After updating to LM 21 I get a fatal error short after starting compilation: atkmmconfig.h file not found.
This file is in /lib/x86_64-linux-gnu/atkmm-1.6/include. Where should it be? Any help is very much appreciated.
Heinrich
After large OS updates I sometimes need to rerun cmake to regenerate all the Makefiles.
Have you emptied your build folder before you started configuration and compilation?
Emptying the build folder was the game changer. Compiling works again (and faster than before). Many thanks to @Thanatomanic !
Is it a good advice to empty the build folder every time before compiling a new version?
Yes 