安装proftp时出错。各位帮帮忙。

徘徊边缘

软件版本：proftpd-1.2.8p  proftpd-1.2.9rc1  proftpd-1.2.9rc2  proftpd-1.2.9rc3都使用过，出现相同的问题。

但在之前编译其他软件如：apache..mysql..qmail.vpopmail 的时候却没有出现使何错误。
./configure时都出现这个错误。。

gcc已经安装
[root@localhost proftpd-1.2.8]# rpm -q gcc
gcc-3.2.2-5

glibc也已经安装
[root@localhost proftpd-1.2.8]# rpm -q glibc
glibc-2.3.2-11.9


详细错误信息:



[code:1]

[root@localhost proftpd-1.2.8]# ./configure --prefix=/usr/proftpd                   checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for ranlib... ranlib
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... 64
checking for _LARGE_FILES value needed for large files... no
checking whether the C compiler accepts -Wall... yes
checking whether gcc accepts -Wno-long-double... no
checking for standalone crypt... no
checking for crypt in -lcrypt... yes
checking for standalone gethostbyname... yes
checking for standalone inet_aton... yes
checking for standalone nsl functions... yes
checking for standalone socket functions... yes
checking for _pw_stayopen variable... no
checking for set_auth_parameters in -lsecurity... no
checking for setprpwent in -lsec... no
checking how to run the C preprocessor... /lib/cpp
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
[/code:1]