急！！关于sqwebmail3.5.3的编译出错，无法安装呀

浪色海洋

#./configure --without-authpam --without-authuserdb --enable-webpass=no --without-authpwd --without-authshadow
#make configure-check
都没有错误，但是我
#make
就报错：
[root@mail sqwebmail-3.5.3]# make
make all-gmake-check FOO=BAR
make[1]: Entering directory `/software/qmail/sqwebmail-3.5.3'
make[1]: Leaving directory `/software/qmail/sqwebmail-3.5.3'
Making all in numlib
make[1]: Entering directory `/software/qmail/sqwebmail-3.5.3/numlib'
make  all-am
make[2]: Entering directory `/software/qmail/sqwebmail-3.5.3/numlib'
Compiling strhinot.c
strhinot.c:10:27: string.h: No such file or directory
strhinot.c: In function `libmail_strh_ino_t':
strhinot.c:28: warning: implicit declaration of function `strcpy'
make[2]: *** [strhinot.o] Error 1
make[2]: Leaving directory `/software/qmail/sqwebmail-3.5.3/numlib'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/software/qmail/sqwebmail-3.5.3/numlib'
make: *** [all-recursive] Error 1

这是什么问题呀！！！！

laixi781211

找不到这个文件string.h