LinuxQuestions.org - error: C preprocessor "/lib/cpp" fails sanity check

umm, right i keep getting this error when i try to install unrealircd, gcc is there + g++ its a server with cpanel one and its a limted account but i dont see why its woudnt work, also /lib/cpp is there also

we dont no what linux box it is, since my friend borught it, it looks like fedora to me but anyway any help heres the config log

Code:

./configure --enable-hub --enable-ssl --enable-prefixaq 

--with-listen=5 --with-dpath=/home/ukepeng/Unreal3.2 

--with-spath=/home/ukepeng/Unreal3.2/src/ircd

 --with-nick-history=2000 

--with-sendq=3000000 --with-bufferpool=18 --with-hostname=server19.integrityserver.net 

--with-permissions=0600 -

-with-fd-setsize=1024 --enable-dynamic-linking

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 if gcc has a working -pipe... yes

checking for rm... /bin/rm

checking for cp... /bin/cp

checking for touch... /bin/touch

checking for openssl... /usr/bin/openssl

checking for install... /usr/bin/install

checking for gmake... gmake

checking for gmake... /usr/bin/gmake

checking for gunzip... /bin/gunzip

checking for pkg-config... /usr/bin/pkg-config

checking for crypt in -ldescrypt... no

checking for crypt in -lcrypt... yes

checking for socket in -lsocket... no

checking for inet_ntoa in -lnsl... yes

checking how to run the C preprocessor... /lib/cpp

configure: error: C preprocessor "/lib/cpp" fails sanity check

make: *** No rule to make target `pem'.  Stop.

just remeber its Fedora i686