linux/tools
Arnaldo Carvalho de Melo 14292a4ae1 perf bpf: Avoid build breakage with libbpf < 0.8.0 + LIBBPF_DYNAMIC=1
In 746bd29e34 ("perf build: Use tools/lib headers from install
path") we stopped having the tools/lib/ directory from the kernel
sources in the header include path unconditionally, which breaks the
build on systems with older versions of libbpf-devel, in this case 0.7.0
as some of the structures and function declarations present in the newer
version of libbpf included in the kernel sources (tools/lib/bpf) are not
anymore used, just the ones in the system libbpf.

So instead of trying to provide alternative functions when the
libbpf-bpf_program__set_insns feature test fails, fail a
LIBBPF_DYNAMIC=1 build (requesting the use of the system's libbpf) and
emit this build error message:

  $ make LIBBPF_DYNAMIC=1 -C tools/perf
  Makefile.config:593: *** Error: libbpf devel library needs to be >= 0.8.0 to build with LIBBPF_DYNAMIC, update or build statically with the version that comes with the kernel sources.  Stop.
  $

For v6.3 these tests will be revamped and we'll require libbpf 1.0 as a
minimal version for using LIBBPF_DYNAMIC=1, most distros should have it
by now or at v6.3 time.

Fixes: 746bd29e34 ("perf build: Use tools/lib headers from install path")
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/CAP-5=fVa51_URGsdDFVTzpyGmdDRj_Dj2EKPuDHNQ0BYgMSzUA@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-01-10 12:11:09 -03:00
..
accounting tools/accounting/procacct: remove some unused variables 2022-11-18 13:55:09 -08:00
arch perf tools fixes and improvements for v6.2: 2nd batch 2022-12-22 11:07:29 -08:00
bootconfig
bpf bpftool: Fix linkage with statically built libllvm 2022-12-22 20:09:43 +01:00
build
certs
cgroup
counter
debugging
edid
firewire
firmware
gpio
hv
iio
include tools headers UAPI: Sync linux/kvm.h with the kernel sources 2022-12-20 15:15:57 -03:00
io_uring
kvm/kvm_stat
laptop
leds
lib libperf: Fix install_pkgconfig target 2022-12-16 10:04:06 -03:00
memory-model
objtool powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
pci
pcmcia
perf perf bpf: Avoid build breakage with libbpf < 0.8.0 + LIBBPF_DYNAMIC=1 2023-01-10 12:11:09 -03:00
power ACPI updates for 6.2-rc1 2022-12-12 13:38:17 -08:00
rcu
scripts
spi
testing memblock: small fixes in kernel-doc and tests 2023-01-08 02:54:24 -08:00
thermal
time
tracing rtla: Fix exit status when returning from calls to usage() 2022-12-09 18:06:24 -05:00
usb
verification Tracing fix for 6.2: 2022-12-21 19:03:42 -08:00
virtio tools/virtio: remove smp_read_barrier_depends() 2022-12-28 05:28:11 -05:00
vm MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
wmi
Makefile