Allow inclusion of tunnel CMake project in a global CMake project.

CMakeLists.txt

@@ -89,7 +89,11 @@ if(ENABLE_TLS)
 	endif()
 endif()
 if(ENABLE_TUNNEL)
-	find_package(Tunnel)
+	if(LINPHONE_BUILDER_GROUP_EXTERNAL_SOURCE_PATH_BUILDERS)
+		include("${EP_tunnel_CONFIG_DIR}/TunnelConfig.cmake")
+	else()
+		find_package(Tunnel)
+	endif()
 	if(TUNNEL_FOUND)
 		set(HAVE_TUNNEL 1)
 	else()

cmake/BelleSIPConfig.cmake.in

@@ -33,7 +33,11 @@ if(NOT LINPHONE_BUILDER_GROUP_EXTERNAL_SOURCE_PATH_BUILDERS)
 endif()
 
 if(@ENABLE_TUNNEL@)
-	find_package(Tunnel)
+	if(LINPHONE_BUILDER_GROUP_EXTERNAL_SOURCE_PATH_BUILDERS)
+		include("${EP_tunnel_CONFIG_DIR}/TunnelConfig.cmake")
+	else()
+		find_package(Tunnel)
+	endif()
 endif()
 
 get_filename_component(BELLESIP_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)