n1mda@royal:~/programming/c/n1tr$ i586-mingw32msvc-gcc -lws2_32 -o client client.c 
/tmp/ccyeduiN.o:client.c:(.text+0x4a): undefined reference to `_WSAStartup@8'
/tmp/ccyeduiN.o:client.c:(.text+0x65): undefined reference to `_gethostbyname@4'
/tmp/ccyeduiN.o:client.c:(.text+0x79): undefined reference to `_socket@12'
/tmp/ccyeduiN.o:client.c:(.text+0xa5): undefined reference to `_htons@4'
/tmp/ccyeduiN.o:client.c:(.text+0xbe): undefined reference to `_inet_ntoa@4'
/tmp/ccyeduiN.o:client.c:(.text+0xc4): undefined reference to `_inet_addr@4'
/tmp/ccyeduiN.o:client.c:(.text+0xf4): undefined reference to `_connect@12'
collect2: ld returned 1 exit status


//#include <windows.h>
#include <winsock.h>
//#include <stdio.h>

#pragma comment(lib,"wsock32.lib")

EDIT: Solution: i586-mingw32msvc-gcc -o client client.c -lws2_32

The library flag must come AFTER source input