Make error with auth.c

[slaxative at gmail.com]

OS: Solaris 8
I'm attempting to build cups 1.3.9 on Solaris 8.
I ran configure with ./configure --enable-ssl
after running make I receive the following errors towards the end:

In file included from auth.c:57:
cupsd.h:164: parse error before `KerberosContext'
cupsd.h:164: warning: type defaults to `int' in declaration of `KerberosContext'
cupsd.h:164: warning: data definition has no type or storage class
auth.c: In function `cupsdAuthorize':
auth.c:344: `localuser' undeclared (first use in this function)
auth.c:344: (Each undeclared identifier is reported only once
auth.c:344: for each function it appears in.)
auth.c:344: warning: statement with no effect
auth.c:345: parse error before `char'
auth.c:830: `md5' undeclared (first use in this function)
auth.c:838: `basicmd5' undeclared (first use in this function)
auth.c:887: `nonce' undeclared (first use in this function)
auth.c:915: `states' undeclared (first use in this function)
make[1]: *** [auth.o] Error 1
make: *** [all] Error 1

Any help would be much appreciated.