proftp 컴파일 에러 좀 봐주세요(__);

커널은 2.4.26이고요 와우7.3입니다. 제가 취한 조치는 automake, autoconf를 최신소스를 받아서 ./configure && make && make install 로 설치한 겁니다.

무엇이 잘못 되었을까요?

(__);

[root@localhost proftpd-1.2.9]# ./configure --prefix=/usr/local/proftpd
> --enable-autoshadow

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 for getopt... 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.

[root@localhost proftpd-1.2.9]# vi config.log

This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by configure, which was
generated by GNU Autoconf 2.57.  Invocation command line was

  $ ./configure --prefix=/usr/local/proftpd--enable-autoshadow

## --------- ##
## Platform. ##
## --------- ##

hostname = localhost.localdomain
uname -m = i686
uname -r = 2.4.26
uname -s = Linux
uname -v = #7 SMP Mon May 17 13:44:00 KST 2004

/usr/bin/uname -p = unknown
/bin/uname -X     = unknown

/bin/arch              = i686
/usr/bin/arch -k       = unknown
/usr/convex/getsysinfo = unknown
hostinfo               = unknown
/bin/machine           = unknown
/usr/bin/oslevel       = unknown
/bin/universe          = unknown

PATH: /usr/local/bin
PATH: /bin
PATH: /usr/bin
PATH: /usr/X11R6/bin
PATH: /home/chaibin/bin

## ----------- ##
## Core tests. ##
## ----------- ##

configure:1395: checking build system type
configure:1413: result: i686-pc-linux-gnu
configure:1421: checking host system type
configure:1435: result: i686-pc-linux-gnu
configure:1443: checking target system type
configure:1457: result: i686-pc-linux-gnu
configure:1536: checking for gcc
configure:1552: found /usr/bin/gcc
configure:1562: result: gcc
configure:1806: checking for C compiler version
configure:1809: gcc --version null>&5
2.95.4