Build warnings (minor issue)

When running 'make wrapper' these warnings appear.

Nothing is important but they should be tidied, this is
with Linux FC4/x86 (incidentally, I notice that my
CFLAGS are ignored).

cc  -DBIN=\"/usr/majordomo/majordomo-1.94.5\"
-DPATH=\"PATH=/bin:/usr/bin:/usr/local/bin\"
-DHOME=\"HOME=/usr/majordomo/majordomo-1.94.5\"
-DSHELL=\"SHELL=/bin/sh\"
-DMAJORDOMO_CF=\"MAJORDOMO_CF=/usr/majordomo/majordomo-1.94.5/majordomo.cf\" -DPOSIX_UID=504 -DPOSIX_GID=504 -o wrapper wrapper.c
wrapper.c: In function ‘main’:
wrapper.c:71: warning: incompatible implicit declaration of built-in
function ‘exit’
wrapper.c:78: warning: incompatible implicit declaration of built-in
function ‘exit’
wrapper.c:81: warning: incompatible implicit declaration of built-in
function ‘malloc’
wrapper.c:83: warning: incompatible implicit declaration of built-in
function ‘exit’
wrapper.c:143: warning: incompatible implicit declaration of built-in
function ‘exit’
wrapper.c:156: warning: incompatible implicit declaration of built-in
function ‘exit’

-- 
Nigel Horne. Arranger, Adjudicator, Band Trainer, Composer, Typesetter.
NJH Music, Barnsley, UK.  ICQ#20252325
[email protected] http://www.bandsman.co.uk