Can't compile SAMBA

[Jeroen]

Hello all

I keep getting an errormessage no mather what type
of Linux I try in the Makefile.
It is allways with smbpass.c
Message:
    In file included from smbpass.c:20:
    includes.h:288: crypt.h: No such file or directory
    make: ***smbpass.o Error 1
And indeed there is no file called crypt.h in the sourcefile
of samba.
Howcome?
How do I get this crypt.h file?
I use Slackware 3.4  kernel 2.0.34.
What is that PAM in the Makefile

Greetings,
        Jeroen