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150
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1 #===============================================================================
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2 # Setup Project
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3 #===============================================================================
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4
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5 cmake_minimum_required(VERSION 3.4.3)
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6
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7 if (POLICY CMP0042)
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8 cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
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9 endif()
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10
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11 # Add path for custom modules
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12 set(CMAKE_MODULE_PATH
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13 "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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14 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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15 ${CMAKE_MODULE_PATH}
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16 )
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17
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18 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBUNWIND_STANDALONE_BUILD)
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19 project(libunwind LANGUAGES C CXX ASM)
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20
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21 # Rely on llvm-config.
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22 set(CONFIG_OUTPUT)
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23 if(NOT LLVM_CONFIG_PATH)
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24 find_program(LLVM_CONFIG_PATH "llvm-config")
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25 endif()
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26 if (DEFINED LLVM_PATH)
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27 set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
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28 set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
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29 set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
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30 set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
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31 elseif(LLVM_CONFIG_PATH)
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32 message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}")
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33 set(CONFIG_COMMAND ${LLVM_CONFIG_PATH} "--includedir" "--prefix" "--src-root")
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34 execute_process(COMMAND ${CONFIG_COMMAND}
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35 RESULT_VARIABLE HAD_ERROR
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36 OUTPUT_VARIABLE CONFIG_OUTPUT)
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37 if (NOT HAD_ERROR)
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38 string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";"
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39 CONFIG_OUTPUT ${CONFIG_OUTPUT})
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40 else()
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41 string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
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42 message(STATUS "${CONFIG_COMMAND_STR}")
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43 message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
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44 endif()
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45
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46 list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
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47 list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
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48 list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR)
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49
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50 set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
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51 set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
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52 set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
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53 set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
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54
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55 # --cmakedir is supported since llvm r291218 (4.0 release)
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56 execute_process(
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57 COMMAND ${LLVM_CONFIG_PATH} --cmakedir
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58 RESULT_VARIABLE HAD_ERROR
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59 OUTPUT_VARIABLE CONFIG_OUTPUT
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60 ERROR_QUIET)
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61 if(NOT HAD_ERROR)
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62 string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH_FROM_LLVM_CONFIG)
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63 file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH_FROM_LLVM_CONFIG}" LLVM_CMAKE_PATH)
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64 else()
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65 file(TO_CMAKE_PATH "${LLVM_BINARY_DIR}" LLVM_BINARY_DIR_CMAKE_STYLE)
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66 set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
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67 endif()
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68 else()
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69 message(WARNING "UNSUPPORTED LIBUNWIND CONFIGURATION DETECTED: "
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70 "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
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71 "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
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72 "or -DLLVM_PATH=path/to/llvm-source-root.")
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73 endif()
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74
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75 if (EXISTS ${LLVM_CMAKE_PATH})
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76 # Enable warnings, otherwise -w gets added to the cflags by HandleLLVMOptions.
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77 set(LLVM_ENABLE_WARNINGS ON)
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78 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
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79 include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
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80 include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
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81 else()
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82 message(WARNING "Not found: ${LLVM_CMAKE_PATH}")
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83 endif()
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84
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85 set(PACKAGE_NAME libunwind)
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86 set(PACKAGE_VERSION 11.0.0git)
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87 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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88 set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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89
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90 if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
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91 set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
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92 else()
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93 # Seek installed Lit.
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94 find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
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95 DOC "Path to lit.py")
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96 endif()
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97
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98 if (LLVM_LIT)
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99 # Define the default arguments to use with 'lit', and an option for the user
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100 # to override.
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101 set(LIT_ARGS_DEFAULT "-sv")
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102 if (MSVC OR XCODE)
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103 set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
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104 endif()
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105 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
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106
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107 # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
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108 if (WIN32 AND NOT CYGWIN)
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109 set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
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110 endif()
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111 else()
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112 set(LLVM_INCLUDE_TESTS OFF)
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113 endif()
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114
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115 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
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116 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
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117 else()
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118 set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
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119 endif()
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120
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121 #===============================================================================
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122 # Setup CMake Options
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123 #===============================================================================
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124 include(CMakeDependentOption)
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125 include(HandleCompilerRT)
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126
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127 # Define options.
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128 option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS})
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129 option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
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130 option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
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131 option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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132 option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
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133 option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
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134 option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
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135 option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
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136 option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
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137 option(LIBUNWIND_WEAK_PTHREAD_LIB "Use weak references to refer to pthread functions." OFF)
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138 option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
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139 option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
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140
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141 set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
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142 "Define suffix of library directory name (32/64)")
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143 option(LIBUNWIND_INSTALL_LIBRARY "Install the libunwind library." ON)
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144 cmake_dependent_option(LIBUNWIND_INSTALL_STATIC_LIBRARY
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145 "Install the static libunwind library." ON
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146 "LIBUNWIND_ENABLE_STATIC;LIBUNWIND_INSTALL_LIBRARY" OFF)
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147 cmake_dependent_option(LIBUNWIND_INSTALL_SHARED_LIBRARY
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148 "Install the shared libunwind library." ON
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149 "LIBUNWIND_ENABLE_SHARED;LIBUNWIND_INSTALL_LIBRARY" OFF)
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150 set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
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151 set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
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152 set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
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153 set(LIBUNWIND_TEST_LINKER_FLAGS "" CACHE STRING
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154 "Additional linker flags for test programs.")
