Hi Yang Zhang, > Hi, I'd like to use -Wold-style-cast for my own code, but when I use > such macros as <arpa/inet.h>'s INADDR_ANY (which is #defined as > `((in_addr_t) 0x00000000)`), I get warnings for that. Any way around > this? Thanks! I'd use this technique: #undef INADDR_ANY in_addr_t const INADDR_ANY = in_addr_t(0x00000000); Could put that in your own my_own_inet.h, and have your header #include <arpa/inet.h>, and replace the preprocessor #define constants with C/C++ constants. HTH, --Eljay