Does anyone know a program similar to vlock that works with Slackware 9?

You can compile by source or run the tgz: ftp://ftp.nnov.net/pub/software/linu...ock-1.3.tar.gz

Well I've tried to compile vlock earlier, didn't either times, just got the following output:

gcc -O2 -c -o vlock.o vlock.c
gcc -O2 -c -o signals.o signals.c
gcc -O2 -c -o help.o help.c
gcc -O2 -c -o terminal.o terminal.c
gcc -O2 -c -o input.o input.c
gcc vlock.o signals.o help.o terminal.o input.o -o vlock
input.o(.text+0x28): In function `correct_password':
: undefined reference to `crypt'
input.o(.text+0x7a): In function `correct_password':
: undefined reference to `crypt'
collect2: ld returned 1 exit status
make: *** [vlock] Error 1


As for lockvc, that didn't work very well either:

gcc -O3 -march=i486 -c -o lockvc.o lockvc.c
In file included from lockvc.c:24:
/usr/lib/gcc-lib/i486-slackware-linux/3.2.3/include/stdio.h:454: syntax error before "sizeof"
lockvc.c: In function `authenticate':
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 2 of `strcmp' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 2 of `strncmp' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 1 of `strlen' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 2 of `strcmp' makes pointer from integer without a cast
lockvc.c:212: warning: passing arg 2 of `strncmp' makes pointer from integer without a cast
lockvc.c: In function `main':
lockvc.c:245: warning: return type of `main' is not `int'
make: *** [lockvc.o] Error 1


Is there anyone who has sucessfully compiled either vlock or lockvc or is the any other alternative?

I've solved it, just had to add:
in the Makefile.

Pretty simple, once I knew the answer