When I try to build the 4.0.2 tarball using the native xlC compiler, it fails with a
severe error.

./configure --with-mysql --with-apxs=<path>
    :
make
    :
Making all in libmysql
        /bin/sh /home/coar/php/php-4.0.2/libtool --silent --mode=compile cc  -I.
-I/home/coar/php/php-4.0.2/ext/mysql/libmysql -I/home/coar/php/php-4.0.2 -I/home/coar/php/php-4.0.2/main
-I/home/coar/web/server/include -I/home/coar/php/php-4.0.2/Zend -I/home/coar/php/php-4.0.2
-I/home/coar/php/php-4.0.2/ext/mysql/libmysql -I/home/coar/php/php-4.0.2/ext/xml/expat/xmltok
-I/home/coar/php/php-4.0.2/ext/xml/expat/xmlparse  -DXML_BYTE_ORDER=21 -g  -c libmysql.c
"./global.h", line 484.17: 1506-334 (S) Identifier int8 has already been defined on line 606 of
"/usr/include/sys/inttypes.h".
"libmysql.c", line 165.59: 1506-280 (W) Function argument assignment between types "unsigned long*" and "int*" is not
allowed.
make: 1254-004 The error code from the last command is 1.

Stop.

I am retrying this with CFLAGS="-ma" ./configure ..., but it's unclear
whether that will make a difference.  In any event, it would be nice
if this had been detected out of the box.  Or am I (as usual) missing
something?