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155 set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING
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156 "Additional compiler flags for test programs.")
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157
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158 if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
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159 message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
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160 endif()
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161
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162 # Check that we can build with 32 bits if requested.
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163 if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
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164 if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
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165 message(STATUS "Building 32 bits executables and libraries.")
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166 endif()
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167 elseif(LIBUNWIND_BUILD_32_BITS)
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168 message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.")
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169 endif()
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170
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171 option(LIBUNWIND_HERMETIC_STATIC_LIBRARY
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172 "Do not export any symbols from the static library." OFF)
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173
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174 #===============================================================================
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175 # Configure System
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176 #===============================================================================
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177
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178 # Add path for custom modules
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179 set(CMAKE_MODULE_PATH
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180 "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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181 ${CMAKE_MODULE_PATH})
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182
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183 set(LIBUNWIND_COMPILER ${CMAKE_CXX_COMPILER})
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184 set(LIBUNWIND_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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185 set(LIBUNWIND_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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186
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187 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
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188 ${PACKAGE_VERSION})
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189
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190 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
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191 set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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192 set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
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193 if(LIBCXX_LIBDIR_SUBDIR)
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194 string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
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195 string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
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196 endif()
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197 elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
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198 set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
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199 set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
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200 else()
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201 set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
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202 set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
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203 endif()
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204
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205 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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206 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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207 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})
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208
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209 set(LIBUNWIND_INSTALL_PREFIX "" CACHE STRING "Define libunwind destination prefix.")
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210
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211 set(LIBUNWIND_C_FLAGS "")
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212 set(LIBUNWIND_CXX_FLAGS "")
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213 set(LIBUNWIND_COMPILE_FLAGS "")
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214 set(LIBUNWIND_LINK_FLAGS "")
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215
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216 # Include macros for adding and removing libunwind flags.
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217 include(HandleLibunwindFlags)
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218
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219 #===============================================================================
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220 # Setup Compiler Flags
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221 #===============================================================================
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222
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223 # Get required flags.
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224 add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32")
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225
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226 if(LIBUNWIND_TARGET_TRIPLE)
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227 add_target_flags("--target=${LIBUNWIND_TARGET_TRIPLE}")
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228 elseif(CMAKE_CXX_COMPILER_TARGET)
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229 set(LIBUNWIND_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
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230 endif()
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231 if(LIBUNWIND_GCC_TOOLCHAIN)
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232 add_target_flags("--gcc-toolchain=${LIBUNWIND_GCC_TOOLCHAIN}")
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233 elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
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234 set(LIBUNWIND_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
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235 endif()
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236 if(LIBUNWIND_SYSROOT)
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237 add_target_flags("--sysroot=${LIBUNWIND_SYSROOT}")
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238 elseif(CMAKE_SYSROOT)
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239 set(LIBUNWIND_SYSROOT "${CMAKE_SYSROOT}")
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240 endif()
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241
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242 if (LIBUNWIND_TARGET_TRIPLE)
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243 set(TARGET_TRIPLE "${LIBUNWIND_TARGET_TRIPLE}")
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244 endif()
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245
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246 # Configure compiler.
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247 include(config-ix)
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248
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249 if (LIBUNWIND_USE_COMPILER_RT AND NOT LIBUNWIND_HAS_NODEFAULTLIBS_FLAG)
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250 list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt")
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251 endif()
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252
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253 add_compile_flags_if_supported(-Werror=return-type)
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254
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255 # Get warning flags
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256 add_compile_flags_if_supported(-W)
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257 add_compile_flags_if_supported(-Wall)
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258 add_compile_flags_if_supported(-Wchar-subscripts)
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259 add_compile_flags_if_supported(-Wconversion)
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260 add_compile_flags_if_supported(-Wmismatched-tags)
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261 add_compile_flags_if_supported(-Wmissing-braces)
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262 add_compile_flags_if_supported(-Wnewline-eof)
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263 add_compile_flags_if_supported(-Wno-unused-function)
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264 add_compile_flags_if_supported(-Wshadow)
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265 add_compile_flags_if_supported(-Wshorten-64-to-32)
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266 add_compile_flags_if_supported(-Wsign-compare)
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267 add_compile_flags_if_supported(-Wsign-conversion)
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268 add_compile_flags_if_supported(-Wstrict-aliasing=2)
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269 add_compile_flags_if_supported(-Wstrict-overflow=4)
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270 add_compile_flags_if_supported(-Wunused-parameter)
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271 add_compile_flags_if_supported(-Wunused-variable)
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272 add_compile_flags_if_supported(-Wwrite-strings)
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273 add_compile_flags_if_supported(-Wundef)
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274
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275 if (LIBUNWIND_ENABLE_WERROR)
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276 add_compile_flags_if_supported(-Werror)
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277 add_compile_flags_if_supported(-WX)
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278 else()
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279 add_compile_flags_if_supported(-Wno-error)
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280 add_compile_flags_if_supported(-WX-)
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281 endif()
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282
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283 if (LIBUNWIND_ENABLE_PEDANTIC)
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284 add_compile_flags_if_supported(-pedantic)
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285 endif()
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286
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287 # Get feature flags.
