11:50 <LW> I am check the build env,

11:50 <LW> How to check whether "--without-bpf " is configured for my stap?

11:50 <LW> is there any command can show the configure info?

12:16 <LW> how to check whether the bpf is enabled in stap?

13:29 <fche> stap -V should show

13:29 <fche> but also: which stapbpf will fail on a build without-bpf

13:30 <fche> ^LW

16:24 <LW> root@cy-test:~# stap -V

16:24 <LW> Systemtap translator/driver (version 4.2/0.165, non-git sources)

16:24 <LW> Copyright (C) 2005-2019 Red Hat, Inc. and others

16:24 <LW> This is free software; see the source for copying conditions.

16:24 <LW> tested kernel versions: 2.6.32 ... 5.4-rc6

16:24 <LW> enabled features: PYTHON2 NLS

16:24 <LW> root@cy-test:~#

16:25 <LW> root@cy-test:~# stapbpf

16:25 <LW> stapbpf: command not found

16:25 <LW> root@cy-test:~#

16:25 <fche> so that's a no :)

16:28 <LW> you means this stap not support bpf

16:28 <fche> correct

16:32 <LW> when do ./configure, what thins will be detected for BPF configuration? because i have two ubuntu 16.04 host, use same 4.2 source code, in one host,just need ./configure; make, but in the other host, i must use ./configure --wihtout-bpf

16:33 <fche> autoconf.ac tells parts of the story

16:34 <fche> <linux/bpf.h> is searched for BPF_PROG_TYPE_PERF_EVENT

16:34 <LW> if i not add --without-bpf, will encount build error.