A J Rossini <arossini(a)biostat.washington.edu> writes in xemacs-beta(a)xemacs.org:
Is XPM support and the symbolic names necessarily true for Microsoft
Windows OS's, as well?
It is as alien a format as PNG is, relatively speaking. Of course on
anything but Linux, Xpm is an alien format there too.
I have yet to figure out how to build Xpm in one-pass on a system
without either of:
1. A working xmkmf (it's unbelievable that vendors ship X11 without a
functional xmkmf, no wonder Unix graphics gets a bad rap :-()
2. A previously installed Xpm (building sxpm and cxpm puke and die).
Building PNG and zlib has gone without a hitch on all the systems I've
tried it on.
 Make that some installations of Linux. I thought PNG was a
standard part of every Linux distribution, but I've already gotten a
report about one where it is not.