how do i fix these errors while compiling
nom:~/ssh-1.2.30 # make
gcc -pipe -c -I. -I./gmp-2.0.2-ssh-2 -I./zlib-1.0.4
-DHAVE_CONFIG_H -DHOST_KEY_FILE=\"/etc/ssh_host_key\"
-DHOST_CONFIG_FILE=\"/etc/ssh_config\"
-DSERVER_CONFIG_FILE=\"/etc/sshd_config\"
-DSSH_PROGRAM=\"/usr/local/bin/ssh1\" -DETCDIR=\"/etc\"
-DPIDDIR=\"/var/run\" -DSSH_BINDIR=\"/usr/local/bin\"
-DTIS_MAP_FILE=\"/etc/sshd_tis.map\" -D_GNU_SOURCE -g -O2 ssh.c
ssh.c: In function `main':
ssh.c:418: storage size of `ws' isn't known
ssh.c:903: `TIOCGWINSZ' undeclared (first use in this function)
ssh.c:903: (Each undeclared identifier is reported only once
ssh.c:903: for each function it appears in.)
make: *** [ssh.o] Error 1
