How do I install different openCV versions without conflict?

edit

one way to do that would be:

• do a static build : cmake -BUILD_SHARED_LIBS=OFF
• install that to some non-standard folder : cmake -DCMAKE_INSTALL_PREFIX=/app/ocv3

you'll have to explicitly specify your include and libs path when building your app later, but at least you can have as many different opencv versions as you want this way, without them ever interfering.

What does a static build do exactly? So the include would be something like this -> #include </app> ?

• the includes stay the same, like "opencv2/opencv.hpp". the include path would be like g++ -I/app/ocv3/include and link path like -L/app/ocv3/lib

So if I were to compile a basic program it would be something like this? --> g++ -I/app/ocv3/inlcude -L/app/ocv/lib pkg-config --libs --cflags opencv -o program program.cpp ?

no, not with pkg-config (that's kind of xor), more like :

g++ -I /app/ocv3/include -L /app/ocv3/lib -lopencv_imgcodecs -lopencv_imgproc -lopencv_core -ljpeg -lpng -lrt -ldl -lz -lpthread -o program program.cpp

(that's probably missing some imglibs)

Just a follow up. I did a static install and everything looks right. I do have a question though.

In the non standard library(/app/ocv3/lib) there is a pkg-config file that has been created. Is there anyway I can use this for a static program build instead of typing the entire library list?

sorry, idk.

No issues, thanks for your help again.