+# Check if lld is built as a standalone project.
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+ project(lld)
+ cmake_minimum_required(VERSION 3.4.3)
+
+ set(CMAKE_INCLUDE_CURRENT_DIR ON)
+ set(LLD_BUILT_STANDALONE TRUE)
+
+ find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary")
+ if(NOT LLVM_CONFIG_PATH)
+ message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
+ endif()
+
+ execute_process(COMMAND "${LLVM_CONFIG_PATH}" "--obj-root" "--includedir"
+ RESULT_VARIABLE HAD_ERROR
+ OUTPUT_VARIABLE LLVM_CONFIG_OUTPUT
+ OUTPUT_STRIP_TRAILING_WHITESPACE)
+ if(HAD_ERROR)
+ message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
+ endif()
+
+ string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" LLVM_CONFIG_OUTPUT "${LLVM_CONFIG_OUTPUT}")
+
+ list(GET LLVM_CONFIG_OUTPUT 0 OBJ_ROOT)
+ list(GET LLVM_CONFIG_OUTPUT 1 MAIN_INCLUDE_DIR)
+
+ set(LLVM_OBJ_ROOT ${OBJ_ROOT} CACHE PATH "path to LLVM build tree")
+ set(LLVM_MAIN_INCLUDE_DIR ${MAIN_INCLUDE_DIR} CACHE PATH "path to llvm/include")
+
+ file(TO_CMAKE_PATH ${LLVM_OBJ_ROOT} LLVM_BINARY_DIR)
+ set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
+
+ if(NOT EXISTS "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
+ message(FATAL_ERROR "LLVMConfig.cmake not found")
+ endif()
+ include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
+
+ list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
+
+ set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
+ include_directories("${LLVM_BINARY_DIR}/include" ${LLVM_INCLUDE_DIRS})
+ link_directories(${LLVM_LIBRARY_DIRS})
+
+ set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
+ find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
+
+ include(AddLLVM)
+ include(TableGen)
+ include(HandleLLVMOptions)
+endif()
+
set(LLD_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(LLD_INCLUDE_DIR ${LLD_SOURCE_DIR}/include )
set(LLD_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})