Arch Linux

Hi, thanks for adding bpftrace to the community repo.

> Description:

It looks like bpftrace is built without libbpf (see bpftrace --info
output below).

Without libbpf, bpftrace is unable to take advantage of BTF in the
kernel. BTF is really powerful b/c bpftrace can automatically extract
struct definitions from the kernel instead of the user having to
install kernel development headers and #include header files. It
also enables the faster and more efficient kfunc/kretfunc probes.

BTF was added to the arch kernel in https://bugs.archlinux.org/task/66260 .

>
> Additional info:
> * package version(s)

$ pacman -Qi bpftrace
Name : bpftrace
Version : 0.11.0-2
Description : High-level tracing language for Linux eBPF
Architecture : x86_64
URL : https://github.com/iovisor/bpftrace
Licenses : Apache
Groups : None
Provides : None
Depends On : libelf zlib llvm-libs clang bcc
Optional Deps : libbpf: BTF support - required at compile time [installed]
Required By : None
Optional For : None
Conflicts With : None
Replaces : None
Installed Size : 3.74 MiB
Packager : Anatol Pomozov <anatol.pomozov@gmail.com>
Build Date : Sun 11 Oct 2020 08:39:17 PM PDT
Install Date : Mon 12 Oct 2020 12:17:43 PM PDT
Install Reason : Explicitly installed
Install Script : No
Validated By : Signatur

> * config and/or log files etc.

$ sudo bpftrace --info
System
OS: Linux 5.8.14-arch1-1 #1 SMP PREEMPT Wed, 07 Oct 2020 23:59:46 +0000
Arch: x86_64
[...]
libbpf: no
libbpf btf dump: no
libbpf btf dump type decl: no
[...]

> * link to upstream bug report, if any

> Steps to reproduce:

$ sudo bpftrace --info 2>&1 | grep btf:
btf: no