Another libESMTP compile problem

["Chausson, Cedric (FR - Neuilly)" <cchausson deloitte fr>]

I solved my earlier compile problem by downloading openssl-devel, the make
process went further than last time but it stopped at this new error
message. I don't have a clue what it means :

errors.c: In function `set_herror':
errors.c:193: `ENOMEM' undeclared (first use in this function)
errors.c:193: (Each undeclared identifier is reported only once
errors.c:193: for each function it appears in.)
make[2]: *** [errors.lo] Error 1
make[2]: Leaving directory
`/home/Cedric/Installation/libesmtp-0.8.3.orig'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory
`/home/Cedric/Installation/libesmtp-0.8.3.orig'
make: *** [all-redirect] Error 2

Any ideas how to fix this ?

Thanks in advance.