h
|
|
|
508 PATHS ${LIBCXXABI_LIBUNWIND_INCLUDES}
|
|
|
509 ${LIBCXXABI_LIBUNWIND_PATH}/include
|
|
|
510 ${CMAKE_BINARY_DIR}/${LIBCXXABI_LIBUNWIND_INCLUDES}
|
|
|
511 ${LLVM_MAIN_SRC_DIR}/projects/libunwind/include
|
|
|
512 ${LLVM_MAIN_SRC_DIR}/runtimes/libunwind/include
|
|
|
513 ${LLVM_MAIN_SRC_DIR}/../libunwind/include
|
|
|
514 NO_DEFAULT_PATH
|
|
|
515 NO_CMAKE_FIND_ROOT_PATH
|
|
|
516 )
|
|
|
517
|
|
|
518 if (LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND")
|
|
|
519 set(LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL "")
|
|
|
520 endif()
|
|
|
521
|
|
|
522 if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "")
|
|
|
523 include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}")
|
|
|
524 endif()
|
|
|
525 endif()
|
|
|
526
|
|
|
527 # Add source code. This also contains all of the logic for deciding linker flags
|
|
|
528 # soname, etc...
|
|
|
529 add_subdirectory(src)
|
|
|
530
|
|
|
531 if (LIBCXXABI_INCLUDE_TESTS)
|
|
|
532 if (LIBCXXABI_STANDALONE_BUILD AND NOT LIBCXXABI_ENABLE_SHARED)
|
|
|
533 # We can't reasonably test the system C++ library with a static
|
|
|
534 # libc++abi. We either need to be able to replace libc++abi at
|
|
|
535 # run time (with a shared libc++abi), or we need to be able to
|
|
|
536 # replace the C++ runtime (with a non- standalone build).
|
|
|
537 message(WARNING "The libc++abi tests aren't valid when libc++abi "
|
|
|
538 "is built standalone (i.e. outside of "
|
|
|
539 "llvm/projects/libcxxabi ) and is built without "
|
|
|
540 "a shared library. Either build a shared "
|
|
|
541 "library, build libc++abi at the same time as "
|
|
|
542 "you build libc++, or do without testing. No "
|
|
|
543 "check target will be available!")
|
|
|
544 else()
|
|
|
545 add_subdirectory(test)
|
|
|
546 add_subdirectory(fuzz)
|
|
|
547 endif()
|
|
|
548 endif()
|
