Differential D93408 Diff 316001 runtimes/CMakeLists.txt

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runtimes/CMakeLists.txt

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				# This file handles building LLVM runtime sub-projects.
				cmake_minimum_required(VERSION 3.13.4)
				project(Runtimes C CXX ASM)

				set(LLVM_ALL_RUNTIMES "compiler-rt;libcxx;libcxxabi;libunwind;openmp")
				set(LLVM_ENABLE_RUNTIMES "" CACHE STRING
				"Semicolon-separated list of runtimes to build (${LLVM_ALL_RUNTIMES}), or \"all\".")
				if(LLVM_ENABLE_RUNTIMES STREQUAL "all" )
				set(LLVM_ENABLE_RUNTIMES ${LLVM_ALL_RUNTIMES})
				endif()

				foreach(proj ${LLVM_ENABLE_RUNTIMES})
				set(proj_dir "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
				if(IS_DIRECTORY ${proj_dir} AND EXISTS ${proj_dir}/CMakeLists.txt)
				list(APPEND runtimes ${proj_dir})
				else()
				message(FATAL_ERROR "LLVM_ENABLE_RUNTIMES requests ${proj} but directory not found: ${proj_dir}")
				endif()
				string(TOUPPER "${proj}" canon_name)
				STRING(REGEX REPLACE "-" "_" canon_name ${canon_name})
				set(LLVM_EXTERNAL_${canon_name}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
				endforeach()

				function(runtime_register_component name)
				set_property(GLOBAL APPEND PROPERTY SUB_COMPONENTS ${name})
				endfunction()

				find_package(LLVM PATHS "${LLVM_BINARY_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
				find_package(Clang PATHS "${LLVM_BINARY_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)

				# Add path for custom and the LLVM build's modules to the CMake module path.
				list(INSERT CMAKE_MODULE_PATH 0
				"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
				"${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules"
				"${CMAKE_CURRENT_SOURCE_DIR}/../llvm/cmake"
				"${CMAKE_CURRENT_SOURCE_DIR}/../llvm/cmake/modules"
				)

				function(get_compiler_rt_path path)
				foreach(entry ${runtimes})
				get_filename_component(projName ${entry} NAME)
				if("${projName}" MATCHES "compiler-rt")
				set(${path} ${entry} PARENT_SCOPE)
				return()
				endif()
				endforeach()
				endfunction()

				# Some of the runtimes will conditionally use the compiler-rt sanitizers
				# to make this work smoothly we ensure that compiler-rt is added first in
				# the list of sub-projects. This allows other sub-projects to have checks
				# like `if(TARGET asan)` to enable building with asan.
				get_compiler_rt_path(compiler_rt_path)
				if(compiler_rt_path)
				list(REMOVE_ITEM runtimes ${compiler_rt_path})
				if(NOT DEFINED LLVM_BUILD_COMPILER_RT OR LLVM_BUILD_COMPILER_RT)
				list(INSERT runtimes 0 ${compiler_rt_path})
				endif()
				endif()

				# Setting these variables will allow the sub-build to put their outputs into
				# the library and bin directories of the top-level build.
				set(LLVM_LIBRARY_OUTPUT_INTDIR ${LLVM_LIBRARY_DIR})
				set(LLVM_RUNTIME_OUTPUT_INTDIR ${LLVM_TOOLS_BINARY_DIR})

				# This variable makes sure that e.g. llvm-lit is found.
				set(LLVM_MAIN_SRC_DIR ${LLVM_BUILD_MAIN_SRC_DIR})
				set(LLVM_CMAKE_PATH ${LLVM_MAIN_SRC_DIR}/cmake/modules)

				# This variable is used by individual runtimes to locate LLVM files.
				set(LLVM_PATH ${LLVM_BUILD_MAIN_SRC_DIR})

				if(APPLE)
				set(LLVM_ENABLE_LIBCXX ON CACHE BOOL "")
				endif()

				include(CheckLibraryExists)
				include(CheckCCompilerFlag)

				# We don't have libc++ (yet)...
				set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nostdinc++ -nostdlib++")

				# ...but we need access to libc++ headers for CMake checks to succeed.
				if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR AND "libcxx" IN_LIST LLVM_ENABLE_RUNTIMES)
				set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -isystem ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}/include")
				endif()

				# Avoid checking whether the compiler is working.
				set(LLVM_COMPILER_CHECKED ON)

				# Handle common options used by all runtimes.
				include(AddLLVM)
				include(HandleLLVMOptions)
				include(FindPythonInterp)

