Compiling qmail Trouble, Can yoy help me???

I want compile qmail in my sever in ubuntu 5.10 in the first step i don´t have GCC runing in the server, the first step did install the package in the server but after that when i try to make the make setup check , i receive a error.

This the mesage than i receive

root@ubuntu:/usr/local/src/qmail/qmail-1.03# make setup check ./load auto-str substdio.a error.a str.a substdio.a(substdo.o): En la función allwrite': substdo.c:(.text+0x36): referencia a errno' sin definir collect2: ld devolvió el estado de salida 1 make: *** [auto-str] Error 1 root@ubuntu:/usr/local/src/qmail/qmail-1.03#

its kinda hard to tell seing as its in a diffirent language but i would suggest doing

sudo apt-get install build-essential

gord said: its kinda hard to tell seing as its in a diffirent language but i would suggest doing

sudo apt-get install build-essential

I've already done this, and still get this error. Any other thoughts?