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tools/runqslower: Enable out-of-tree build

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Enable out-of-tree build for runqslower. Only set OUTPUT=.output if it
wasn't already set by the user.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20201110164310.2600671-6-jean-philippe@linaro.org
This commit is contained in:
Jean-Philippe Brucker 2020-11-10 17:43:09 +01:00 committed by Andrii Nakryiko
parent 3290996e71
commit 85e59344d0
1 changed files with 18 additions and 14 deletions
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32
tools/bpf/runqslower/Makefile
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@ -1,15 +1,18 @@
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
include ../../scripts/Makefile.include
OUTPUT := .output
OUTPUT ?= $(abspath .output)/
CLANG ?= clang
LLC ?= llc
LLVM_STRIP ?= llvm-strip
DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
BPFTOOL_OUTPUT := $(OUTPUT)bpftool/
DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bpftool
BPFTOOL ?= $(DEFAULT_BPFTOOL)
LIBBPF_SRC := $(abspath ../../lib/bpf)
BPFOBJ := $(OUTPUT)/libbpf.a
BPF_INCLUDE := $(OUTPUT)
BPFOBJ_OUTPUT := $(OUTPUT)libbpf/
BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a
BPF_INCLUDE := $(BPFOBJ_OUTPUT)
INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../lib) \
-I$(abspath ../../include/uapi)
CFLAGS := -g -Wall
@ -20,7 +23,6 @@ VMLINUX_BTF_PATHS := /sys/kernel/btf/vmlinux /boot/vmlinux-$(KERNEL_REL)
VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \
$(wildcard $(VMLINUX_BTF_PATHS))))
abs_out := $(abspath $(OUTPUT))
ifeq ($(V),1)
Q =
else
@ -38,7 +40,11 @@ runqslower: $(OUTPUT)/runqslower
clean:
$(call QUIET_CLEAN, runqslower)
$(Q)rm -rf $(OUTPUT) 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
$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)
$(QUIET_LINK)$(CC) $(CFLAGS) $^ -lelf -lz -o $@
@ -59,8 +65,8 @@ $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)
$(OUTPUT)/%.o: %.c | $(OUTPUT)
$(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@
$(OUTPUT):
$(QUIET_MKDIR)mkdir -p $(OUTPUT)
$(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT):
$(QUIET_MKDIR)mkdir -p $@
$(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
$(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \
@ -70,10 +76,8 @@ $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
fi
$(QUIET_GEN)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) \
OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(BPFOBJ_OUTPUT)
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(BPFOBJ_OUTPUT) $@
$(DEFAULT_BPFTOOL):
$(Q)$(MAKE) $(submake_extras) -C ../bpftool \
prefix= OUTPUT=$(abs_out)/ DESTDIR=$(abs_out) install
$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
$(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT)