Compile problems iostream.h No such file or directory

Hi; 

Trying to figure this one out.
Any help would be great. 
Here is my configure ops. 
  >./configure --prefix=/usr/local/php 
                    --with-zeus=/usr/local/zeus 
                    --with-mysql=/usr/local/mysql 
                    --enable-libgcc 
                    --oldincludedir=/usr/local/include
Stats
----------------------------------------------------------------------------
----------------
Solaris 2.6 
>pkginfo| grep GNU
utility     GNUaconf       GNU autoconf 2.12 SPARC Solaris 2.6
utility     GNUamake       GNU automake 1.3 SPARC Solaris 2.6
utility     GNUbison       GNU bison 1.25
utility     GNUgcc         GNU gcc 2.7.2.3 SPARC Solaris 2.6
utility     GNUlibstc      GNU libstdc++ 2.8.1.1 SPARC Solaris 2.6
utility     GNUmake        GNU make 3.77 SPARC Solaris 2.6
utility     GNUpatch       GNU patch 2.5 SPARC Solaris 2.6
utility     GNUplot        GNU plot 3.5 SPARC Solaris 2.6
utility     GNUtar         GNU tar 1.12 SPARC Solaris 2.6
utility     GNUzip         GNU zip 1.2.4 SPARC Solaris 2.6


>make
Making all in Zend
make[1]: Entering directory `/infinet/src/php-4.0.0/Zend'
/bin/sh ../libtool --silent --mode=compile c++ -DHAVE_CONFIG_H -I. -I. -I..
  -D
_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -DXML_BYTE_ORDER=21
-I../TSRM  -g -O2 -c zend-scanner-cc.cc
In file included from zend-scanner-cc.cc:241:
FlexLexer.h:47: iostream.h: No such file or directory
./zend-scanner.l:53: fstream.h: No such file or directory
./zend-scanner.l:63: strstream.h: No such file or directory
make[1]: *** [zend-scanner-cc.lo] Error 1
make[1]: Leaving directory `/infinet/src/php-4.0.0/Zend'
make: *** [all-recursive] Error 1



grrr ...