forked from OSchip/llvm-project
[CMake] Split the target side of runtimes build
Previously, llvm/runtimes/CMakeLists.txt played two different roles: 1. host side which could used to set up the build of runtimes for different targets in the right order; 2. target side to build the runtimes for the specified target. This change splits llvm/runtimes/CMakeLists.txt and moves the target side to runtimes/CMakeLists laying down the foundation for the "A vision for building the runtimes" proposal. From the user perspective, there shouldn't be any visible difference at the moment. Differential Revision: https://reviews.llvm.org/D93408
This commit is contained in:
Petr Hosek
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# This file handles building LLVM runtime sub-projects.
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cmake_minimum_required(VERSION 3.13.4)
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project(Runtimes C CXX ASM)
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set(LLVM_ALL_RUNTIMES "compiler-rt;libcxx;libcxxabi;libunwind;openmp")
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set(LLVM_ENABLE_RUNTIMES "" CACHE STRING
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"Semicolon-separated list of runtimes to build (${LLVM_ALL_RUNTIMES}), or \"all\".")
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if(LLVM_ENABLE_RUNTIMES STREQUAL "all" )
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set(LLVM_ENABLE_RUNTIMES ${LLVM_ALL_RUNTIMES})
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endif()
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foreach(proj ${LLVM_ENABLE_RUNTIMES})
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set(proj_dir "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
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if(IS_DIRECTORY ${proj_dir} AND EXISTS ${proj_dir}/CMakeLists.txt)
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list(APPEND runtimes ${proj_dir})
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else()
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message(FATAL_ERROR "LLVM_ENABLE_RUNTIMES requests ${proj} but directory not found: ${proj_dir}")
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endif()
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string(TOUPPER "${proj}" canon_name)
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STRING(REGEX REPLACE "-" "_" canon_name ${canon_name})
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set(LLVM_EXTERNAL_${canon_name}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
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endforeach()
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function(runtime_register_component name)
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set_property(GLOBAL APPEND PROPERTY SUB_COMPONENTS ${name})
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endfunction()
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find_package(LLVM PATHS "${LLVM_BINARY_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
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find_package(Clang PATHS "${LLVM_BINARY_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
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# Add path for custom and the LLVM build's modules to the CMake module path.
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list(INSERT CMAKE_MODULE_PATH 0
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules"
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"${CMAKE_CURRENT_SOURCE_DIR}/../llvm/cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/../llvm/cmake/modules"
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)
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function(get_compiler_rt_path path)
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foreach(entry ${runtimes})
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get_filename_component(projName ${entry} NAME)
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if("${projName}" MATCHES "compiler-rt")
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set(${path} ${entry} PARENT_SCOPE)
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return()
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endif()
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endforeach()
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endfunction()
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# Some of the runtimes will conditionally use the compiler-rt sanitizers
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# to make this work smoothly we ensure that compiler-rt is added first in
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# the list of sub-projects. This allows other sub-projects to have checks
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# like `if(TARGET asan)` to enable building with asan.
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get_compiler_rt_path(compiler_rt_path)
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if(compiler_rt_path)
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list(REMOVE_ITEM runtimes ${compiler_rt_path})
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if(NOT DEFINED LLVM_BUILD_COMPILER_RT OR LLVM_BUILD_COMPILER_RT)
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list(INSERT runtimes 0 ${compiler_rt_path})
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endif()
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endif()
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# Setting these variables will allow the sub-build to put their outputs into
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# the library and bin directories of the top-level build.
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set(LLVM_LIBRARY_OUTPUT_INTDIR ${LLVM_LIBRARY_DIR})
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set(LLVM_RUNTIME_OUTPUT_INTDIR ${LLVM_TOOLS_BINARY_DIR})
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# This variable makes sure that e.g. llvm-lit is found.
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set(LLVM_MAIN_SRC_DIR ${LLVM_BUILD_MAIN_SRC_DIR})
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set(LLVM_CMAKE_PATH ${LLVM_MAIN_SRC_DIR}/cmake/modules)
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# This variable is used by individual runtimes to locate LLVM files.
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set(LLVM_PATH ${LLVM_BUILD_MAIN_SRC_DIR})
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if(APPLE)
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set(LLVM_ENABLE_LIBCXX ON CACHE BOOL "")
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endif()
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include(CheckLibraryExists)
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include(CheckCCompilerFlag)
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# We don't have libc++ (yet)...
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nostdinc++ -nostdlib++")
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# ...but we need access to libc++ headers for CMake checks to succeed.
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if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR AND "libcxx" IN_LIST LLVM_ENABLE_RUNTIMES)
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -isystem ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}/include")
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endif()
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# Avoid checking whether the compiler is working.
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set(LLVM_COMPILER_CHECKED ON)
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# Handle common options used by all runtimes.
