[PATCH bpf-next v2 0/5] samples: bpf: fix build after move to full libbpf

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Hi!

Following patches address build issues after recent move to libbpf.
For out-of-tree builds we would see the following error:

gcc: error: samples/bpf/../../tools/lib/bpf/libbpf.a: No such file or directory

libbpf build system is now always invoked explicitly rather than
relying on building single objects most of the time.  We need to
resolve the friction between Kbuild and tools/ build system.

Mini-library called libbpf.h in samples is renamed to bpf_insn.h,
using linux/filter.h seems not completely trivial since some samples
get upset when order on include search path in changed.  We do have
to rename libbpf.h, however, because otherwise it's hard to reliably
get to libbpf's header in out-of-tree builds.

v2:
 - fix the build error harder (patch 3);
 - add patch 5 (make clang less noisy).

Jakub Kicinski (5):
  samples: bpf: include bpf/bpf.h instead of local libbpf.h
  samples: bpf: rename libbpf.h to bpf_insn.h
  samples: bpf: fix build after move to compiling full libbpf.a
  samples: bpf: move libbpf from object dependencies to libs
  samples: bpf: make the build less noisy

 samples/bpf/Makefile                          | 165 +++++++-----------
 samples/bpf/{libbpf.h => bpf_insn.h}          |   8 +-
 samples/bpf/bpf_load.c                        |   2 +-
 samples/bpf/bpf_load.h                        |   2 +-
 samples/bpf/cookie_uid_helper_example.c       |   2 +-
 samples/bpf/cpustat_user.c                    |   2 +-
 samples/bpf/fds_example.c                     |   4 +-
 samples/bpf/lathist_user.c                    |   2 +-
 samples/bpf/load_sock_ops.c                   |   2 +-
 samples/bpf/lwt_len_hist_user.c               |   2 +-
 samples/bpf/map_perf_test_user.c              |   2 +-
 samples/bpf/sock_example.c                    |   3 +-
 samples/bpf/sock_example.h                    |   1 -
 samples/bpf/sockex1_user.c                    |   2 +-
 samples/bpf/sockex2_user.c                    |   2 +-
 samples/bpf/sockex3_user.c                    |   2 +-
 samples/bpf/syscall_tp_user.c                 |   2 +-
 samples/bpf/tc_l2_redirect_user.c             |   2 +-
 samples/bpf/test_cgrp2_array_pin.c            |   2 +-
 samples/bpf/test_cgrp2_attach.c               |   3 +-
 samples/bpf/test_cgrp2_attach2.c              |   3 +-
 samples/bpf/test_cgrp2_sock.c                 |   3 +-
 samples/bpf/test_cgrp2_sock2.c                |   3 +-
 .../bpf/test_current_task_under_cgroup_user.c |   2 +-
 samples/bpf/test_lru_dist.c                   |   2 +-
 samples/bpf/test_map_in_map_user.c            |   2 +-
 samples/bpf/test_overhead_user.c              |   2 +-
 samples/bpf/test_probe_write_user_user.c      |   2 +-
 samples/bpf/trace_output_user.c               |   2 +-
 samples/bpf/tracex1_user.c                    |   2 +-
 samples/bpf/tracex2_user.c                    |   2 +-
 samples/bpf/tracex3_user.c                    |   2 +-
 samples/bpf/tracex4_user.c                    |   2 +-
 samples/bpf/tracex5_user.c                    |   2 +-
 samples/bpf/tracex6_user.c                    |   2 +-
 samples/bpf/tracex7_user.c                    |   2 +-
 samples/bpf/xdp_fwd_user.c                    |   2 +-
 samples/bpf/xdp_monitor_user.c                |   2 +-
 samples/bpf/xdp_redirect_cpu_user.c           |   2 +-
 samples/bpf/xdp_redirect_map_user.c           |   2 +-
 samples/bpf/xdp_redirect_user.c               |   2 +-
 samples/bpf/xdp_router_ipv4_user.c            |   2 +-
 samples/bpf/xdp_tx_iptunnel_user.c            |   2 +-
 samples/bpf/xdpsock_user.c                    |   2 +-
 44 files changed, 116 insertions(+), 147 deletions(-)
 rename samples/bpf/{libbpf.h => bpf_insn.h} (98%)

-- 
2.17.0