On Tue, Dec 05, 2006 at 03:00:56AM +0300, Alexei V. Mezin wrote:
> gcc Pager.o x_pager.o ../Config/libasConfig.so 
> ../../asimagelib/libasimage.so  ../../lib/libafterstep.so   -ljpeg -lpng 
> -lz -lm   -lXext -lX11      -lSM -lICE -lXpm  -o Pager
> ../../asimagelib/libasimage.so: undefined reference to 
> `png_create_read_struct'
[...]

При сборке libasimage.so пропущены -lpng -lXpm -ljpeg.