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| author | Ian Rogers <irogers@google.com> | 2023-03-22 11:31:08 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-04-04 09:39:54 -0300 |
| commit | 1d7966547e11b1355f88086c26eb2086f6ea4770 (patch) | |
| tree | 05df3e18291d5cecefd444fc4e8eb29b829983a4 /tools/perf/Makefile.perf | |
| parent | 46d21ec067490ab9cdcc89b9de5aae28786a8b8e (diff) | |
| download | lwn-1d7966547e11b1355f88086c26eb2086f6ea4770.tar.gz lwn-1d7966547e11b1355f88086c26eb2086f6ea4770.zip | |
perf build: Add warning for when vmlinux.h generation fails
The warning advises on the NO_BPF_SKEL=1 option.
Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230322183108.1380882-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Makefile.perf')
| -rw-r--r-- | tools/perf/Makefile.perf | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index ed6b6a070f79..48aba186ceb5 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -1072,7 +1072,11 @@ VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) $(SKEL_OUT)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) ifeq ($(VMLINUX_H),) - $(QUIET_GEN)$(BPFTOOL) btf dump file $< format c > $@ + $(QUIET_GEN)$(BPFTOOL) btf dump file $< format c > $@ || \ + (echo "Failure to generate vmlinux.h needed for the recommended BPF skeleton support." && \ + echo "To disable this use the build option NO_BPF_SKEL=1." && \ + echo "Alternatively point at a pre-generated vmlinux.h with VMLINUX_H=<path>." && \ + false) else $(Q)cp "$(VMLINUX_H)" $@ endif |