$brew install opencv
これでopencvが入る。
$brew list --versions | grep opencv opencv 2.4.13.2
バージョンが古かった
$brew upgrade opencv
upgradeするがいろいろエラーが起こる。
$brew rm opencv && brew install opencv Error: suite-sparse is already installed from homebrew/science! Please `brew uninstall suite-sparse` first."
一度消してinstallし直し。
$brew uninstall suite-sparse 1 ↵ Error: Refusing to uninstall /usr/local/Cellar/suite-sparse/4.5.3 because it is required by octave, which is currently installed. You can override this and force removal with: brew uninstall --ignore-dependencies suite-sparse
エラーメッセージに従う。
$brew uninstall --ignore-dependencies suite-sparse brew install opencv
$brew list --versions | grep opencv 1 ↵ opencv 4.3.0
インストールできた。
Cppの実行
$g++ main.cpp -o main.out `pkg-config --cflags opencv` `pkg-config --libs opencv` && ./main.out
Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc'
to the PKG_CONFIG_PATH environment variable
No package 'opencv' found
Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc'
to the PKG_CONFIG_PATH environment variable
No package 'opencv' found
main.cpp:7:10: fatal error: 'opencv2/opencv.hpp' file not found
#include "opencv2/opencv.hpp"
^~~~~~~~~~~~~~~~~~~~
1 error generated.
実行できない。
$sudo cp /usr/local/Cellar/opencv/4.3.0/lib/pkgconfig/opencv4.pc /usr/local/lib/pkgconfig/opencv.pc
pkgconfigにopencvをcopyする。
$echo `pkg-config --cflags opencv` -I/usr/local/Cellar/opencv/4.3.0/include/opencv4/opencv -I/usr/local/Cellar/opencv/4.3.0/include/opencv4
$ g++ -std=c++11 main.cpp -o main.out `pkg-config --cflags opencv` `pkg-config --libs opencv` && ./main.out
-std=c++11が必要。
参考
C++ - OpenCVのコンパイルエラー｜teratail https://teratail.com/questions/167878
