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rtla: Add optional dependency on BPF tooling

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If tooling required for building BPF CO-RE skeletons is present (that
is, libbpf, clang with BPF CO-RE support, and bpftool), turn on
HAVE_BPF_SKEL flag.

Those requirements are similar to what perf requires, with the
difference of using system libbpf and bpftool instead of in-tree
versions.

rtla can be forcefully built without BPF skeleton support by setting
BUILD_BPF_SKEL=0 manually; in that case, a warning is displayed.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Link: https://lore.kernel.org/20250218145859.27762-4-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Tomas Glozar 2025-02-18 15:58:54 +01:00 committed by Steven Rostedt (Google)
parent 8a635c3856
commit 9dc3766ed0
2 changed files with 48 additions and 0 deletions
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6
tools/tracing/rtla/Makefile
View File

@ -33,9 +33,15 @@ DOCSRC := ../../../Documentation/tools/rtla/
FEATURE_TESTS := libtraceevent
FEATURE_TESTS += libtracefs
FEATURE_TESTS += libcpupower
FEATURE_TESTS += libbpf
FEATURE_TESTS += clang-bpf-co-re
FEATURE_TESTS += bpftool-skeletons
FEATURE_DISPLAY := libtraceevent
FEATURE_DISPLAY += libtracefs
FEATURE_DISPLAY += libcpupower
FEATURE_DISPLAY += libbpf
FEATURE_DISPLAY += clang-bpf-co-re
FEATURE_DISPLAY += bpftool-skeletons
ifeq ($(V),1)
Q =

42
tools/tracing/rtla/Makefile.config
View File

@ -53,6 +53,48 @@ else
$(info Please install libcpupower-dev/kernel-tools-libs-devel)
endif
ifndef BUILD_BPF_SKEL
# BPF skeletons are used to implement improved sample collection, enable
# them by default.
BUILD_BPF_SKEL := 1
endif
ifeq ($(BUILD_BPF_SKEL),0)
$(info BPF skeleton support disabled, building without BPF skeleton support.)
endif
$(call feature_check,libbpf)
ifeq ($(feature-libbpf), 1)
$(call detected,CONFIG_LIBBPF)
else
$(info libbpf is missing, building without BPF skeleton support.)
$(info Please install libbpf-dev/libbpf-devel)
BUILD_BPF_SKEL := 0
endif
$(call feature_check,clang-bpf-co-re)
ifeq ($(feature-clang-bpf-co-re), 1)
$(call detected,CONFIG_CLANG_BPF_CO_RE)
else
$(info clang is missing or does not support BPF CO-RE, building without BPF skeleton support.)
$(info Please install clang)
BUILD_BPF_SKEL := 0
endif
$(call feature_check,bpftool-skeletons)
ifeq ($(feature-bpftool-skeletons), 1)
$(call detected,CONFIG_BPFTOOL_SKELETONS)
else
$(info bpftool is missing or not supporting skeletons, building without BPF skeleton support.)
$(info Please install bpftool)
BUILD_BPF_SKEL := 0
endif
ifeq ($(BUILD_BPF_SKEL),1)
CFLAGS += -DHAVE_BPF_SKEL
EXTLIBS += -lbpf
endif
ifeq ($(STOP_ERROR),1)
$(error Please, check the errors above.)
endif