fix link for arm64

Author: mpromonet

CMakeLists.txt

@@ -222,8 +222,6 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
       add_compile_options(-isystem${WEBRTCROOT}/src/third_party/libc++/src/include)
     endif()
     add_compile_options(-isystem${WEBRTCROOT}/src/third_party/libc++abi/src/include)
-    find_library(LIBC++ NAMES c++ HINTS "${WEBRTCOBJS}/buildtools/third_party/libc++" NO_DEFAULT_PATH)
-    find_library(LIBC++ABI NAMES c++abi HINTS "${WEBRTCOBJS}/buildtools/third_party/libc++abi" NO_DEFAULT_PATH)
     add_compile_options(-Wno-nullability-completeness)
   endif()
 
@@ -255,13 +253,13 @@ SET (WEBRTCEXTRAOBJS ${WEBRTJSONCPPCOBJS} ${WEBRTP2POBJ} ${WEBRTCCOMOBJ})
 FILE(GLOB SOURCE src/*.cpp)
 add_executable (${CMAKE_PROJECT_NAME} ${SOURCE} ${WEBRTCEXTRAOBJS})
 target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE inc)
-if (LIBC++)
-  message(STATUS "Found libc++ library at ${LIBC++}")
-  target_link_libraries(${CMAKE_PROJECT_NAME} "${LIBC++}")
+if (EXISTS ${WEBRTCOBJS}/buildtools/third_party/libc++/${CMAKE_STATIC_LIBRARY_PREFIX}c++${CMAKE_STATIC_LIBRARY_SUFFIX})
+  message(STATUS "Found libc++ library at ${WEBRTCOBJS}/buildtools/third_party/libc++/${CMAKE_STATIC_LIBRARY_PREFIX}c++${CMAKE_STATIC_LIBRARY_SUFFIX}")
+  target_link_libraries(${CMAKE_PROJECT_NAME} "${WEBRTCOBJS}/buildtools/third_party/libc++/${CMAKE_STATIC_LIBRARY_PREFIX}c++${CMAKE_STATIC_LIBRARY_SUFFIX}")
 endif()
-if (LIBC++ABI)
-  message(STATUS "Found libc++abi library at ${LIBC++ABI}")
-  target_link_libraries(${CMAKE_PROJECT_NAME} "${LIBC++ABI}")
+if (EXISTS ${WEBRTCOBJS}/buildtools/third_party/libc++abi/${CMAKE_STATIC_LIBRARY_PREFIX}c++abi${CMAKE_STATIC_LIBRARY_SUFFIX})
+  message(STATUS "Found libc++abi library at ${WEBRTCOBJS}/buildtools/third_party/libc++abi/${CMAKE_STATIC_LIBRARY_PREFIX}c++abi${CMAKE_STATIC_LIBRARY_SUFFIX}")
+  target_link_libraries(${CMAKE_PROJECT_NAME} "${WEBRTCOBJS}/buildtools/third_party/libc++abi/${CMAKE_STATIC_LIBRARY_PREFIX}c++abi${CMAKE_STATIC_LIBRARY_SUFFIX}")
 endif()
 
 # cxxopts