1 include(ExternalProject) 2 3 # llvm_ExternalProject_BuildCmd(out_var target) 4 # Utility function for constructing command lines for external project targets 5 function(llvm_ExternalProject_BuildCmd out_var target) 6 if (CMAKE_GENERATOR MATCHES "Make") 7 # Use special command for Makefiles to support parallelism. 8 set(${out_var} "$(MAKE)" "${target}" PARENT_SCOPE) 9 else() 10 set(${out_var} ${CMAKE_COMMAND} --build . --target ${target} 11 --config $<CONFIGURATION> PARENT_SCOPE) 12 endif() 13 endfunction() 14 15 # llvm_ExternalProject_Add(name source_dir ... 16 # USE_TOOLCHAIN 17 # Use just-built tools (see TOOLCHAIN_TOOLS) 18 # EXCLUDE_FROM_ALL 19 # Exclude this project from the all target 20 # NO_INSTALL 21 # Don't generate install targets for this project 22 # CMAKE_ARGS arguments... 23 # Optional cmake arguments to pass when configuring the project 24 # TOOLCHAIN_TOOLS targets... 25 # Targets for toolchain tools (defaults to clang;lld) 26 # DEPENDS targets... 27 # Targets that this project depends on 28 # EXTRA_TARGETS targets... 29 # Extra targets in the subproject to generate targets for 30 # ) 31 function(llvm_ExternalProject_Add name source_dir) 32 cmake_parse_arguments(ARG "USE_TOOLCHAIN;EXCLUDE_FROM_ALL;NO_INSTALL" 33 "SOURCE_DIR" 34 "CMAKE_ARGS;TOOLCHAIN_TOOLS;RUNTIME_LIBRARIES;DEPENDS;EXTRA_TARGETS" ${ARGN}) 35 canonicalize_tool_name(${name} nameCanon) 36 if(NOT ARG_TOOLCHAIN_TOOLS) 37 set(ARG_TOOLCHAIN_TOOLS clang lld) 38 endif() 39 foreach(tool ${ARG_TOOLCHAIN_TOOLS}) 40 if(TARGET ${tool}) 41 list(APPEND TOOLCHAIN_TOOLS ${tool}) 42 list(APPEND TOOLCHAIN_BINS $<TARGET_FILE:${tool}>) 43 endif() 44 endforeach() 45 46 if(NOT ARG_RUNTIME_LIBRARIES) 47 set(ARG_RUNTIME_LIBRARIES compiler-rt libcxx) 48 endif() 49 foreach(lib ${ARG_RUNTIME_LIBRARIES}) 50 if(TARGET ${lib}) 51 list(APPEND RUNTIME_LIBRARIES ${lib}) 52 endif() 53 endforeach() 54 55 list(FIND TOOLCHAIN_TOOLS clang FOUND_CLANG) 56 if(FOUND_CLANG GREATER -1) 57 set(CLANG_IN_TOOLCHAIN On) 58 endif() 59 60 if(RUNTIME_LIBRARIES AND CLANG_IN_TOOLCHAIN) 61 list(APPEND TOOLCHAIN_BINS ${RUNTIME_LIBRARIES}) 62 endif() 63 64 if(CMAKE_VERSION VERSION_GREATER 3.1.0) 65 set(cmake_3_1_EXCLUDE_FROM_ALL EXCLUDE_FROM_ALL 1) 66 endif() 67 68 if(CMAKE_VERSION VERSION_GREATER 3.3.20150708) 69 set(cmake_3_4_USES_TERMINAL_OPTIONS 70 USES_TERMINAL_CONFIGURE 1 71 USES_TERMINAL_BUILD 1 72 USES_TERMINAL_INSTALL 1 73 ) 74 set(cmake_3_4_USES_TERMINAL USES_TERMINAL 1) 75 endif() 76 77 if(CMAKE_VERSION VERSION_GREATER 3.1.20141116) 78 set(cmake_3_2_USES_TERMINAL USES_TERMINAL) 79 endif() 80 81 set(STAMP_DIR ${CMAKE_CURRENT_BINARY_DIR}/${name}-stamps/) 82 set(BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${name}-bins/) 83 84 add_custom_target(${name}-clear 85 COMMAND ${CMAKE_COMMAND} -E remove_directory ${BINARY_DIR} 86 COMMAND ${CMAKE_COMMAND} -E remove_directory ${STAMP_DIR} 87 COMMENT "Clobbering ${name} build and stamp directories" 88 ${cmake_3_2_USES_TERMINAL} 89 ) 90 91 # Find all variables that start with COMPILER_RT and populate a variable with 92 # them. 93 get_cmake_property(variableNames VARIABLES) 94 foreach(variableName ${variableNames}) 95 if(variableName MATCHES "^${nameCanon}") 96 string(REPLACE ";" "\;" value "${${variableName}}") 97 list(APPEND PASSTHROUGH_VARIABLES 98 -D${variableName}=${value}) 99 endif() 100 endforeach() 101 102 if(ARG_USE_TOOLCHAIN) 103 if(CLANG_IN_TOOLCHAIN) 104 set(compiler_args -DCMAKE_C_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang 105 -DCMAKE_CXX_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++) 106 endif() 107 list(APPEND ARG_DEPENDS ${TOOLCHAIN_TOOLS}) 108 endif() 109 110 add_custom_command( 111 OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp 112 DEPENDS ${ARG_DEPENDS} 113 COMMAND ${CMAKE_COMMAND} -E touch ${BINARY_DIR}/CMakeCache.txt 114 COMMAND ${CMAKE_COMMAND} -E touch ${STAMP_DIR}/${name}-mkdir 115 COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp 116 COMMENT "Clobbering bootstrap build and stamp directories" 117 ) 118 119 add_custom_target(${name}-clobber 120 DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp) 121 122 if(ARG_EXCLUDE_FROM_ALL) 123 set(exclude ${cmake_3_1_EXCLUDE_FROM_ALL}) 124 endif() 125 126 ExternalProject_Add(${name} 127 DEPENDS ${ARG_DEPENDS} 128 ${name}-clobber 129 PREFIX ${CMAKE_BINARY_DIR}/projects/${name} 130 SOURCE_DIR ${source_dir} 131 STAMP_DIR ${STAMP_DIR} 132 BINARY_DIR ${BINARY_DIR} 133 ${exclude} 134 CMAKE_ARGS ${${nameCanon}_CMAKE_ARGS} 135 ${compiler_args} 136 -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} 137 ${ARG_CMAKE_ARGS} 138 ${PASSTHROUGH_VARIABLES} 139 INSTALL_COMMAND "" 140 STEP_TARGETS configure build 141 ${cmake_3_4_USES_TERMINAL_OPTIONS} 142 ) 143 144 if(ARG_USE_TOOLCHAIN) 145 ExternalProject_Add_Step(${name} force-rebuild 146 COMMENT "Forcing rebuild becaues tools have changed" 147 DEPENDERS configure 148 DEPENDS ${TOOLCHAIN_BINS} 149 ${cmake_3_4_USES_TERMINAL} ) 150 endif() 151 152 if(ARG_USE_TOOLCHAIN) 153 set(force_deps DEPENDS ${TOOLCHAIN_BINS}) 154 endif() 155 156 llvm_ExternalProject_BuildCmd(run_clean clean) 157 ExternalProject_Add_Step(${name} clean 158 COMMAND ${run_clean} 159 COMMENT "Cleaning ${name}..." 160 DEPENDEES configure 161 ${force_deps} 162 WORKING_DIRECTORY ${BINARY_DIR} 163 ${cmake_3_4_USES_TERMINAL} 164 ) 165 ExternalProject_Add_StepTargets(${name} clean) 166 167 if(ARG_USE_TOOLCHAIN) 168 add_dependencies(${name}-clean ${name}-clobber) 169 set_target_properties(${name}-clean PROPERTIES 170 SOURCES ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp) 171 endif() 172 173 if(NOT ARG_NO_INSTALL) 174 install(CODE "execute_process\(COMMAND \${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=\${CMAKE_INSTALL_PREFIX} -P ${BINARY_DIR}/cmake_install.cmake \)" 175 COMPONENT ${name}) 176 177 add_custom_target(install-${name} 178 DEPENDS ${name} 179 COMMAND "${CMAKE_COMMAND}" 180 -DCMAKE_INSTALL_COMPONENT=${name} 181 -P "${CMAKE_BINARY_DIR}/cmake_install.cmake" 182 ${cmake_3_2_USES_TERMINAL}) 183 endif() 184 185 # Add top-level targets 186 foreach(target ${ARG_EXTRA_TARGETS}) 187 llvm_ExternalProject_BuildCmd(build_runtime_cmd ${target}) 188 add_custom_target(${target} 189 COMMAND ${build_runtime_cmd} 190 DEPENDS ${name}-configure 191 WORKING_DIRECTORY ${BINARY_DIR} 192 VERBATIM 193 ${cmake_3_2_USES_TERMINAL}) 194 endforeach() 195 endfunction() 196
