Define BELLESIP_LDFLAGS as a string in CMake.

CMakeLists.txt

@@ -206,6 +206,7 @@ if(APPLE)
 		list(APPEND LINK_FLAGS "-framework CoreFoundation" "-framework CFNetwork" "-framework UIKit")
 	endif()
 endif()
+string(REPLACE ";" " " LINK_FLAGS_STR "${LINK_FLAGS}")
 if(WIN32)
 	add_definitions(
 		-DBELLESIP_EXPORTS

cmake/BelleSIPConfig.cmake.in

@@ -47,7 +47,7 @@ else()
 	set(BELLESIP_INCLUDE_DIRS "${BELLESIP_CMAKE_DIR}/../../../include")
 endif()
 set(BELLESIP_LIBRARIES bellesip)
-set(BELLESIP_LDFLAGS @LINK_FLAGS@)
+set(BELLESIP_LDFLAGS "@LINK_FLAGS_STR@")
 if(TUNNEL_FOUND)
 	list(APPEND BELLESIP_INCLUDE_DIRS ${TUNNEL_INCLUDE_DIRS})
 	list(APPEND BELLESIP_LIBRARIES ${TUNNEL_LIBRARIES})