[Failure] 21.2 (beta17) "Chiyoda" XEmacs Lucid on i686-pc-cygwin 32

Now fails like this: gcc -c -O2 -Demacs -I. -DHAVE_CONFIG_H -I/usr/local/include -Wno-sign-compare - fno-caller-saves -I/usr/X11R6.3/include event-msw.c event-msw.c:76: redefinition of `struct tagNMHDR' event-msw.c:80: warning: redefinition of `NMHDR' e:\\H-i386-cygwin32\lib\gcc-lib\i386-cygwin32\2.7-B19\../../../../i386-cygwi n32/ include/Windows32/Structures.h:1999: warning: `NMHDR' previously declared here make[1]: *** [event-msw.o] Error 1 make: *** [dump-elcs] Error 2 uname -a: CYGWIN32_NT DILBERT 4.0 19.4 i686 unknown ./configure '--package-path=/binary/xemacs-20' '--site-includes=/usr/local/incl ude' '--cflags=-O2' XEmacs 21.2-b17 "Chiyoda" configured for `i686-pc-cygwin32'. Where should the build process find the source code? /binary/xemacs-21.2 What installation prefix should install use? /usr/local What operating system and machine description files should XEmacs use? `s/cygwin32.h' and `m/intel386.h' What compiler should XEmacs be built with? gcc -O2 Should XEmacs use the GNU version of malloc? yes Should XEmacs use the relocating allocator for buffers? default What window system should XEmacs use? x11 Where do we find X Windows header files? /usr/X11R6.3/include Where do we find X Windows libraries? /usr/X11R6.3/lib Additional header files: /usr/local/include Compiling in support for XAUTH. Compiling in support for XPM images. Compiling in support for PNG image handling. Compiling in support for (builtin) GIF image handling. Compiling in support for JPEG image handling. Compiling in support for TIFF image handling. Compiling in support for GNU DBM. Compiling in support for ncurses. Compiling in File coding support. Compiling in EXPERIMENTAL support for Drag'n'Drop ( msw ). Compiling in support for proper WM_COMMAND handling. Using Lucid menubars. Using Lucid scrollbars. Using Athena dialog boxes. movemail will use "dot-locking" for locking mail spool files. Compiling in extra code for debugging. WARNING: --------------------------------------------------------- WARNING: Compiling in support for runtime error checking. WARNING: XEmacs will run noticeably more slowly as a result. WARNING: Error checking is on by default for XEmacs beta releases. WARNING: ---------------------------------------------------------