errors while making kdedevelop

[Harald Ensenberger]

After successfull compiling kdedevelop i got this errormessages

/opt/kde/lib/libkimgio.so: undefined reference to `png_set_strip_16'
/opt/kde/lib/libkimgio.so: undefined reference to `png_set_filler'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_create_read_struct'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_set_interlace_handling'
/opt/kde/lib/libkimgio.so: undefined reference to `TIFFReadRGBAImage'
/opt/kde/lib/libkimgio.so: undefined reference to `png_set_packing'
/opt/kde/lib/libkimgio.so: undefined reference to `png_set_IHDR'
/opt/kde/lib/libkimgio.so: undefined reference to `png_malloc'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_create_write_struct'
/opt/kde/lib/libkimgio.so: undefined reference to `png_write_info'
/opt/kde/lib/libkimgio.so: undefined reference to `png_set_PLTE'
/opt/kde/lib/libkimgio.so: undefined reference to `TIFFClose'
/opt/kde/lib/libkimgio.so: undefined reference to `png_set_expand'
/opt/kde/lib/libkimgio.so: undefined reference to `TIFFOpen'
/opt/kde/lib/libkimgio.so: undefined reference to `png_write_end'
/opt/kde/lib/libkimgio.so: undefined reference to `png_read_info'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_destroy_read_struct'
/opt/kde/lib/libkimgio.so: undefined reference to `png_write_image'
/opt/kde/lib/libkimgio.so: undefined reference to `png_read_update_info'

/opt/kde/lib/libkimgio.so: undefined reference to `png_read_row'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_create_info_struct'
/opt/kde/lib/libkimgio.so: undefined reference to
`png_destroy_write_struct'
/opt/kde/lib/libkimgio.so: undefined reference to `TIFFGetField'
/opt/kde/lib/libkimgio.so: undefined reference to `png_init_io'
/opt/kde/lib/libkimgio.so: undefined reference to `png_read_end'
make[2]: *** [kdevelop] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive-am] Error 2

libpng.so.2 is installed in /usr/X11R6/lib

can anybody help me?

Thank you!