проблемы с chbg

при компиляции chbg-1.5 вылетает с ошибками:

absimg.o(.text+0x141): In function `absimg_rgb_savePNG':
/home/tmp/chbg-1.5/src/absimg.c:92: undefined reference to `png_create_write_struct'
absimg.o(.text+0x14c):/home/tmp/chbg-1.5/src/absimg.c:97: undefined reference to `png_create_info_struct'
absimg.o(.text+0x174):/home/tmp/chbg-1.5/src/absimg.c:106: undefined reference to `png_init_io'
absimg.o(.text+0x19b):/home/tmp/chbg-1.5/src/absimg.c:107: undefined reference to `png_set_IHDR'
absimg.o(.text+0x1bf):/home/tmp/chbg-1.5/src/absimg.c:113: undefined reference to `png_convert_from_struct_tm'
absimg.o(.text+0x1d0):/home/tmp/chbg-1.5/src/absimg.c:114: undefined reference to `png_set_tIME'
absimg.o(.text+0x1df):/home/tmp/chbg-1.5/src/absimg.c:116: undefined reference to `png_write_info'
absimg.o(.text+0x22e):/home/tmp/chbg-1.5/src/absimg.c:124: undefined reference to `png_write_image'
absimg.o(.text+0x245):/home/tmp/chbg-1.5/src/absimg.c:127: undefined reference to `png_write_end'
absimg.o(.text+0x254):/home/tmp/chbg-1.5/src/absimg.c:128: undefined reference to `png_destroy_write_struct'
absimg.o(.text+0x278):/home/tmp/chbg-1.5/src/absimg.c:101: undefined reference to `png_destroy_write_struct'
collect2: ld returned 1 exit status
make[1]: *** [chbg] Ошибка 1
make[1]: Leaving directory `/home/tmp/chbg-1.5/src'
make: *** [all-recursive] Ошибка 1

прошу помощи