[09:14] <sub526> Hi all, while building the Ubuntu 20.04 kernel source , I noticed "Makefile:179: recipe for target 'sub-make' failed", full log is here: https://pastebin.com/fbbzauBf
[09:14] <sub526> Any suggestions?
[09:28] <juergh> sub526, there's probably an error somewhere further up in the log.
[09:30] <sub526> juergh: I am trying to build Ubuntu 20.04 kernel source from Ubuntu 16.04 PC with gcc version 5.4.0, is it possible? or do i need to update the gcc version?
[09:33] <juergh> sub526, dunno. what is the build error? what you pastebin'ed is just the end result but not the real built error.
[09:35] <juergh> sub526, you might just create a 20.04 chroot on your machine and build in there. but without seeing the real error it's impossible to tell if this is a gcc version issue.
[09:36] <sub526> juergh: is there a file which holds the complete build log?
[09:37] <juergh> sub526, no. you'd have build with something like '<your_build_command> 2>&1 | tee build.log'
[10:13] <sub526> juergh: build failed because "/bin/sh: 1: lz4c: not found"
[10:14] <sub526> sudo apt-get install liblz4-tool