[Exim] Failing on "make"

Hi there,

I am getting an error (still, but different error) when trying to do
the"make" .....

This is the error -

gcc -c -O  -o exim_dbmbuild.o exim_dbmbuild.c
In file included from exim.h:354,
                 from exim_dbmbuild.c:30:
dbstuff.h:101: db.h: No such file or directory
make[1]: *** [exim_dbmbuild.o] Error 1
make[1]: Leaving directory
`/export/home/trevor/exim-4.30/build-SunOS5-5.8-sparc'
make: *** [go] Error 2

Has anyone seen this before ???
In my Local/Makefile I have set these options -

USE_DB=yes
CC=gcc
SUPPORT_TLS=yes
TLS_LIBS=-L/usr/local/ssl/lib -lssl -lcrypto
TLS_INCLUDE=-I/usr/local/ssl/include

What line do I need to include in my Local/Makefile to get past this
dbstuff.h:101: db.h: No such file or directory ??

Please help
Trev