[Exim] compiling under redhat 6.1

Hi,

when I try to compile exim-3.13 under redhat it give me the following error
(building with mysql support) :

[root@webmail exim-3.13]# make
`Makefile' is up to date.

make[1]: Entering directory `/usr/local/soft/exim-3.13/build-Linux-i386'
make[2]: Entering directory
`/usr/local/soft/exim-3.13/build-Linux-i386/pcre'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/usr/local/soft/exim-3.13/build-Linux-i386/pcre'
make[1]: *** No rule to make target `spool_in.c', needed by `spool_in.o'.
Stop.
make[1]: Leaving directory `/usr/local/soft/exim-3.13/build-Linux-i386'
make: *** [go] Error 2

Anyone know how to fix that ?

Thank,

Jens