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All the existing runtimes relies on flags which are set by AddLLVM and HandleLLVMOptions. In the standalone case, they would include these themselves, but when being built using LLVM runtimes we should include these in the top-level runtimes CMake files. Differential Revision: https://reviews.llvm.org/D28389 llvm-svn: 291590
258 lines
11 KiB
CMake
258 lines
11 KiB
CMake
# This file handles building LLVM runtime sub-projects.
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# Runtimes are different from tools or other drop-in projects because runtimes
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# should be built with the LLVM toolchain from the build directory. This file is
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# a first step to formalizing runtime build interfaces.
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# In the current state this file only works with compiler-rt, other runtimes
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# will work as the runtime build interface standardizes.
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# Find all subdirectories containing CMake projects
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file(GLOB entries *)
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foreach(entry ${entries})
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if(IS_DIRECTORY ${entry} AND EXISTS ${entry}/CMakeLists.txt)
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list(APPEND runtimes ${entry})
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endif()
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endforeach()
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# If this file is acting as a top-level CMake invocation, this code path is
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# triggered by the external project call for the runtimes target below.
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if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
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function(runtime_register_component name)
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set_property(GLOBAL APPEND PROPERTY SUB_COMPONENTS ${name})
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endfunction()
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cmake_minimum_required(VERSION 3.4.3)
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# Add the root project's CMake modules, and the LLVM build's modules to the
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# CMake module path.
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list(INSERT CMAKE_MODULE_PATH 0
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"${CMAKE_CURRENT_SOURCE_DIR}/../cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/../cmake/Modules"
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"${LLVM_BINARY_DIR}/lib/cmake/llvm"
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)
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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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foreach(entry ${runtimes})
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if("${entry}" MATCHES "compiler-rt")
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set(compiler_rt_path ${entry})
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break()
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endif()
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endforeach()
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if(compiler_rt_path)
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list(REMOVE_ITEM runtimes ${compiler_rt_path})
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list(INSERT runtimes 0 ${compiler_rt_path})
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endif()
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# LLVMConfig.cmake contains a bunch of CMake variables from the LLVM build.
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# This file is installed as part of LLVM distributions, so this can be used
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# either from a build directory or an installed LLVM.
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include(LLVMConfig)
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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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# Handle common options used by all runtimes.
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include(AddLLVM)
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include(HandleLLVMOptions)
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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 ${canon_name} canon_name)
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# The subdirectories need to treat this as standalone builds
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set(${canon_name}_STANDALONE_BUILD On)
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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 ${entry} NAME)
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# Between each sub-project we want to cache and clear the LIT properties
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set_property(GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
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set_property(GLOBAL PROPERTY LLVM_LIT_PARAMS)
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set_property(GLOBAL PROPERTY LLVM_LIT_DEPENDS)
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set_property(GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
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add_subdirectory(${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 ${component}!")
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continue()
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endif()
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if(LLVM_INCLUDE_TESTS AND NOT TARGET check-${component})
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message(SEND_ERROR "Missing check target for runtime component ${component}!")
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continue()
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endif()
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if(TARGET install-${component})
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list(APPEND SUB_INSTALL_TARGETS install-${component})
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endif()
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endforeach()
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configure_file(
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${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
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${LLVM_BINARY_DIR}/runtimes/Components.cmake)
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endif()
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else() # if this is included from LLVM's CMake
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include(${LLVM_BINARY_DIR}/runtimes/Components.cmake OPTIONAL)
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set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${LLVM_BINARY_DIR}/runtimes/Components.cmake)
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include(LLVMExternalProjectUtils)
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# If compiler-rt is present we need to build the builtin libraries first. This
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# is required because the other runtimes need the builtin libraries present
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# before the just-built compiler can pass the configuration tests.
