cmake: fix `ENABLE_UNIX_SOCKETS=OFF` with pre-fill enabled on unix

Cherry-picked from #17988

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d2bfd2f6f8373110c96835169a34bf5501cf5aee..530f54e2713d78b27787f6f34569c41b0c351da3 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1502,6 +1502,7 @@ if(ENABLE_UNIX_SOCKETS AND NOT WINCE)
     check_struct_has_member("struct sockaddr_un" "sun_path" "sys/un.h" USE_UNIX_SOCKETS)
   endif()
 else()
+  set(USE_UNIX_SOCKETS 0)
   unset(USE_UNIX_SOCKETS CACHE)
 endif()