fix target for macos

CMakeLists.txt

@@ -35,7 +35,6 @@ add_definitions(-DVERSION=\"${VERSION}\")
 # set CMAKE_FIND_ROOT_PATH to search package in WebRTC sysroot
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "armv.*")
   set (CMAKE_FIND_ROOT_PATH ${WEBRTCROOT}/src/build/linux/debian_bullseye_arm-sysroot)
-  add_compile_options(--sysroot=${CMAKE_FIND_ROOT_PATH})
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
   set (CMAKE_FIND_ROOT_PATH ${WEBRTCROOT}/src/build/linux/debian_bullseye_arm64-sysroot)
   add_compile_options(--sysroot=${CMAKE_FIND_ROOT_PATH})
@@ -252,7 +251,11 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     if(CMAKE_SYSTEM_PROCESSOR MATCHES "armv.*")
       add_definitions(-target arm-linux-gnueabihf)
     elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
-      add_definitions(-target aarch64-linux-gnu)
+      if (NOT APPLE)
+        add_definitions(-target aarch64-linux-gnu)
+      else ()
+        add_definitions(-target aarch64-apple-macos)
+      endif()  
     endif()
 endif()
 
@@ -276,15 +279,15 @@ if (CMAKE_SYSTEM_PROCESSOR MATCHES "armv6.*")
 endif()
 # static link of stdc++ if available
 if (NOT APPLE)
-include(CheckCXXCompilerFlag)
-CHECK_CXX_COMPILER_FLAG("-static-libgcc" CXX_SUPPORTS_STATIC_LIBGCC)
-if (CXX_SUPPORTS_STATIC_LIBGCC) 
-  target_link_libraries (${CMAKE_PROJECT_NAME} -static-libgcc)
-endif()    
-CHECK_CXX_COMPILER_FLAG("-static-libstdc++" CXX_SUPPORTS_STATIC_LIBSTDCPP)
-if (CXX_SUPPORTS_STATIC_LIBSTDCPP) 
-  target_link_libraries (${CMAKE_PROJECT_NAME} -static-libstdc++)
-endif()
+  include(CheckCXXCompilerFlag)
+  CHECK_CXX_COMPILER_FLAG("-static-libgcc" CXX_SUPPORTS_STATIC_LIBGCC)
+  if (CXX_SUPPORTS_STATIC_LIBGCC) 
+    target_link_libraries (${CMAKE_PROJECT_NAME} -static-libgcc)
+  endif()    
+  CHECK_CXX_COMPILER_FLAG("-static-libstdc++" CXX_SUPPORTS_STATIC_LIBSTDCPP)
+  if (CXX_SUPPORTS_STATIC_LIBSTDCPP) 
+    target_link_libraries (${CMAKE_PROJECT_NAME} -static-libstdc++)
+  endif()
 endif()
 
 #cpack