How did you compile and install PHP? Are you sure you have a clean installation and not a mixture of different PHPs? It works for me properly. Also: what kind of Unix are you using?

yes, I am sure, I download PHP archive from this site and compile it manually 
always;

It does not matter how I compile. Just open php-
5.3.6/ext/pdo_mysql/php_pdo_mysql_int.h
and look at lines 27-29

You can compile only from the root folder of the archive, but if you want to 
build the extension separately with phpize, you need to edit the source.

To compile the extension stand-alone you need an installed PHP. I was asking about that.

yes, I have it installed. It was a re-compilation of an extension due to another 
error: http://bugs.php.net/bug.php?id=54646

I understand you are busy and abused by reports, but this is not that case.
I managed to recompile it after patching the header file.

Please re-read the description.

The mysqlnd.h file inside the distribution is *not* the file you are looking for. You are looking for a file installed on your system. The installation where "phpize" is coming from.

Look:

# tar -xjf php-5.3.6.tar.bz2
mysqli]# cd php-5.3.6/ext/mysqli/
mysqli]# phpize; ./configure --with-mysqli=mysqlnd; make
...
Build complete.
Don't forget to run 'make test'.
mysqli]# cd ../pdo_mysql/
pdo_mysql]# phpize;./configure --with-pdo-mysql=mysqlnd;make
...
In file included from /usr/src/web/php-5.3.6/ext/pdo_mysql/pdo_mysql.c:32:
/usr/src/web/php-5.3.6/ext/pdo_mysql/php_pdo_mysql_int.h:28:38: error: 
ext/mysql/mysql_mysqlnd.h: No such file or directory
make: *** [pdo_mysql.lo] Error 1

# php -v
PHP 5.3.6 (cli) (built: Apr 30 2011 21:21:49) (DEBUG)
Copyright (c) 1997-2011 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies

pdo_mysql]# cd ../..
php-5.3.6]# ./configure --with-pdo-mysql=mysqlnd;make

Build complete.
Don't forget to run 'make test'.



What else can I show you?

There is one phpize in the system, and I reinstalled PHP to ensure the error 
persists.
mysqlnd.h exists and is present in the proper folder

[root@devel php-5.3.6]# whereis phpize
phpize: /usr/local/bin/phpize

[root@devel php-5.3.6]# phpize -v
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626

[root@devel php-5.3.6]# locate mysqlnd.h
/usr/local/include/php/ext/mysqlnd/mysqlnd.h
/usr/local/include/php/ext/mysqlnd/php_mysqlnd.h
/usr/src/web/php-5.3.6/ext/mysql/mysql_mysqlnd.h
/usr/src/web/php-5.3.6/ext/mysqli/mysqli_mysqlnd.h
/usr/src/web/php-5.3.6/ext/mysqlnd/mysqlnd.h
/usr/src/web/php-5.3.6/ext/mysqlnd/php_mysqlnd.h

[root@devel php-5.3.6]# ll /usr/local/include/php/ext/mysqlnd/mysqlnd.h
-rw-r--r-- 1 root root 17088 2011-05-02 20:49 
/usr/local/include/php/ext/mysqlnd/mysqlnd.h

[root@devel php-5.3.6]# php-config --includes
-I/usr/local/include/php -I/usr/local/include/php/main -
I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -
I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib

The problem is quite weird. 
I guess this line:
#      include "ext/mysql/mysql_mysqlnd.h"
..is some kind of leftover from the good ol' times when mysqlnd was a part of ext/mysql/; at least nothing breaks if I remove it.

So the patch is as easy as this:
--- php_pdo_mysql_int.h (revision 307861)
+++ php_pdo_mysql_int.h (working copy)
@@ -25,7 +25,6 @@

 #if defined(PDO_USE_MYSQLND)
 #      include "ext/mysqlnd/mysqlnd.h"
-#      include "ext/mysql/mysql_mysqlnd.h"
 #      include "ext/mysqlnd/mysqlnd_libmysql_compat.h"
 #      define PDO_MYSQL_PARAM_BIND MYSQLND_PARAM_BIND
 #else

There's also another issue: you can't install mysqlnd itself, you have to install one of the extensions using it. So in order to build shared version of PDO_MYSQL with myslnd you have to build ext/mysql with myslnd *statically*.
I believe ext/mysqlND should be full-grown extension with its own --enable-mysqlnd option, this was you could build it separately AND still be able to use your automagic with $PHP_MYSQLND_ENABLED.

thanks!

I am sorry for the wrong initial description, complaining at # include 
"ext/mysqlnd/mysqlnd.h" while the error clearly told about 
"ext/mysql/mysql_mysqlnd.h"

I didn't commit the patch yet, I still want to hear from the MySQL guys first.
Also it's their domain, not mine.

Tony,
you are not exactly right. ext/mysql/mysql_mysqlnd.h is not a left-over. If you take a look into ext/mysqli you will find mysqli_mysqlnd.h, which is larger but follows the same schema - ext_driver (mysqli_libmysql.h exists). However, mysql_myslqnd.h is so small, that it could be incorporated into another file, if wanted.

Best,
Andrey

Andrey, whatever that header is, its contents is not used in PDO_MYSQL and the header itself is not installed, which means there's not way to build PDO_MYSQL+mysqlnd dynamically.

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.