我在redhat 9.0 下编译qmail 出错.

netsolve

错误信息如下

./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

请高手指点