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1set(LLVM_LINK_COMPONENTS2 Support3 TargetParser4 )5 6set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)7set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)8 9# Add the llvm-config tool.10add_llvm_tool(llvm-config11 llvm-config.cpp12 # This utility doesn't use much of LLVM, so linking a shared library for the13 # entire thing is overkill. Avoiding that especially saves on build time when cross14 # compiling LLVM and building both cross and native `llvm-config`s. We don't15 # want to build an entire native libLLVM.so in addition to the cross one just16 # for the native `llvm-config`!17 DISABLE_LLVM_LINK_LLVM_DYLIB18 )19 20# Compute the substitution values for various items.21get_property(SUPPORT_SYSTEM_LIBS TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)22get_property(WINDOWSMANIFEST_SYSTEM_LIBS TARGET LLVMWindowsManifest PROPERTY LLVM_SYSTEM_LIBS)23 24foreach(l ${SUPPORT_SYSTEM_LIBS} ${WINDOWSMANIFEST_SYSTEM_LIBS})25 if(MSVC)26 if(IS_ABSOLUTE ${l})27 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}")28 else()29 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}.lib")30 endif()31 else()32 if (l MATCHES "^-")33 # If it's an option, pass it without changes.34 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}")35 else()36 # Otherwise assume it's a library name we need to link with.37 if(IS_ABSOLUTE ${l})38 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}")39 else()40 set(SYSTEM_LIBS ${SYSTEM_LIBS} "-l${l}")41 endif()42 endif()43 endif()44endforeach()45 46string(REPLACE ";" " " SYSTEM_LIBS "${SYSTEM_LIBS}")47 48# Fetch target specific compile options, e.g. RTTI option49get_property(COMPILE_FLAGS TARGET llvm-config PROPERTY COMPILE_FLAGS)50 51# NOTE: We don't want to start extracting any random C/CXX flags that the52# user may add that could affect the ABI. We only want to extract flags53# that have been added by the LLVM build system.54string(REGEX MATCH "-stdlib=[^ ]+" LLVM_CXX_STDLIB_FLAG ${CMAKE_CXX_FLAGS})55string(REGEX MATCH "-std=[^ ]+" LLVM_C_STD_FLAG ${CMAKE_C_FLAGS})56 57# Use configure_file to create BuildVariables.inc.58set(LLVM_SRC_ROOT ${LLVM_MAIN_SRC_DIR})59set(LLVM_OBJ_ROOT ${LLVM_BINARY_DIR})60set(LLVM_CPPFLAGS "${LLVM_DEFINITIONS}")61set(LLVM_CFLAGS "${LLVM_C_STD_FLAG} ${LLVM_DEFINITIONS}")62# The language standard potentially affects the ABI/API of LLVM, so we want63# to make sure it is reported by llvm-config.64set(LLVM_CXXFLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION} ${LLVM_CXX_STDLIB_FLAG} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")65set(LLVM_BUILD_SYSTEM cmake)66set(LLVM_HAS_RTTI ${LLVM_CONFIG_HAS_RTTI})67set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX}")68set(LLVM_SHARED_LIBRARY_PREFIX "${CMAKE_SHARED_LIBRARY_PREFIX}")69 70# Use the C++ link flags, since they should be a superset of C link flags.71set(LLVM_LDFLAGS "${CMAKE_CXX_LINK_FLAGS}")72set(LLVM_BUILDMODE ${CMAKE_BUILD_TYPE})73set(LLVM_SYSTEM_LIBS ${SYSTEM_LIBS})74string(REPLACE ";" " " LLVM_TARGETS_BUILT "${LLVM_TARGETS_TO_BUILD}")75llvm_canonicalize_cmake_booleans(76 LLVM_BUILD_LLVM_DYLIB77 LLVM_LINK_LLVM_DYLIB78 LLVM_HAS_RTTI79 BUILD_SHARED_LIBS)80llvm_expand_pseudo_components(LLVM_DYLIB_COMPONENTS_expanded "${LLVM_DYLIB_COMPONENTS}")81configure_file(${BUILDVARIABLES_SRCPATH} ${BUILDVARIABLES_OBJPATH} @ONLY)82 83# Set build-time environment(s).84add_compile_definitions(CMAKE_CFG_INTDIR="$<CONFIG>")85 86if(LLVM_ENABLE_MODULES)87 target_compile_options(llvm-config PUBLIC88 "-fmodules-ignore-macro=CMAKE_CFG_INTDIR"89 )90endif()91 92# Add the dependency on the generation step.93set_property(SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp94 APPEND PROPERTY OBJECT_DEPENDS ${BUILDVARIABLES_OBJPATH}95)96 97if(CMAKE_CROSSCOMPILING)98 if (LLVM_NATIVE_TOOL_DIR AND NOT LLVM_CONFIG_PATH)99 if (EXISTS "${LLVM_NATIVE_TOOL_DIR}/llvm-config${LLVM_HOST_EXECUTABLE_SUFFIX}")100 set(LLVM_CONFIG_PATH "${LLVM_NATIVE_TOOL_DIR}/llvm-config${LLVM_HOST_EXECUTABLE_SUFFIX}")101 endif()102 endif()103 104 if (NOT LLVM_CONFIG_PATH)105 build_native_tool(llvm-config LLVM_CONFIG_PATH)106 set(LLVM_CONFIG_PATH "${LLVM_CONFIG_PATH}" CACHE STRING "")107 108 add_custom_target(NativeLLVMConfig DEPENDS ${LLVM_CONFIG_PATH})109 add_dependencies(llvm-config NativeLLVMConfig)110 endif()111endif()112