php 5.2.4 compile error on AIX 5.2

[MarvinP@xxxxxxxxx]

$ make all
       /bin/sh /opt/app/php/php-5.2.4/libtool --silent --preserve-dup-deps --mode=compile gcc -I"/usr/include" -Iext/iconv/ -I/opt/app/php/php-5.2.4/ext/iconv/ -DPHP_ATOM_INC -I/opt/app/php/php-5.2.4/include -I/opt/app/php/php-5.2.4/main -I/opt/app/php/php-5.2.4 -I/opt/pware/include/libxml2 -I/usr/local/include -I/opt/app/php/php-5.2.4/ext/date/lib -I/opt/app/mysql/include -I/opt/app/php/php-5.2.4/TSRM -I/opt/app/php/php-5.2.4/Zend    -I/usr/include -g -O2  -c /opt/app/php/php-5.2.4/ext/iconv/iconv.c -o ext/iconv/iconv.lo
/opt/app/php/php-5.2.4/ext/iconv/iconv.c: In function 'zm_startup_miconv':
/opt/app/php/php-5.2.4/ext/iconv/iconv.c:256: error: '_libiconv_version' undeclared (first use in this function)
/opt/app/php/php-5.2.4/ext/iconv/iconv.c:256: error: (Each undeclared identifier is reported only once
/opt/app/php/php-5.2.4/ext/iconv/iconv.c:256: error: for each function it appears in.)
/opt/app/php/php-5.2.4/ext/iconv/iconv.c: In function '_php_iconv_substr':
/opt/app/php/php-5.2.4/ext/iconv/iconv.c:677: warning: pointer targets in passing argument 1 of '_php_iconv_strlen' differ in signedness
make: 1254-004 The error code from the last command is 1.


Stop.
@chbuxa01(wikimin):/opt/app/php/php-5.2.4
$ gcc -v      
Using built-in specs.
Target: powerpc-ibm-aix5.2.0.0
Configured with: ../configure --with-as=/usr/bin/as --with-ld=/usr/bin/ld --disable-nls --enable-languages=c,c++ --prefix=/opt/freeware --enable-threads --enable-version-specific-runtime-libs --host=powerpc-ibm-aix5.2.0.0
Thread model: aix
gcc version 4.0.0