Add support for clangarm64 (#2228)

Author: scribam

CMakeLists.txt

@@ -169,17 +169,18 @@ else()
         execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpmachine
             OUTPUT_VARIABLE UC_COMPILER_VERSION)
 
-        string(FIND "${UC_COMPILER_VERSION}" "i686" UC_RET)
-        if(${UC_RET} GREATER_EQUAL "0")
+        if(UC_COMPILER_VERSION MATCHES "^i686.*")
             set(UNICORN_TARGET_ARCH "i386")
             set(UNICORN_CFLAGS -m32 -static-libgcc) # Workaround for github action bugs
             set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m32")
             set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m32")
-        else()
+        elseif(UC_COMPILER_VERSION MATCHES "^x86_64.*")
             set(UNICORN_TARGET_ARCH "i386")
             set(UNICORN_CFLAGS -m64 -mcx16)
             set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -m64")
             set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -m64")
+        elseif(UC_COMPILER_VERSION MATCHES "^aarch64.*")
+            set(UNICORN_TARGET_ARCH "aarch64")
         endif()
     elseif(ANDROID_ABI)
         string(FIND "${ANDROID_ABI}" "arm64" UC_RET)