| # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) |
| include ../../scripts/Makefile.include |
| |
| OUTPUT ?= $(abspath .output)/ |
| |
| BPFTOOL_OUTPUT := $(OUTPUT)bpftool/ |
| DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bpftool |
| BPFTOOL ?= $(DEFAULT_BPFTOOL) |
| LIBBPF_SRC := $(abspath ../../lib/bpf) |
| BPFOBJ_OUTPUT := $(OUTPUT)libbpf/ |
| BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a |
| BPF_DESTDIR := $(BPFOBJ_OUTPUT) |
| BPF_INCLUDE := $(BPF_DESTDIR)/include |
| INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../include/uapi) |
| CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS) |
| |
| # Try to detect best kernel BTF source |
| KERNEL_REL := $(shell uname -r) |
| VMLINUX_BTF_PATHS := $(if $(O),$(O)/vmlinux) \ |
| $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ |
| ../../../vmlinux /sys/kernel/btf/vmlinux \ |
| /boot/vmlinux-$(KERNEL_REL) |
| VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \ |
| $(wildcard $(VMLINUX_BTF_PATHS)))) |
| |
| ifeq ($(V),1) |
| Q = |
| else |
| Q = @ |
| MAKEFLAGS += --no-print-directory |
| submake_extras := feature_display=0 |
| endif |
| |
| .DELETE_ON_ERROR: |
| |
| .PHONY: all clean runqslower libbpf_hdrs |
| all: runqslower |
| |
| runqslower: $(OUTPUT)/runqslower |
| |
| clean: |
| $(call QUIET_CLEAN, runqslower) |
| $(Q)$(RM) -r $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT) |
| $(Q)$(RM) $(OUTPUT)*.o $(OUTPUT)*.d |
| $(Q)$(RM) $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h |
| $(Q)$(RM) $(OUTPUT)runqslower |
| $(Q)$(RM) -r .output |
| |
| libbpf_hdrs: $(BPFOBJ) |
| |
| $(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ) |
| $(QUIET_LINK)$(CC) $(CFLAGS) $^ -lelf -lz -o $@ |
| |
| $(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h \ |
| $(OUTPUT)/runqslower.bpf.o | libbpf_hdrs |
| |
| $(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.h runqslower.h | libbpf_hdrs |
| |
| $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL) |
| $(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@ |
| |
| $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT) |
| $(QUIET_GEN)$(CLANG) -g -O2 -target bpf $(INCLUDES) \ |
| -c $(filter %.c,$^) -o $@ && \ |
| $(LLVM_STRIP) -g $@ |
| |
| $(OUTPUT)/%.o: %.c | $(OUTPUT) |
| $(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@ |
| |
| $(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT): |
| $(QUIET_MKDIR)mkdir -p $@ |
| |
| $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL) |
| ifeq ($(VMLINUX_H),) |
| $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \ |
| echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \ |
| "specify its location." >&2; \ |
| exit 1;\ |
| fi |
| $(QUIET_GEN)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@ |
| else |
| $(Q)cp "$(VMLINUX_H)" $@ |
| endif |
| |
| $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(BPFOBJ_OUTPUT) |
| $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(BPFOBJ_OUTPUT) \ |
| DESTDIR=$(BPFOBJ_OUTPUT) prefix= $(abspath $@) install_headers |
| |
| $(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT) |
| $(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT) \ |
| ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) |