1set(LLVM_LINK_COMPONENTS support) 2 3set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in) 4set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc) 5 6# Add the llvm-config tool. 7add_llvm_tool(llvm-config 8 llvm-config.cpp 9 ) 10 11# Compute the substitution values for various items. 12get_property(SUPPORT_SYSTEM_LIBS TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS) 13get_property(WINDOWSMANIFEST_SYSTEM_LIBS TARGET LLVMWindowsManifest PROPERTY LLVM_SYSTEM_LIBS) 14foreach(l ${SUPPORT_SYSTEM_LIBS} ${WINDOWSMANIFEST_SYSTEM_LIBS}) 15 if(MSVC) 16 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}.lib") 17 else() 18 if (l MATCHES "^-") 19 # If it's an option, pass it without changes. 20 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}") 21 else() 22 # Otherwise assume it's a library name we need to link with. 23 if(IS_ABSOLUTE ${l}) 24 set(SYSTEM_LIBS ${SYSTEM_LIBS} "${l}") 25 else() 26 set(SYSTEM_LIBS ${SYSTEM_LIBS} "-l${l}") 27 endif() 28 endif() 29 endif() 30endforeach() 31string(REPLACE ";" " " SYSTEM_LIBS "${SYSTEM_LIBS}") 32 33# Fetch target specific compile options, e.g. RTTI option 34get_property(COMPILE_FLAGS TARGET llvm-config PROPERTY COMPILE_FLAGS) 35 36# NOTE: We don't want to start extracting any random C/CXX flags that the 37# user may add that could affect the ABI. We only want to extract flags 38# that have been added by the LLVM build system. 39string(REGEX MATCH "-stdlib=[^ ]+" LLVM_CXX_STDLIB_FLAG ${CMAKE_CXX_FLAGS}) 40string(REGEX MATCH "-std=[^ ]+" LLVM_C_STD_FLAG ${CMAKE_C_FLAGS}) 41 42# Use configure_file to create BuildVariables.inc. 43set(LLVM_SRC_ROOT ${LLVM_MAIN_SRC_DIR}) 44set(LLVM_OBJ_ROOT ${LLVM_BINARY_DIR}) 45set(LLVM_CPPFLAGS "${LLVM_DEFINITIONS}") 46set(LLVM_CFLAGS "${LLVM_C_STD_FLAG} ${LLVM_DEFINITIONS}") 47# The language standard potentially affects the ABI/API of LLVM, so we want 48# to make sure it is reported by llvm-config. 49set(LLVM_CXXFLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION} ${LLVM_CXX_STDLIB_FLAG} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}") 50set(LLVM_BUILD_SYSTEM cmake) 51set(LLVM_HAS_RTTI ${LLVM_CONFIG_HAS_RTTI}) 52set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX}") 53 54# Use the C++ link flags, since they should be a superset of C link flags. 55set(LLVM_LDFLAGS "${CMAKE_CXX_LINK_FLAGS}") 56set(LLVM_BUILDMODE ${CMAKE_BUILD_TYPE}) 57set(LLVM_SYSTEM_LIBS ${SYSTEM_LIBS}) 58string(REPLACE ";" " " LLVM_TARGETS_BUILT "${LLVM_TARGETS_TO_BUILD}") 59llvm_canonicalize_cmake_booleans( 60 LLVM_BUILD_LLVM_DYLIB 61 LLVM_LINK_LLVM_DYLIB 62 LLVM_HAS_RTTI 63 BUILD_SHARED_LIBS) 64llvm_expand_pseudo_components(LLVM_DYLIB_COMPONENTS_expanded "${LLVM_DYLIB_COMPONENTS}") 65configure_file(${BUILDVARIABLES_SRCPATH} ${BUILDVARIABLES_OBJPATH} @ONLY) 66 67# Set build-time environment(s). 68add_definitions(-DCMAKE_CFG_INTDIR="${CMAKE_CFG_INTDIR}") 69 70if(LLVM_ENABLE_MODULES) 71 target_compile_options(llvm-config PUBLIC 72 "-fmodules-ignore-macro=CMAKE_CFG_INTDIR" 73 ) 74endif() 75 76# Add the dependency on the generation step. 77add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH}) 78 79if(CMAKE_CROSSCOMPILING AND NOT LLVM_CONFIG_PATH) 80 build_native_tool(llvm-config LLVM_CONFIG_PATH) 81 set(LLVM_CONFIG_PATH "${LLVM_CONFIG_PATH}" CACHE STRING "") 82 83 add_custom_target(NativeLLVMConfig DEPENDS ${LLVM_CONFIG_PATH}) 84 add_dependencies(llvm-config NativeLLVMConfig) 85endif() 86