1set(LLVM_LINK_COMPONENTS 2 Support 3 TargetParser 4 ) 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-config 11 llvm-config.cpp 12 # This utility doesn't use much of LLVM, so linking a shared library for the 13 # entire thing is overkill. Avoiding that especially saves on build time when cross 14 # compiling LLVM and building both cross and native `llvm-config`s. We don't 15 # want to build an entire native libLLVM.so in addition to the cross one just 16 # for the native `llvm-config`! 17 DISABLE_LLVM_LINK_LLVM_DYLIB 18 ) 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 option 49get_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 the 52# user may add that could affect the ABI. We only want to extract flags 53# 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} ${LLVM_DEFINITIONS}") 62# The language standard potentially affects the ABI/API of LLVM, so we want 63# to make sure it is reported by llvm-config. 64set(LLVM_CXXFLAGS "${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}${LLVM_VERSION_SUFFIX}") 68 69# Use the C++ link flags, since they should be a superset of C link flags. 70set(LLVM_LDFLAGS "${CMAKE_CXX_LINK_FLAGS}") 71set(LLVM_BUILDMODE ${CMAKE_BUILD_TYPE}) 72set(LLVM_SYSTEM_LIBS ${SYSTEM_LIBS}) 73string(REPLACE ";" " " LLVM_TARGETS_BUILT "${LLVM_TARGETS_TO_BUILD}") 74llvm_canonicalize_cmake_booleans( 75 LLVM_BUILD_LLVM_DYLIB 76 LLVM_LINK_LLVM_DYLIB 77 LLVM_HAS_RTTI 78 BUILD_SHARED_LIBS) 79llvm_expand_pseudo_components(LLVM_DYLIB_COMPONENTS_expanded "${LLVM_DYLIB_COMPONENTS}") 80configure_file(${BUILDVARIABLES_SRCPATH} ${BUILDVARIABLES_OBJPATH} @ONLY) 81 82# Set build-time environment(s). 83add_compile_definitions(CMAKE_CFG_INTDIR="$<CONFIG>") 84 85if(LLVM_ENABLE_MODULES) 86 target_compile_options(llvm-config PUBLIC 87 "-fmodules-ignore-macro=CMAKE_CFG_INTDIR" 88 ) 89endif() 90 91# Add the dependency on the generation step. 92set_property(SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp 93 APPEND PROPERTY OBJECT_DEPENDS ${BUILDVARIABLES_OBJPATH} 94) 95 96if(CMAKE_CROSSCOMPILING) 97 if (LLVM_NATIVE_TOOL_DIR AND NOT LLVM_CONFIG_PATH) 98 if (EXISTS "${LLVM_NATIVE_TOOL_DIR}/llvm-config${LLVM_HOST_EXECUTABLE_SUFFIX}") 99 set(LLVM_CONFIG_PATH "${LLVM_NATIVE_TOOL_DIR}/llvm-config${LLVM_HOST_EXECUTABLE_SUFFIX}") 100 endif() 101 endif() 102 103 if (NOT LLVM_CONFIG_PATH) 104 build_native_tool(llvm-config LLVM_CONFIG_PATH) 105 set(LLVM_CONFIG_PATH "${LLVM_CONFIG_PATH}" CACHE STRING "") 106 107 add_custom_target(NativeLLVMConfig DEPENDS ${LLVM_CONFIG_PATH}) 108 add_dependencies(llvm-config NativeLLVMConfig) 109 endif() 110endif() 111