Description:
------------
PHP 5.0.4 fails to compile against LibXML2 2.6.19/LibXSLT 1.1.14. It also fails against LibXSLT 1.1.13 in a second test to see if it was a bad release of LibXSLT.

It compiles successfully without LibXSLT in --configure.

It compiles successfully against Redhat-supplied LibXML 2.5.10 /LibXSLT 1.0.33

Looks similiar to #30534, but I explicitly specified a path to my LibXML2 and LibXSLT installation (both libraries have two installed versions -- RedHat's, and mine.)

Reproduce code:
---------------
# './configure' '--prefix=/usr/local/php-5.0.4' '--with-apxs=/usr/local/apache/bin/apxs' '--enable-inline-optimization' '--enable-force-cgi-redirect' '--enable-discard-path' '--disable-ipv6' '--with-openssl' '--enable-calendar' '--with-mysql=/usr/local/mysql' '--enable-pcntl' '--with-spell' '--with-curl=/usr/local/curl' '--with-zlib' '--with-bz2' '--with-libxml=/usr/libxml2' '--with-xsl=/usr/libxslt'

# make



Expected result:
----------------
I expect to end up with a shiny new PHP binary ;)

Actual result:
--------------
[...]

/bin/sh /usr/local/src/php-5.0.4/libtool --silent --preserve-dup-deps --mode=compile gcc  -Iext/xsl/ -I/usr/local/src/php-5.0.4/ext/xsl/ -DPHP_ATOM_INC -I/usr/local/src/php-5.0.4/include -I/usr/local/src/php-5.0.4/main -I/usr/local/src/php-5.0.4 -I/usr/include/libxml2 -I/usr/local/mysql/include -I/usr/libxslt/include -I/usr/libxml2/include/libxml2 -I/usr/local/src/php-5.0.4/TSRM -I/usr/local/src/php-5.0.4/Zend    -g -O2  -prefer-non-pic -c /usr/local/src/php-5.0.4/ext/xsl/php_xsl.c -o ext/xsl/php_xsl.lo
In file included from /usr/libxslt/include/libxslt/xsltInternals.h:20,
                 from /usr/local/src/php-5.0.4/ext/xsl/php_xsl.h:38,
                 from /usr/local/src/php-5.0.4/ext/xsl/php_xsl.c:28:
/usr/libxml2/include/libxml2/libxml/dict.h:30: syntax error before "xmlDictPtr"
/usr/libxml2/include/libxml2/libxml/dict.h:31: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:32: syntax error before "xmlDictPtr"
/usr/libxml2/include/libxml2/libxml/dict.h:33: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:34: syntax error before "int"
/usr/libxml2/include/libxml2/libxml/dict.h:35: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:36: syntax error before "void"
/usr/libxml2/include/libxml2/libxml/dict.h:37: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:42: syntax error before "const"
/usr/libxml2/include/libxml2/libxml/dict.h:43: syntax error before "xmlDictLookup"
/usr/libxml2/include/libxml2/libxml/dict.h:45: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:46: syntax error before "const"
/usr/libxml2/include/libxml2/libxml/dict.h:47: syntax error before "xmlDictExists"
/usr/libxml2/include/libxml2/libxml/dict.h:49: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:50: syntax error before "const"
/usr/libxml2/include/libxml2/libxml/dict.h:51: syntax error before "xmlDictQLookup"
/usr/libxml2/include/libxml2/libxml/dict.h:53: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:54: syntax error before "int"
/usr/libxml2/include/libxml2/libxml/dict.h:56: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:57: syntax error before "int"
/usr/libxml2/include/libxml2/libxml/dict.h:58: warning: data definition has no type or storage class
/usr/libxml2/include/libxml2/libxml/dict.h:63: syntax error before "void"
/usr/libxml2/include/libxml2/libxml/dict.h:64: warning: data definition has no type or storage class
make: *** [ext/xsl/php_xsl.lo] Error 1