下記を見ながらqmailを入れてるんですが centossrv.com/qmail.shtml make setup checkを実行するとエラーが出ます。 make: 警告: ファイル `load' の修正時刻が 4.6e+03 秒分未来の時刻です ./compile qmail-local.c qmail-local.c: In function ‘temp_fork’: qmail-local.c:37: error: ‘errno’ undeclared (first use in this function) qmail-local.c:37: error: (Each undeclared identifier is reported only once qmail-local.c:37: error: for each function it appears in.) qmail-local.c: In function ‘temp_read’: qmail-local.c:38: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘temp_qmail’: qmail-local.c:42: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘maildir_child’: qmail-local.c:91: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘mailfile’: qmail-local.c:183: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘mailprogram’: qmail-local.c:247: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘checkhome’: qmail-local.c:316: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘qmeox’: qmail-local.c:338: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘qmeexists’: qmail-local.c:354: error: ‘errno’ undeclared (first use in this function) qmail-local.c: In function ‘main’: qmail-local.c:491: error: ‘errno’ undeclared (first use in this function) qmail-local.c:450: 警告: return type of ‘main’ is not ‘int’ make: *** [qmail-local.o] エラー 1