[Tech] errore con courier-imap

[Stefano]

allora...
Sistema: linux Redhat 7.2
Qmail-->ok
Vmailmgr-->ok

durante l'installazione di courier-imap incappo fisso in questo errore:
il comando configure lo lancio come segue e va tutto ok
./configure --without-authpam --without-authldap --without-authpwd
--without-authmysql --without-authuserdb -with-authvchkpw

al lancio del make
[alessio@mail courier-imap-0.31]$ make | cat >errore.txt
testgdbm.C: In function `int kdcmp (const void *, const void *)':
testgdbm.C:22: `strcmp' undeclared (first use this function)
testgdbm.C:22: (Each undeclared identifier is reported only once for
each function it appears in.)
testgdbm.C: In function `int main (int, char **)':
testgdbm.C:62: `memcpy' undeclared (first use this function)
testgdbm.C:91: `strlen' undeclared (first use this function)
make[1]: *** [testgdbm.o] Error 1
make: *** [all-recursive] Error 1

il contenuto di errore.txt :
Making all in numlib
make[1]: Entering directory `/home/alessio/courier-imap-0.31/numlib'
make[1]: Leaving directory `/home/alessio/courier-imap-0.31/numlib'
Making all in gdbmobj
make[1]: Entering directory `/home/alessio/courier-imap-0.31/gdbmobj'
c++ -DHAVE_CONFIG_H -I. -I. -I. -g -O2 -c testgdbm.C
make[1]: Leaving directory `/home/alessio/courier-imap-0.31/gdbmobj'

credo che sia un problema con string.h ... ma essendo un newbie non so
dove toccare questa cosa sotto linux...
suggerimenti?