fatal error: opencv2/core/cvdef.h: 沒有此一檔案或目錄

原文鏈接：https://blog.csdn.net/finded/article/details/50478779?utm_source=blogxgwz9

一勞永逸的解決辦法是添加include的搜索路徑,
在~/.bashrc中添加以下兩行:

CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:/home/appleyuchi/opencv/include/opencv4/
C_INCLUDE_PATH=$C_INCLUDE_PATH:/home/appleyuchi/opencv/include/opencv4/