stas, I didn't know of any successful attempts to build syck-
library on windows.

If you have other data, I would be glad to provide config.w32 
file

Does this library use any non-portable code? On the face of it, such library should be running anywhere there's a C compiler. Unfortunately, I couldn't get to the syck site, so I couldn't check it myself.

You can add the following content for config.w32 :

// $Id$
// vim:ft=javascript

ARG_WITH("ssh2", "SSH2 support", "no");

if (PHP_SSH2 != "no") {
  if ((CHECK_LIB("libssh2_a.lib;libssh2.lib", "ssh2", PHP_SSH2) &&
    CHECK_HEADER_ADD_INCLUDE("libssh2.h", "CFLAGS_SSH2", PHP_PHP_BUILD + "\\include\\libssh2"))) {
      AC_DEFINE('HAVE_SSH2LIB', 1);
      AC_DEFINE('PHP_SSH2_REMOTE_FORWARDING', 1);
      AC_DEFINE('PHP_SSH2_HOSTBASED_AUTH', 1);
      AC_DEFINE('PHP_SSH2_POLL', 1);
      AC_DEFINE('PHP_SSH2_PUBLICKEY_SUBSYSTEM', 1);

      EXTENSION("ssh2", "ssh2.c ssh2_fopen_wrappers.c ssh2_sftp.c");

  } else {
    WARNING("ssh2 not enabled: libraries or headers not found");
  }
}

I successfully built on Windows 2008 32 bits version

Due to this extension not seeing any activity since 2008, this issue will not be fixed. We are therefore closing this now.