I've tried to install qmail 1.03 on CentOS 4.4 using the command: # make setup check and I received this error: ./load auto-str substdio.a error.a str.a substdio.a(substdo.o)(.text+0x43): In function `allwrite': : undefined reference to `errno' collect2: ld returned 1 exit status make: *** [auto-str] Error 1 Can anyone please help? TIA Dick Holland