/opt/FriendlyARM/toolschain/4.5.1/lib/gcc/arm-none-linux-gnueabi/4.5.1/../../../../arm-none-linux-gnueabi/bin/ld: warning: libpng.so.3, needed by /opt/Qt4.7/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_valid'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_error_fn'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_create_info_struct'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_expand'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_read_info'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_write_info'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_strip_16'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_io_ptr'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_read_fn'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_write_image'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_destroy_read_struct'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_filler'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_IHDR'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_destroy_write_struct'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_oFFs'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_text'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_create_read_struct'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_sig_bytes'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_channels'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_tRNS'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_bgr'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_packing'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_sBIT'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_image_height'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_IHDR'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_gAMA'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_compression_level'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_gray_to_rgb'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_tRNS'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_write_fn'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_x_pixels_per_meter'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_write_end'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_write_chunk'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_image_width'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_y_pixels_per_meter'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_read_end'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_packswap'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_PLTE'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_read_image'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_create_write_struct'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_error'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_pHYs'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_read_update_info'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_gamma'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_invert_mono'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_set_PLTE'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_text'
/opt/Qt4.7/lib/libQtGui.so: undefined reference to `png_get_gAMA'
collect2: ld returned 1 exit status
make: *** [HelloTiny6410] 错误 1
这个是咋解决的，我看到库文件里面有libQtGui.so。不知道为什么不成功
