Hi! I'm having a trouble trying to make programs install from the source. No matter what program i try, i always get this error:
-------------------
checking how to run the C preprocessor... /lib/cpp
configure: error: in `/home/normal/Desktop/warzone2100-2.2.4':
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
--------------------
I always get this error when i run "./configure". I don't know what that means, but i tried everything i know, and everything i didn't know.
Hope you can help me!
Thank you!

EDIT: Here is the full output if i missed something:
[normal@localhost ~]$ cd ./Desktop/warzone2100-2.2.4
[normal@localhost warzone2100-2.2.4]$ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for style of include used by make... GNU
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking dependency style of gcc... gcc3
checking for gcc option to accept ISO C99... -std=gnu99
checking for gcc -std=gnu99 option to accept ISO Standard C... (cached) -std=gnu99
checking for ranlib... ranlib
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking for bison... bison -y
checking for bison >= 1.31... found 2.4.1, ok
checking for flex... flex
checking lex output file root... lex.yy
checking lex library... none needed
checking whether yytext is a pointer... no
checking for flex >= 2.5.33... found 2.5.33, ok
checking for flex != 2.5.34... not found, good
checking whether perl executable path has been provided... no
checking for perl... /usr/bin/perl
checking for a sed that does not truncate output... /bin/sed
checking for grep that handles long lines and -e... /bin/grep
checking for perl version... 5.10.1
checking for gawk... (cached) gawk
checking how to run the C preprocessor... /lib/cpp
configure: error: in `/home/normal/Desktop/warzone2100-2.2.4':
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
[normal@localhost warzone2100-2.2.4]$