include(ExternalProject) # llvm_ExternalProject_BuildCmd(out_var target) # Utility function for constructing command lines for external project targets function(llvm_ExternalProject_BuildCmd out_var target) if (CMAKE_GENERATOR MATCHES "Make") # Use special command for Makefiles to support parallelism. set(${out_var} "$(MAKE)" "${target}" PARENT_SCOPE) else() set(${out_var} ${CMAKE_COMMAND} --build . --target ${target} --config $ PARENT_SCOPE) endif() endfunction() # llvm_ExternalProject_Add(name source_dir ... # USE_TOOLCHAIN # Use just-built tools (see TOOLCHAIN_TOOLS) # EXCLUDE_FROM_ALL # Exclude this project from the all target # NO_INSTALL # Don't generate install targets for this project # CMAKE_ARGS arguments... # Optional cmake arguments to pass when configuring the project # TOOLCHAIN_TOOLS targets... # Targets for toolchain tools (defaults to clang;lld) # DEPENDS targets... # Targets that this project depends on # EXTRA_TARGETS targets... # Extra targets in the subproject to generate targets for # ) function(llvm_ExternalProject_Add name source_dir) cmake_parse_arguments(ARG "USE_TOOLCHAIN;EXCLUDE_FROM_ALL;NO_INSTALL" "SOURCE_DIR" "CMAKE_ARGS;TOOLCHAIN_TOOLS;RUNTIME_LIBRARIES;DEPENDS;EXTRA_TARGETS" ${ARGN}) canonicalize_tool_name(${name} nameCanon) if(NOT ARG_TOOLCHAIN_TOOLS) set(ARG_TOOLCHAIN_TOOLS clang lld) endif() foreach(tool ${ARG_TOOLCHAIN_TOOLS}) if(TARGET ${tool}) list(APPEND TOOLCHAIN_TOOLS ${tool}) list(APPEND TOOLCHAIN_BINS $) endif() endforeach() if(NOT ARG_RUNTIME_LIBRARIES) set(ARG_RUNTIME_LIBRARIES compiler-rt libcxx) endif() foreach(lib ${ARG_RUNTIME_LIBRARIES}) if(TARGET ${lib}) list(APPEND RUNTIME_LIBRARIES ${lib}) endif() endforeach() list(FIND TOOLCHAIN_TOOLS clang FOUND_CLANG) if(FOUND_CLANG GREATER -1) set(CLANG_IN_TOOLCHAIN On) endif() if(RUNTIME_LIBRARIES AND CLANG_IN_TOOLCHAIN) list(APPEND TOOLCHAIN_BINS ${RUNTIME_LIBRARIES}) endif() if(CMAKE_VERSION VERSION_GREATER 3.1.0) set(cmake_3_1_EXCLUDE_FROM_ALL EXCLUDE_FROM_ALL 1) endif() if(CMAKE_VERSION VERSION_GREATER 3.3.20150708) set(cmake_3_4_USES_TERMINAL_OPTIONS USES_TERMINAL_CONFIGURE 1 USES_TERMINAL_BUILD 1 USES_TERMINAL_INSTALL 1 ) set(cmake_3_4_USES_TERMINAL USES_TERMINAL 1) endif() if(CMAKE_VERSION VERSION_GREATER 3.1.20141116) set(cmake_3_2_USES_TERMINAL USES_TERMINAL) endif() set(STAMP_DIR ${CMAKE_CURRENT_BINARY_DIR}/${name}-stamps/) set(BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${name}-bins/) add_custom_target(${name}-clear COMMAND ${CMAKE_COMMAND} -E remove_directory ${BINARY_DIR} COMMAND ${CMAKE_COMMAND} -E remove_directory ${STAMP_DIR} COMMENT "Clobbering ${name} build and stamp directories" ${cmake_3_2_USES_TERMINAL} ) # Find all variables that start with COMPILER_RT and populate a variable with # them. get_cmake_property(variableNames VARIABLES) foreach(variableName ${variableNames}) if(variableName MATCHES "^${nameCanon}") string(REPLACE ";" "\;" value "${${variableName}}") list(APPEND PASSTHROUGH_VARIABLES -D${variableName}=${value}) endif() endforeach() if(ARG_USE_TOOLCHAIN) if(CLANG_IN_TOOLCHAIN) set(compiler_args -DCMAKE_C_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang -DCMAKE_CXX_COMPILER=${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++) endif() list(APPEND ARG_DEPENDS ${TOOLCHAIN_TOOLS}) endif() add_custom_command( OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp DEPENDS ${ARG_DEPENDS} COMMAND ${CMAKE_COMMAND} -E touch ${BINARY_DIR}/CMakeCache.txt COMMAND ${CMAKE_COMMAND} -E touch ${STAMP_DIR}/${name}-mkdir COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp COMMENT "Clobbering bootstrap build and stamp directories" ) add_custom_target(${name}-clobber DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp) if(ARG_EXCLUDE_FROM_ALL) set(exclude ${cmake_3_1_EXCLUDE_FROM_ALL}) endif() ExternalProject_Add(${name} DEPENDS ${ARG_DEPENDS} ${name}-clobber PREFIX ${CMAKE_BINARY_DIR}/projects/${name} SOURCE_DIR ${source_dir} STAMP_DIR ${STAMP_DIR} BINARY_DIR ${BINARY_DIR} ${exclude} CMAKE_ARGS ${${nameCanon}_CMAKE_ARGS} ${compiler_args} -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} ${ARG_CMAKE_ARGS} ${PASSTHROUGH_VARIABLES} INSTALL_COMMAND "" STEP_TARGETS configure build ${cmake_3_4_USES_TERMINAL_OPTIONS} ) if(ARG_USE_TOOLCHAIN) ExternalProject_Add_Step(${name} force-rebuild COMMENT "Forcing rebuild becaues tools have changed" DEPENDERS configure DEPENDS ${TOOLCHAIN_BINS} ${cmake_3_4_USES_TERMINAL} ) endif() if(ARG_USE_TOOLCHAIN) set(force_deps DEPENDS ${TOOLCHAIN_BINS}) endif() llvm_ExternalProject_BuildCmd(run_clean clean) ExternalProject_Add_Step(${name} clean COMMAND ${run_clean} COMMENT "Cleaning ${name}..." DEPENDEES configure ${force_deps} WORKING_DIRECTORY ${BINARY_DIR} ${cmake_3_4_USES_TERMINAL} ) ExternalProject_Add_StepTargets(${name} clean) if(ARG_USE_TOOLCHAIN) add_dependencies(${name}-clean ${name}-clobber) set_target_properties(${name}-clean PROPERTIES SOURCES ${CMAKE_CURRENT_BINARY_DIR}/${name}-clobber-stamp) endif() if(NOT ARG_NO_INSTALL) install(CODE "execute_process\(COMMAND \${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=\${CMAKE_INSTALL_PREFIX} -P ${BINARY_DIR}/cmake_install.cmake \)" COMPONENT ${name}) add_custom_target(install-${name} DEPENDS ${name} COMMAND "${CMAKE_COMMAND}" -DCMAKE_INSTALL_COMPONENT=${name} -P "${CMAKE_BINARY_DIR}/cmake_install.cmake" ${cmake_3_2_USES_TERMINAL}) endif() # Add top-level targets foreach(target ${ARG_EXTRA_TARGETS}) llvm_ExternalProject_BuildCmd(build_runtime_cmd ${target}) add_custom_target(${target} COMMAND ${build_runtime_cmd} DEPENDS ${name}-configure WORKING_DIRECTORY ${BINARY_DIR} VERBATIM ${cmake_3_2_USES_TERMINAL}) endforeach() endfunction()