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if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/compiler-rt)
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if(APPLE OR NOT LLVM_BUILTIN_TARGETS)
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llvm_ExternalProject_Add(builtins
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${CMAKE_CURRENT_SOURCE_DIR}/compiler-rt/lib/builtins
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CMAKE_ARGS -DLLVM_LIBRARY_OUTPUT_INTDIR=${LLVM_LIBRARY_DIR}
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-DLLVM_RUNTIME_OUTPUT_INTDIR=${LLVM_TOOLS_BINARY_DIR}
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-DCMAKE_C_COMPILER_TARGET=${TARGET_TRIPLE}
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-DCMAKE_ASM_COMPILER_TARGET=${TARGET_TRIPLE}
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PASSTHROUGH_PREFIXES COMPILER_RT
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USE_TOOLCHAIN)
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else()
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get_cmake_property(variableNames VARIABLES)
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add_custom_target(builtins)
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foreach(target ${LLVM_BUILTIN_TARGETS})
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foreach(variableName ${variableNames})
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if(variableName MATCHES "^BUILTINS_${target}")
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string(REPLACE "BUILTINS_${target}_" "" new_name ${variableName})
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list(APPEND ${target}_extra_args "-D${new_name}=${${variableName}}")
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endif()
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endforeach()
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llvm_ExternalProject_Add(builtins-${target}
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${CMAKE_CURRENT_SOURCE_DIR}/compiler-rt/lib/builtins
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CMAKE_ARGS -DLLVM_LIBRARY_OUTPUT_INTDIR=${LLVM_LIBRARY_DIR}
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-DLLVM_RUNTIME_OUTPUT_INTDIR=${LLVM_TOOLS_BINARY_DIR}
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-DCMAKE_C_COMPILER_TARGET=${target}
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-DCMAKE_ASM_COMPILER_TARGET=${target}
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-DCMAKE_C_COMPILER_WORKS=On
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-DCMAKE_ASM_COMPILER_WORKS=On
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-DCOMPILER_RT_DEFAULT_TARGET_ONLY=On
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${${target}_extra_args}
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PASSTHROUGH_PREFIXES COMPILER_RT
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USE_TOOLCHAIN)
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add_dependencies(builtins builtins-${target})
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endforeach()
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endif()
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set(deps builtins)
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# We don't need to depend on the builtins if we're building instrumented
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# because the next stage will use the same compiler used to build this stage.
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if(NOT LLVM_BUILD_INSTRUMENTED AND CLANG_ENABLE_BOOTSTRAP)
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add_dependencies(clang-bootstrap-deps builtins)
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endif()
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endif()
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# We create a list the names of all the runtime projects in all uppercase and
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# with dashes turned to underscores. This gives us the CMake variable prefixes
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# for all variables that will apply to runtimes.
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foreach(entry ${runtimes})
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get_filename_component(projName ${entry} NAME)
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string(REPLACE "-" "_" canon_name ${projName})
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string(TOUPPER ${canon_name} canon_name)
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list(APPEND prefixes ${canon_name})
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string(FIND ${projName} "lib" LIB_IDX)
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if(LIB_IDX EQUAL 0)
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string(SUBSTRING ${projName} 3 -1 projName)
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endif()
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list(APPEND runtime_names ${projName})
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endforeach()
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if(runtimes)
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foreach(runtime_name ${runtime_names})
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list(APPEND extra_targets
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${runtime_name}
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install-${runtime_name}
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check-${runtime_name})
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endforeach()
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if(LLVM_INCLUDE_TESTS)
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set(test_targets runtimes-test-depends check-runtimes)
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foreach(component ${SUB_COMPONENTS})
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list(APPEND SUB_COMPONENT_CHECK_TARGETS check-${component})
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endforeach()
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endif()
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# Create a runtimes target that uses this file as its top-level CMake file.
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# The runtimes target is a configuration of all the runtime libraries
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# together in a single CMake invocaiton.
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llvm_ExternalProject_Add(runtimes
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${CMAKE_CURRENT_SOURCE_DIR}
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DEPENDS ${deps}
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# Builtins were built separately above
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CMAKE_ARGS -DCOMPILER_RT_BUILD_BUILTINS=Off
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-DLLVM_INCLUDE_TESTS=${LLVM_INCLUDE_TESTS}
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PASSTHROUGH_PREFIXES ${prefixes}
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EXTRA_TARGETS ${extra_targets}
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${test_targets}
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${SUB_COMPONENTS}
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${SUB_COMPONENT_CHECK_TARGETS}
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${SUB_INSTALL_TARGETS}
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USE_TOOLCHAIN)
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# TODO: This is a hack needed because the libcxx headers are copied into the
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# build directory during configuration. Without that step the clang in the
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# build directory cannot find the C++ headers in certain configurations.
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# I need to build a mechanism for runtime projects to provide CMake code
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# that executes at LLVM configuration time to handle this case.
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if(NOT LLVM_BUILD_INSTRUMENTED AND CLANG_ENABLE_BOOTSTRAP)
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add_dependencies(clang-bootstrap-deps runtimes-configure)
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endif()
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if(LLVM_INCLUDE_TESTS)
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set_property(GLOBAL APPEND PROPERTY LLVM_ADDITIONAL_TEST_DEPENDS runtimes-test-depends)
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set_property(GLOBAL APPEND PROPERTY LLVM_ADDITIONAL_TEST_TARGETS check-runtimes)
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endif()
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endif()
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endif()
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