Multiple installed versions

[flohoff]

Hi,
libosmium seems to required a newer libprotozero as there is in Debian/Stretch. So cloning protozero to the directory solved the issue. But only half way. If libprotozero-dev from Stretch is installed it gets priority over the locally cloned and the build fails (Or the required version).

It seems the included cmake/FindProtozero.cmake is not capable of searching all possible locations to satisfy the required version. It prefers /usr/include/protozero over ../protozero/ although /usr/include does not satisfy the REQUIRED version.

Flo

[daniel-j-h]

I hit this issue a while back (and pinged you @joto about it) but I think I solved it passing -DPROTOZERO_INCLUDE_DIR= to the cmake invocation .. 🤔

[joto]

@flohoff I recommend using backports for stretch which will give you current protozero and libosmium.

Searching ../protozero is an ugly hack, not something the CMake config should do anyway. I should probably get rid of it. @daniel-j-h has the correct solution. Maybe there is a better way, but I don't know what it is.

[flohoff]

A better way than to search ../protozero would be ./protozero then people could use a git submodule.