求助，我在本站下载的 wu－ftpd 2.6.2 安装出现问题。

古典VS金属

解压一切正常，解压完毕后 运行 make 时 出现错误代码如下：

lll@love[/tmp/wu-ftpd-2.6.2]make
(cd support ; make all)
rm -f libsupport.a
ar cq libsupport.a authuser.o
ranlib libsupport.a
(cd util/privatepw ; make all)
(cd src ; make all)
gcc  -g -O2 -I.. -I../support -c -o ftpd.o ftpd.c
In file included from ftpd.c:83:
proto.h:295: error: conflicting types for 'strcasestr'
/usr/include/string.h:71: error: previous declaration of 'strcasestr' was here
proto.h:295: error: conflicting types for 'strcasestr'
/usr/include/string.h:71: error: previous declaration of 'strcasestr' was here
ftpd.c: In function `pass':
ftpd.c:2648: warning: comparison between pointer and integer
*** Error code 1

Stop in /tmp/wu-ftpd-2.6.2/src.
*** Error code 1

Stop in /tmp/wu-ftpd-2.6.2.