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Comment by AlbertoGP | Hacker News Reader

Coincidentally I was trying to compile this yesterday and it failed because it did not find the RTMIDI library, which INSTALL.md says is optional: “RtMidi/ALSA (optional, for Linux MIDI support)”.

The machine I’m using does not have that library nor any convenient way of installing it right this moment, so I just moved on. I don’t know whether there will be further snags.

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I just had a quick look at the CMakeLists.txt file on github and I see "find_package(RTMIDI "2.1.0" REQUIRED)" - maybe removing the REQUIRED would solve your issue?

Thanks, after doing that it still fails in the same way as when installing RTMIDI from source:

    CMake Error at cmake/FindRTMIDI.cmake:51 (string):
      string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
      command.

I’ll see if I find some way of either compiling this one, or finding another one that does.

I guess they assume people gonna compile that on normal linux box

I went ahead and compiled and installed the current version of RTMIDI, and now it fails with something else that looks like some file is not compatible with current CMake:

    CMake Error at cmake/FindRTMIDI.cmake:51 (string):
      string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
      command.

There might be issues even with normal linux boxes, just because of bit rot.

Oh yeah, that's bad. I guess that's why you want tests running from time to time on <current stable> even if the software itself doesn't change.

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