[Exim] compile error, maybe because of pam...

<-- Warning: charset 'ks_c_5601-1987' is not supported -->

I tried to compile.?
and got following error message.?
of course, inserted "EXTRALIB=-lpam"?
?
(please send me e-mail, too. because I unscribed the mailing list...)?
?
Thanks...?
?
gcc -O -o exim_dbmbuild exim_dbmbuild.c \?
os.o -lnsl -lcrypt -lpam -ldb?
/lib/libpam.so: undefined reference to `dlerror'?
/lib/libpam.so: undefined reference to `dlclose'?
/lib/libpam.so: undefined reference to `dlopen'?
/lib/libpam.so: undefined reference to `dlsym'?
collect2: ld returned 1 exit status?
make[1]: *** [exim_dbmbuild] Error 1?
make[1]: Leaving directory `/home/imyaman/exim-3.12/build-Linux-i386'?
make: *** [go] Error 2?
[root@rhapsody exim-3.12]# ?