/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_socket/getpeername.c -o sys_socket/getpeername -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
sys_socket/getpeername.c:5:67: error: use of undeclared identifier 'getpeername'; did you mean 'ngetpeername'?
int (*foo)(int, struct sockaddr *restrict, socklen_t *restrict) = getpeername;
                                                                  ^~~~~~~~~~~
                                                                  ngetpeername
/usr/include/sys/socket.h:641:9: note: 'ngetpeername' declared here
int     getpeername(int, struct sockaddr *__restrict__, socklen_t *__restrict__);
        ^
/usr/include/sys/socket.h:169:25: note: expanded from macro 'getpeername'
#define getpeername     ngetpeername
                        ^
1 error generated.