php installatin

[abenet Getahun]

I have a problem installing php , the following are what I am getting when I configure php.
 
./configure' '--prefix=/www' '--enable-module=so'
 
this is in debug.log file
CONFIGURE:   './configure' '--prefix=/www' '--enable-module=so'
CC:         gcc
CFLAGS:     -g -O2
CPPFLAGS:
CXX:
CXXFLAGS:
INCLUDES:
LDFLAGS:
LIBS:
DLIBS:
SAPI:       cgi
PHP_RPATHS:
uname -a:   Linux dev.varastream.com 2.6.9-1.667 #1 Tue Nov 2 14:41:25 EST 2004 i686 i686 i386 GNU/Linux
gcc -o conftest -g -O2   conftest.c  1>&5
conftest.c: In function `int main()':
conftest.c:3: error: `exit' undeclared (first use this function)
conftest.c:3: error: (Each undeclared identifier is rep
 
 
this is in config.log file
 
his file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
configure:1656: checking host system type
configure:1756: checking for gcc
configure:1869: checking whether the C compiler (gcc  ) works
configure:1885: gcc -o conftest    conftest.c  1>&5
configure:1911: checking whether the C compiler (gcc  ) is a cross-compiler
configure:1916: checking whether we are using GNU C
configure:1925: gcc -E conftest.c
configure:1944: checking whether gcc accepts -g
configure:1977: checking whether gcc and cc understand -c and -o together
configure:1992: gcc -c conftest.c -o conftest.o 1>&5
conftest.c:1: error: ISO C++ forbids declaration of `foo' with no type
configure:2028: checking how to run the C preprocessor
configure:2049: gcc -E  conftest.c >/dev/null 2>conftest.out
configure:2109: checking for AIX
configure:2136: checking if compiler supports -R
configure:2151: gcc -o conftest -g -O2   conftest.c -R /usr/lib  1>&5
gcc: unrecognized option `-R'
/usr/lib: file not recognized: Is a directory
collect2: ld returned 1 exit status
configure: failed program was:
#line 2144 "configure"
#include "confdefs.h"
    
int main() {

Please help thanks.
 

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