Compilling error

[Kenwood]

I am trying to compile sqwebmail 3.0 on a debian system, with kernel 2.2.19   ./configure go well   when I am doing make, I am getting this error, if anyone can solve it, thanks in advance!   authvchkpw.c: In function `auth_vchkpw_changepass': authvchkpw.c:142: warning: assignment from incompatible pointer type authvchkpw.c:151: dereferencing pointer to incomplete type authvchkpw.c:151: dereferencing pointer to incomplete type make[1]: *** [authvchkpw.o] Error 1 make[1]: Leaving directory `/root/sqwebmail-3.0.0.20010821/authlib' make: *** [all-recursive] Error 1 riken:~/sqwebmail-3.0.0.20010821#     Thanks again!