ldap_kerberos_bind_s is not available in all ldap distributions

c/ldap.c

@@ -77,6 +77,7 @@ s48_value scsh_ldap_simple_bind_s(s48_value ldap, s48_value user, s48_value cred
 
 s48_value scsh_ldap_kerberos_bind_s(s48_value ldap, s48_value dn)
 {
+#if HAVE_LDAP_KERBEROS_BIND_S
   int r;
   S48_DECLARE_GC_PROTECT(2);
   
@@ -84,6 +85,9 @@ s48_value scsh_ldap_kerberos_bind_s(s48_value ldap, s48_value dn)
   r = ldap_kerberos_bind_s(scsh_extract_ldap(ldap), s48_extract_string(dn));
   S48_GC_UNPROTECT();
   return s48_enter_integer(r);
+#else
+  return S48_FALSE;
+#endif
 }
 
 s48_value scsh_ldap_unbind_s(s48_value ldap)

c/scsh-ldap.h

@@ -1,4 +1,5 @@
 #include "scheme48.h"
+#include "config.h"
 
 #include <stdlib.h>
 #include <sys/time.h>