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I recently went through this problem with ubuntu 20.10 on a RPI4 and CM4 and even running GPIO -v simply SEGV's.. As long as you have the dependancies.. its simple enough to upgrade to WiringPI 2.6 which works.. #git clone #cd WiringPi #./build At which point root@ys:~/git/WiringPi# gpio -v gpio version: 2.60 Copyright (...

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