undefined reference to `png_init_filter_functions_neon'

参考:
https://sourceforge.net/p/libpng/bugs/230/
https://github.com/opencv/opencv/issues/7600

报错:
undefined reference to `png_init_filter_functions_neon'
交叉编译 opencv3.3.1 ffmpeg libpng

修改
${HOME}/opencv-3.3.1/3rdparty/libpng/pngpriv.h

 128 /*#  if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \*/
 129 #   if defined(PNG_ARM_NEON) && (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \


你可能感兴趣的:(opencv)