option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
"Set to ON to force using an old, unsupported host toolchain." OFF)
+ option(CLANG_ENABLE_BOOTSTRAP "Generate the clang bootstrap target" OFF)
include(AddLLVM)
include(TableGen)
${CLANG_BINARY_DIR}/share/clang/cmake/ClangConfig.cmake
COPYONLY)
endif ()
+
+if (CLANG_ENABLE_BOOTSTRAP)
+ include(ExternalProject)
+
+ if(CMAKE_VERSION VERSION_LESS 3.3.20150708)
+ set(cmake_3_4_USES_TERMINAL_OPTIONS)
+ else()
+ set(cmake_3_4_USES_TERMINAL_OPTIONS
+ USES_TERMINAL_CONFIGURE 1
+ USES_TERMINAL_BUILD 1
+ USES_TERMINAL_INSTALL 1
+ )
+ endif()
+
+ set(STAMP_DIR ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-stamps/)
+ set(BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-bins/)
+
+ add_custom_target(bootstrap-clear
+ DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-cleared
+ )
+ add_custom_command(
+ OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-cleared
+ DEPENDS clang
+ COMMAND ${CMAKE_COMMAND} -E remove_directory ${BINARY_DIR}
+ COMMAND ${CMAKE_COMMAND} -E make_directory ${BINARY_DIR}
+ COMMAND ${CMAKE_COMMAND} -E remove_directory ${STAMP_DIR}
+ COMMAND ${CMAKE_COMMAND} -E make_directory ${STAMP_DIR}
+ COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-cleared
+ COMMENT "Clobberring bootstrap build and stamp directories"
+ )
+
+ ExternalProject_Add(bootstrap
+ DEPENDS clang
+ PREFIX bootstrap
+ SOURCE_DIR ${CMAKE_SOURCE_DIR}
+ STAMP_DIR ${STAMP_DIR}
+ BINARY_DIR ${BINARY_DIR}
+ CMAKE_ARGS
+ # We shouldn't need to set this here, but INSTALL_DIR doesn't
+ # seem to work, so instead I'm passing this through
+ -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
+ ${CLANG_BOOTSTRAP_CMAKE_ARGS}
+ -DCMAKE_CXX_COMPILER=${CMAKE_BINARY_DIR}/bin/clang++
+ -DCMAKE_C_COMPILER=${CMAKE_BINARY_DIR}/bin/clang
+ INSTALL_COMMAND ""
+ STEP_TARGETS configure build
+ ${cmake_3_4_USES_TERMINAL_OPTIONS}
+ )
+
+ # exclude really-install from main target
+ set_target_properties(bootstrap PROPERTIES _EP_really-install_EXCLUDE_FROM_MAIN On)
+ ExternalProject_Add_Step(bootstrap really-install
+ COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --target install
+ COMMENT "Performing install step for 'bootstrap'"
+ DEPENDEES build
+ )
+ ExternalProject_Add_StepTargets(bootstrap really-install)
+ add_custom_target(bootstrap-install DEPENDS bootstrap-really-install)
+
+
+ set(ADDITIONAL_TARGETS_TO_ADD check-llvm check-clang check-all)
+ foreach(target ${ADDITIONAL_TARGETS_TO_ADD})
+ # exclude from main target
+ set_target_properties(bootstrap PROPERTIES _EP_${target}_EXCLUDE_FROM_MAIN On)
+
+ ExternalProject_Add_Step(bootstrap ${target}
+ COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --target ${target}
+ COMMENT "Performing ${target} for 'bootstrap'"
+ DEPENDEES configure
+ )
+ ExternalProject_Add_StepTargets(bootstrap ${target})
+ endforeach()
+endif()