perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available

During the transition to libbpf 1.0 some functions that perf used were
deprecated and finally removed from libbpf, so bpf_program__set_insns()
was introduced for perf to continue to use its bpf loader.

But when build with LIBBPF_DYNAMIC=1 we now need to check if that
function is available so that perf can build with older libbpf versions,
even if the end result is emitting a warning to the user that the use
of the perf BPF loader requires a newer libbpf, since bpf_program__set_insns()
touches libbpf objects internal state.

This affects only 'perf trace' when using bpf C code or pre-compiled
bytecode as an event.

Noticed on RHEL9, that has libbpf 0.7.0, where bpf_program__set_insns()
isn't available.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 6fd4b1384b97..898226ea8cad 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -588,6 +588,10 @@ ifndef NO_LIBELF
           ifeq ($(feature-libbpf-bpf_object__next_map), 1)
             CFLAGS += -DHAVE_LIBBPF_BPF_OBJECT__NEXT_MAP
           endif
+          $(call feature_check,libbpf-bpf_program__set_insns)
+          ifeq ($(feature-libbpf-bpf_program__set_insns), 1)
+            CFLAGS += -DHAVE_LIBBPF_BPF_PROGRAM__SET_INSNS
+          endif
           $(call feature_check,libbpf-btf__raw_data)
           ifeq ($(feature-libbpf-btf__raw_data), 1)
             CFLAGS += -DHAVE_LIBBPF_BTF__RAW_DATA
@@ -604,6 +608,7 @@ ifndef NO_LIBELF
         CFLAGS += -DHAVE_LIBBPF_BPF_PROG_LOAD
         CFLAGS += -DHAVE_LIBBPF_BPF_OBJECT__NEXT_PROGRAM
         CFLAGS += -DHAVE_LIBBPF_BPF_OBJECT__NEXT_MAP
+        CFLAGS += -DHAVE_LIBBPF_BPF_PROGRAM__SET_INSNS
         CFLAGS += -DHAVE_LIBBPF_BTF__RAW_DATA
         CFLAGS += -DHAVE_LIBBPF_BPF_MAP_CREATE
       endif