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include(AddLLVM)
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include(HandleLLVMOptions)
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include(FindPythonInterp)
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# Remove the -nostdlib++ option we've added earlier.
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string(REPLACE "-nostdlib++" "" CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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# Use libtool instead of ar if you are both on an Apple host, and targeting Apple.
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if(CMAKE_HOST_APPLE AND APPLE)
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include(UseLibtool)
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endif()
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# This can be used to detect whether we're in the runtimes build.
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set(RUNTIMES_BUILD ON)
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foreach(entry ${runtimes})
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get_filename_component(projName ${entry} NAME)
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# TODO: Clean this up as part of an interface standardization
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string(REPLACE "-" "_" canon_name ${projName})
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string(TOUPPER ${canon_name} canon_name)
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# The subdirectories need to treat this as standalone builds. D57992 tried
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# to get rid of this, but the runtimes treat *_STANDALONE_BUILD=OFF as if
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# llvm & clang are configured in the same CMake, and setup dependencies
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# against their targets. OpenMP has fixed the issue so we don't set the
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# variable.
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if (NOT ${canon_name} STREQUAL "OPENMP")
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set(${canon_name}_STANDALONE_BUILD ON)
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endif()
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if(LLVM_RUNTIMES_LIBDIR_SUBDIR)
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set(${canon_name}_LIBDIR_SUBDIR "${LLVM_RUNTIMES_LIBDIR_SUBDIR}" CACHE STRING "" FORCE)
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endif()
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# Setting a variable to let sub-projects detect which other projects
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# will be included under here.
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set(HAVE_${canon_name} ON)
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endforeach()
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# We do this in two loops so that HAVE_* is set for each runtime before the
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# other runtimes are added.
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foreach(entry ${runtimes})
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get_filename_component(projName ${entry} NAME)
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# Between each sub-project we want to cache and clear the LIT properties
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set_property(GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
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set_property(GLOBAL PROPERTY LLVM_LIT_PARAMS)
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set_property(GLOBAL PROPERTY LLVM_LIT_DEPENDS)
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set_property(GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
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add_subdirectory(${entry} ${projName})
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get_property(LLVM_LIT_TESTSUITES GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
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get_property(LLVM_LIT_PARAMS GLOBAL PROPERTY LLVM_LIT_PARAMS)
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get_property(LLVM_LIT_DEPENDS GLOBAL PROPERTY LLVM_LIT_DEPENDS)
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get_property(LLVM_LIT_EXTRA_ARGS GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
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list(APPEND RUNTIMES_LIT_TESTSUITES ${LLVM_LIT_TESTSUITES})
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list(APPEND RUNTIMES_LIT_PARAMS ${LLVM_LIT_PARAMS})
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list(APPEND RUNTIMES_LIT_DEPENDS ${LLVM_LIT_DEPENDS})
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list(APPEND RUNTIMES_LIT_EXTRA_ARGS ${LLVM_LIT_EXTRA_ARGS})
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endforeach()
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if(LLVM_INCLUDE_TESTS)
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# Add a global check rule now that all subdirectories have been traversed
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# and we know the total set of lit testsuites.
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add_lit_target(check-runtimes
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"Running all regression tests"
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${RUNTIMES_LIT_TESTSUITES}
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PARAMS ${RUNTIMES_LIT_PARAMS}
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DEPENDS ${RUNTIMES_LIT_DEPENDS}
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ARGS ${RUNTIMES_LIT_EXTRA_ARGS}
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)
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add_custom_target(runtimes-test-depends DEPENDS ${RUNTIMES_LIT_DEPENDS})
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endif()
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get_property(SUB_COMPONENTS GLOBAL PROPERTY SUB_COMPONENTS)
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if(SUB_COMPONENTS)
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list(REMOVE_DUPLICATES SUB_COMPONENTS)
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foreach(component ${SUB_COMPONENTS})
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if(NOT TARGET ${component})
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message(SEND_ERROR "Missing target for runtime component ${component}!")
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continue()
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endif()
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if(TARGET check-${component})
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list(APPEND SUB_CHECK_TARGETS check-${component})
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endif()
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if(TARGET install-${component})
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list(APPEND SUB_INSTALL_TARGETS install-${component})
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endif()
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if(TARGET install-${component}-stripped)
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list(APPEND SUB_INSTALL_TARGETS install-${component}-stripped)
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endif()
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endforeach()
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if(LLVM_RUNTIMES_TARGET)
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configure_file(
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${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
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${LLVM_BINARY_DIR}/runtimes/${LLVM_RUNTIMES_TARGET}/Components.cmake)
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else()
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configure_file(
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${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
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${LLVM_BINARY_DIR}/runtimes/Components.cmake)
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endif()
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endif()
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