mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-28 00:19:36 +00:00
9dc3766ed0
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>
101 lines
2.9 KiB
Makefile
101 lines
2.9 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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STOP_ERROR :=
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LIBTRACEEVENT_MIN_VERSION = 1.5
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LIBTRACEFS_MIN_VERSION = 1.6
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define lib_setup
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$(eval LIB_INCLUDES += $(shell sh -c "$(PKG_CONFIG) --cflags lib$(1)"))
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$(eval LDFLAGS += $(shell sh -c "$(PKG_CONFIG) --libs-only-L lib$(1)"))
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$(eval EXTLIBS += $(shell sh -c "$(PKG_CONFIG) --libs-only-l lib$(1)"))
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endef
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$(call feature_check,libtraceevent)
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ifeq ($(feature-libtraceevent), 1)
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$(call detected,CONFIG_LIBTRACEEVENT)
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TEST = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 && echo y || echo n")
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ifeq ($(TEST),n)
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$(info libtraceevent version is too low, it must be at least $(LIBTRACEEVENT_MIN_VERSION))
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STOP_ERROR := 1
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endif
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$(call lib_setup,traceevent)
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else
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STOP_ERROR := 1
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$(info libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel)
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endif
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$(call feature_check,libtracefs)
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ifeq ($(feature-libtracefs), 1)
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$(call detected,CONFIG_LIBTRACEFS)
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TEST = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 && echo y || echo n")
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ifeq ($(TEST),n)
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$(info libtracefs version is too low, it must be at least $(LIBTRACEFS_MIN_VERSION))
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STOP_ERROR := 1
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endif
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$(call lib_setup,tracefs)
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else
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STOP_ERROR := 1
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$(info libtracefs is missing. Please install libtracefs-dev/libtracefs-devel)
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endif
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$(call feature_check,libcpupower)
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ifeq ($(feature-libcpupower), 1)
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$(call detected,CONFIG_LIBCPUPOWER)
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CFLAGS += -DHAVE_LIBCPUPOWER_SUPPORT
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EXTLIBS += -lcpupower
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else
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$(info libcpupower is missing, building without --deepest-idle-state support.)
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$(info Please install libcpupower-dev/kernel-tools-libs-devel)
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endif
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ifndef BUILD_BPF_SKEL
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# BPF skeletons are used to implement improved sample collection, enable
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# them by default.
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BUILD_BPF_SKEL := 1
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endif
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ifeq ($(BUILD_BPF_SKEL),0)
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$(info BPF skeleton support disabled, building without BPF skeleton support.)
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endif
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$(call feature_check,libbpf)
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ifeq ($(feature-libbpf), 1)
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$(call detected,CONFIG_LIBBPF)
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else
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$(info libbpf is missing, building without BPF skeleton support.)
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$(info Please install libbpf-dev/libbpf-devel)
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BUILD_BPF_SKEL := 0
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endif
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$(call feature_check,clang-bpf-co-re)
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ifeq ($(feature-clang-bpf-co-re), 1)
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$(call detected,CONFIG_CLANG_BPF_CO_RE)
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else
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$(info clang is missing or does not support BPF CO-RE, building without BPF skeleton support.)
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$(info Please install clang)
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BUILD_BPF_SKEL := 0
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endif
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$(call feature_check,bpftool-skeletons)
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ifeq ($(feature-bpftool-skeletons), 1)
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$(call detected,CONFIG_BPFTOOL_SKELETONS)
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else
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$(info bpftool is missing or not supporting skeletons, building without BPF skeleton support.)
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$(info Please install bpftool)
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BUILD_BPF_SKEL := 0
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endif
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ifeq ($(BUILD_BPF_SKEL),1)
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CFLAGS += -DHAVE_BPF_SKEL
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EXTLIBS += -lbpf
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endif
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ifeq ($(STOP_ERROR),1)
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$(error Please, check the errors above.)
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endif
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