> Am 18.07.2019 um 20:51 schrieb Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>: > > We should probably make a script with all the ways of calling make > should work. Otherwise we can lose track too easily. Thanks for the script! I’m trying to make it all pass now, and hitting a weird issue in the Kbuild case. The build prints "No rule to make target 'scripts/Makefile.ubsan.o'" and proceeds with an empty BPFTOOL_VERSION, which causes problems later on. I've found that this is caused by sub_make_done=1 environment variable, and unsetting it indeed fixes the problem, since the root Makefile no longer uses the implicit %.o rule. However, I wonder if that would be acceptable in the final version of the patch, and whether there is a cleaner way to achieve the same effect? Best regards, Ilya