$# get a copy of conftest.h as it exists right before the failure....
$ cat <<EOF > conftest.c
 #include "confdefs.h"

    void mm_log(void){}
    void mm_dlog(void){}
    void mm_flags(void){}
    void mm_fatal(void){}
    void mm_critical(void){}
    void mm_nocritical(void){}
    void mm_notify(void){}
    void mm_login(void){}
    void mm_diskerror(void){}
    void mm_status(void){}
    void mm_lsub(void){}
    void mm_list(void){}
    void mm_exists(void){}
    void mm_searched(void){}
    void mm_expunged(void){}
    char mail_newbody();
    int main() {
      mail_newbody();
      return 0;
    }
EOF
$gcc -o conftest -g -O2  -L/usr/lib  -Wl,-rpath,/usr/kerberos/lib -L/usr/kerberos/lib conftest.c  -lc-client -lcrypt  -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lssl -lcrypto -lgmp -lfreetype -lpng -lz -ljpeg -ldb-4.1 -ldb-4.1 -lcurl -lbz2 -lz -lssl -lcrypto -lresolv -lm -ldl -lnsl  -lcurl -lssl -lcrypto -lgssapi_krb5 -lkrb5 -lcom_err -lk5crypto -lresolv -ldl -lz -lz -lssl -lcrypto -lssl -lcrypto -lgssapi_krb5 -lkrb5 -lcom_err -lk5crypto -lresolv -ldl -lz -l -lpam

$ echo $?
$ ls -l conftest