I try to compile XEmacs 21.2-b2 on Red Hat Linux release 4.2. Then, I got the following messages: glyphs-eimage.o: In function `png_instantiate': /work02/users/sf/xemacs/xemacs-21.2-b2/src/glyphs-eimage.c:940: undefined reference to `png_get_bKGD' /work02/users/sf/xemacs/xemacs-21.2-b2/src/glyphs-eimage.c:959: undefined reference to `png_set_strip_alpha' make[1]: *** [temacs] Error 1 make: *** [dump-elcs] Error 2 and "make" stoped. What happend and what do I have to do ? Fukae Seiji fukae(a)ipc.hiroshima-u.ac.jp