make problem

trying to follow the build instructions for sa-exim-2.2.

Here is the error i am getting.

# make sa-exim-2.2.so
Building sa-exim-2.2.so
gcc -I/downloads/exim-4.10/src  -DDLOPEN_LOCAL_SCAN
-DSPAMASSASSIN_CONF=\"/usr/exim/spamassassin.conf\"
-DSPAMC_LOCATION=\"/usr/bin/spamc\" -O2 -Wall -shared -o sa-exim-2.2.so
sa-exim.c
sa-exim.c: In function `local_scan_version':
sa-exim.c:37: `LOCAL_SCAN_ABI_VERSION' undeclared (first use in this
function)
sa-exim.c:37: (Each undeclared identifier is reported only once
sa-exim.c:37: for each function it appears in.)
sa-exim.c:350:2: warning: #warning you should not worry about the "might be
clobbered by longjmp", see source
make: *** [sa-exim-2.2.so] Error 1
# 

Any advise would be appreciated

Regards, 

Tom 
(serious newbie)