Okay, I may be able to throw some light on this subject. I\'ve just managed to build full source and art tarball - I had the same problem with png support. It needs to be linked with libm for various functions (including pow()) which \'configure-jam\' wasn\'t doing (although interestingly, \'configure\' was - hence why Cyrix\'s worked).

I dredged through \'configure-jam\' and \'configure-jam.ac\' but got lost in the mire and gave up trying to tell it that it needed to link with lib m, so I fudged it by setting the CFLAGS enironment variable to \'-lm\' whilst running \'configure-jam\'! It then sucessfully detected libpng and built CS with png support!. Hurrah!

So it looks like you need to tell \'configure-jam\' that libpng needs libm, but I don\'t know autoconf, so I\'ll leave you to do that one.

Incidentally, you may want to change this post title to something slightly more informative!!