../../lib/libopencv_world.so.4.5.3: undefined reference to `png_do_expand_palette_rgb8_neon‘

交叉编译opencv4.5.3遇到如下错误：

../../lib/libopencv_world.so.4.5.3: undefined reference to `png_do_expand_palette_rgb8_neon'
../../lib/libopencv_world.so.4.5.3: undefined reference to `png_init_filter_functions_neon'
../../lib/libopencv_world.so.4.5.3: undefined reference to `png_do_expand_palette_rgba8_neon'
../../lib/libopencv_world.so.4.5.3: undefined reference to `png_riffle_palette_neon'
collect2: error: ld returned 1 exit status
apps/model-diagnostics/CMakeFiles/opencv_model_diagnostics.dir/build.make:95: recipe for target 'bin/opencv_model_diagnostics' failed
make[2]: *** [bin/opencv_model_diagnostics] Error 1
CMakeFiles/Makefile2:3183: recipe for target 'apps/model-diagnostics/CMakeFiles/opencv_model_diagnostics.dir/all' failed
make[1]: *** [apps/model-diagnostics/CMakeFiles/opencv_model_diagnostics.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

解决：
打开opencv源码目录，编辑文件 vim 3rdparty/libpng/pngpriv.h
第130行注释掉， 修改为131行

 130 /* #  if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \ */
 131 # if defined(PNG_ARM_NEON) && (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \
 132    defined(PNG_ALIGNED_MEMORY_SUPPORTED)
 133 #     define PNG_ARM_NEON_OPT 2
 134 #  else
 135 #     define PNG_ARM_NEON_OPT 0
 136 #  endif
 137 #endif