clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations netinet_in/ntohl.c -o netinet_in/ntohl -D_POSIX_C_SOURCE=202405L  -lm  -lintl
netinet_in/ntohl.c:3:29: error: use of undeclared identifier 'ntohl'
uint32_t (*foo)(uint32_t) = ntohl;
                            ^
1 error generated.