How to properly package newer library than available in repositories of the building OS

Creating AppImages
2

I figured it out.

flag LD_DEBUG appeared to be very useful

LD_DEBUG=libs ./AntiMicroX-x86_64_8.AppImage

According to logs:

     43623:	find library=libSDL2-2.0.so.0 [0]; searching
     43623:	 search path=/opt/ros/noetic/lib:/opt/ros/noetic/lib/x86_64-linux-gnu		(LD_LIBRARY_PATH)
     43623:	  trying file=/opt/ros/noetic/lib/libSDL2-2.0.so.0
     43623:	  trying file=/opt/ros/noetic/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
     43623:	 search path=/tmp/.mount_AntiMiUylmvM/usr/bin/../lib		(RUNPATH from file /tmp/.mount_AntiMiUylmvM/AppRun.wrapped)
     43623:	  trying file=/tmp/.mount_AntiMiUylmvM/usr/bin/../lib/libSDL2-2.0.so.0

It appeared that I marked wrong library, but even packing it with
--library=/usr/local/lib/libSDL2-2.0.so.0 did not help, because AppImage creator also packaged old library from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0 and used it.

I had to just manually replace old lib in system
sudo cp /usr/local/lib/libSDL2-2.0.so.0 /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
Now everything is packed properly, but I don’t like this solution.

I think --library should somehow manage this.

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