				# Remove the -nostdlib++ option we've added earlier.
				string(REPLACE "-nostdlib++" "" CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")

				# Use libtool instead of ar if you are both on an Apple host, and targeting Apple.
				if(CMAKE_HOST_APPLE AND APPLE)
				include(UseLibtool)
				endif()

				# This can be used to detect whether we're in the runtimes build.
				set(RUNTIMES_BUILD ON)

				foreach(entry ${runtimes})
				get_filename_component(projName ${entry} NAME)

				# TODO: Clean this up as part of an interface standardization
				string(REPLACE "-" "_" canon_name ${projName})
				string(TOUPPER ${canon_name} canon_name)

				# The subdirectories need to treat this as standalone builds. D57992 tried
				# to get rid of this, but the runtimes treat *_STANDALONE_BUILD=OFF as if
				# llvm & clang are configured in the same CMake, and setup dependencies
				# against their targets. OpenMP has fixed the issue so we don't set the
				# variable.
				if (NOT ${canon_name} STREQUAL "OPENMP")
				set(${canon_name}_STANDALONE_BUILD ON)
				endif()

				if(LLVM_RUNTIMES_LIBDIR_SUBDIR)
				set(${canon_name}_LIBDIR_SUBDIR "${LLVM_RUNTIMES_LIBDIR_SUBDIR}" CACHE STRING "" FORCE)
				endif()

				# Setting a variable to let sub-projects detect which other projects
				# will be included under here.
				set(HAVE_${canon_name} ON)
				endforeach()

				# We do this in two loops so that HAVE_* is set for each runtime before the
				# other runtimes are added.
				foreach(entry ${runtimes})
				get_filename_component(projName ${entry} NAME)

				# Between each sub-project we want to cache and clear the LIT properties
				set_property(GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
				set_property(GLOBAL PROPERTY LLVM_LIT_PARAMS)
				set_property(GLOBAL PROPERTY LLVM_LIT_DEPENDS)
				set_property(GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)

				add_subdirectory(${entry} ${projName})

				get_property(LLVM_LIT_TESTSUITES GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
				get_property(LLVM_LIT_PARAMS GLOBAL PROPERTY LLVM_LIT_PARAMS)
				get_property(LLVM_LIT_DEPENDS GLOBAL PROPERTY LLVM_LIT_DEPENDS)
				get_property(LLVM_LIT_EXTRA_ARGS GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)

				list(APPEND RUNTIMES_LIT_TESTSUITES ${LLVM_LIT_TESTSUITES})
				list(APPEND RUNTIMES_LIT_PARAMS ${LLVM_LIT_PARAMS})
				list(APPEND RUNTIMES_LIT_DEPENDS ${LLVM_LIT_DEPENDS})
				list(APPEND RUNTIMES_LIT_EXTRA_ARGS ${LLVM_LIT_EXTRA_ARGS})
				endforeach()

				if(LLVM_INCLUDE_TESTS)
				# Add a global check rule now that all subdirectories have been traversed
				# and we know the total set of lit testsuites.

				add_lit_target(check-runtimes
				"Running all regression tests"
				${RUNTIMES_LIT_TESTSUITES}
				PARAMS ${RUNTIMES_LIT_PARAMS}
				DEPENDS ${RUNTIMES_LIT_DEPENDS}
				ARGS ${RUNTIMES_LIT_EXTRA_ARGS}
				)
				add_custom_target(runtimes-test-depends DEPENDS ${RUNTIMES_LIT_DEPENDS})
				endif()

				get_property(SUB_COMPONENTS GLOBAL PROPERTY SUB_COMPONENTS)
				if(SUB_COMPONENTS)
				list(REMOVE_DUPLICATES SUB_COMPONENTS)
				foreach(component ${SUB_COMPONENTS})
				if(NOT TARGET ${component})
				message(SEND_ERROR "Missing target for runtime component ${component}!")
				continue()
				endif()

				if(TARGET check-${component})
				list(APPEND SUB_CHECK_TARGETS check-${component})
				endif()

				if(TARGET install-${component})
				list(APPEND SUB_INSTALL_TARGETS install-${component})
				endif()
				if(TARGET install-${component}-stripped)
				list(APPEND SUB_INSTALL_TARGETS install-${component}-stripped)
				endif()
				endforeach()

				if(LLVM_RUNTIMES_TARGET)
				configure_file(
				${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
				${LLVM_BINARY_DIR}/runtimes/${LLVM_RUNTIMES_TARGET}/Components.cmake)
				else()
				configure_file(
				${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
				${LLVM_BINARY_DIR}/runtimes/Components.cmake)
				endif()
				endif()