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288 # Exceptions
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289 # Catches C++ exceptions only and tells the compiler to assume that extern C
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290 # functions never throw a C++ exception.
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291 add_cxx_compile_flags_if_supported(-fstrict-aliasing)
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292 add_cxx_compile_flags_if_supported(-EHsc)
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293
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294 # Don't run the linker in this CMake check.
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295 #
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296 # The reason why this was added is that when building libunwind for
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297 # ARM Linux, we need to pass the -funwind-tables flag in order for it to
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298 # work properly with ARM EHABI.
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299 #
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300 # However, when performing CMake checks, adding this flag causes the check
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301 # to produce a false negative, because the compiler generates calls
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302 # to __aeabi_unwind_cpp_pr0, which is defined in libunwind itself,
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303 # which isn't built yet, so the linker complains about undefined symbols.
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304 #
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305 # This leads to libunwind not being built with this flag, which makes
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306 # libunwind quite useless in this setup.
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307 set(_previous_CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
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308 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
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309 add_compile_flags_if_supported(-funwind-tables)
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310 set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_previous_CMAKE_TRY_COMPILE_TARGET_TYPE})
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311
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312 if (LIBUNWIND_USES_ARM_EHABI AND NOT LIBUNWIND_SUPPORTS_FUNWIND_TABLES_FLAG)
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313 message(SEND_ERROR "The -funwind-tables flag must be supported "
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314 "because this target uses ARM Exception Handling ABI")
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315 endif()
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316
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317 add_cxx_compile_flags_if_supported(-fno-exceptions)
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318 add_cxx_compile_flags_if_supported(-fno-rtti)
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319
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320 # Ensure that we don't depend on C++ standard library.
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321 if (LIBUNWIND_HAS_NOSTDINCXX_FLAG)
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322 list(APPEND LIBUNWIND_COMPILE_FLAGS -nostdinc++)
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323 # Remove -stdlib flags to prevent them from causing an unused flag warning.
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324 string(REPLACE "-stdlib=libc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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325 string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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326 endif()
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327
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328 # Assert
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329 string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
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330 if (LIBUNWIND_ENABLE_ASSERTIONS)
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331 # MSVC doesn't like _DEBUG on release builds. See PR 4379.
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332 if (NOT MSVC)
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333 add_compile_flags(-D_DEBUG)
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334 endif()
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335
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336 # On Release builds cmake automatically defines NDEBUG, so we
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337 # explicitly undefine it:
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338 if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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339 add_compile_flags(-UNDEBUG)
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340 endif()
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341 else()
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342 if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
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343 add_compile_flags(-DNDEBUG)
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344 endif()
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345 endif()
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346
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347 # Cross-unwinding
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348 if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
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349 add_compile_flags(-D_LIBUNWIND_IS_NATIVE_ONLY)
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350 endif()
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351
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352 # Threading-support
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353 if (NOT LIBUNWIND_ENABLE_THREADS)
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354 add_compile_flags(-D_LIBUNWIND_HAS_NO_THREADS)
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355 endif()
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356
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357 # ARM WMMX register support
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358 if (LIBUNWIND_ENABLE_ARM_WMMX)
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359 # __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not
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360 # define this macro for any supported target at present. Therefore, here we
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361 # provide the option to explicitly enable support for WMMX registers in the
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362 # unwinder.
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363 add_compile_flags(-D__ARM_WMMX)
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364 endif()
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365
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366 # This is the _ONLY_ place where add_definitions is called.
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367 if (MSVC)
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368 add_definitions(-D_CRT_SECURE_NO_WARNINGS)
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369 endif()
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370
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371 # Disable DLL annotations on Windows for static builds.
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372 if (WIN32 AND LIBUNWIND_ENABLE_STATIC AND NOT LIBUNWIND_ENABLE_SHARED)
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373 add_definitions(-D_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
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374 endif()
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375
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376 if (LIBUNWIND_HAS_COMMENT_LIB_PRAGMA)
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377 if (LIBUNWIND_HAS_DL_LIB)
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378 add_definitions(-D_LIBUNWIND_LINK_DL_LIB)
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379 endif()
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380 if (LIBUNWIND_HAS_PTHREAD_LIB)
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381 add_definitions(-D_LIBUNWIND_LINK_PTHREAD_LIB)
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382 endif()
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|
|
383 endif()
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384
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|
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385 #===============================================================================
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|
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386 # Setup Source Code
|
|
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387 #===============================================================================
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388
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389 include_directories(include)
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390
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391 add_subdirectory(src)
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392
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393 if (LIBUNWIND_INCLUDE_DOCS)
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394 add_subdirectory(docs)
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|
|
395 endif()
|
|
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396
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|
|
397 if (EXISTS ${LLVM_CMAKE_PATH})
|
|
|
398 add_subdirectory(test)
|
|
|
399 endif()
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