use lld-link

Author: 16bit-ykiko

cmake/toolchain.cmake

@@ -5,6 +5,11 @@ if(WIN32)
     set(CMAKE_CXX_COMPILER clang-cl CACHE STRING "C++ compiler")
     set(AR_PROGRAM_NAME "llvm-lib")
     set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreadedDLL" CACHE STRING "MSVC runtime")
+
+    find_program(LLVM_LLD_LINK_PATH "lld-link")
+    if(LLVM_LLD_LINK_PATH)
+        set(CMAKE_LINKER "${LLVM_LLD_LINK_PATH}" CACHE FILEPATH "Linker")
+    endif()
 else()
     set(CMAKE_C_COMPILER clang CACHE STRING "C compiler")
     set(CMAKE_CXX_COMPILER clang++ CACHE STRING "C++ compiler")