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f86601c366
Actually use previously defined LDFLAGS during build and add support for
LDLIBS to link extra standalone libraries e.g. 'argp' which is not provided
by musl libc.
Fixes: 585bf4640e ("tools: runqslower: Add EXTRA_CFLAGS and EXTRA_LDFLAGS support")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/bpf/20240723003045.2273499-1-tony.ambardar@gmail.com
94 lines
2.8 KiB
Makefile
94 lines
2.8 KiB
Makefile
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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include ../../scripts/Makefile.include
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OUTPUT ?= $(abspath .output)/
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BPFTOOL_OUTPUT := $(OUTPUT)bpftool/
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DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bootstrap/bpftool
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BPFTOOL ?= $(DEFAULT_BPFTOOL)
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LIBBPF_SRC := $(abspath ../../lib/bpf)
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BPFOBJ_OUTPUT := $(OUTPUT)libbpf/
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BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a
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BPF_DESTDIR := $(BPFOBJ_OUTPUT)
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BPF_INCLUDE := $(BPF_DESTDIR)/include
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INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../include/uapi)
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CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS)
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CFLAGS += $(EXTRA_CFLAGS)
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LDFLAGS += $(EXTRA_LDFLAGS)
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LDLIBS += -lelf -lz
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# Try to detect best kernel BTF source
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KERNEL_REL := $(shell uname -r)
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VMLINUX_BTF_PATHS := $(if $(O),$(O)/vmlinux) \
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$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \
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../../../vmlinux /sys/kernel/btf/vmlinux \
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/boot/vmlinux-$(KERNEL_REL)
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VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firstword \
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$(wildcard $(VMLINUX_BTF_PATHS))))
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ifeq ($(V),1)
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Q =
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else
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Q = @
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MAKEFLAGS += --no-print-directory
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submake_extras := feature_display=0
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endif
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.DELETE_ON_ERROR:
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.PHONY: all clean runqslower libbpf_hdrs
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all: runqslower
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runqslower: $(OUTPUT)/runqslower
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clean:
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$(call QUIET_CLEAN, runqslower)
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$(Q)$(RM) -r $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT)
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$(Q)$(RM) $(OUTPUT)*.o $(OUTPUT)*.d
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$(Q)$(RM) $(OUTPUT)*.skel.h $(OUTPUT)vmlinux.h
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$(Q)$(RM) $(OUTPUT)runqslower
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$(Q)$(RM) -r .output
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libbpf_hdrs: $(BPFOBJ)
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$(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $(BPFOBJ)
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
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$(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)/runqslower.skel.h \
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$(OUTPUT)/runqslower.bpf.o | libbpf_hdrs
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$(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.h runqslower.h | libbpf_hdrs
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$(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)
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$(QUIET_GEN)$(BPFTOOL) gen skeleton $< > $@
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$(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPUT)
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$(QUIET_GEN)$(CLANG) -g -O2 --target=bpf $(INCLUDES) \
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-c $(filter %.c,$^) -o $@ && \
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$(LLVM_STRIP) -g $@
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$(OUTPUT)/%.o: %.c | $(OUTPUT)
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$(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@
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$(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT):
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$(QUIET_MKDIR)mkdir -p $@
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$(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(OUTPUT) $(BPFTOOL)
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ifeq ($(VMLINUX_H),)
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$(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ] ; then \
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echo "Couldn't find kernel BTF; set VMLINUX_BTF to" \
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"specify its location." >&2; \
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exit 1;\
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fi
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$(QUIET_GEN)$(BPFTOOL) btf dump file $(VMLINUX_BTF_PATH) format c > $@
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else
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$(Q)cp "$(VMLINUX_H)" $@
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endif
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$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(BPFOBJ_OUTPUT)
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$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(BPFOBJ_OUTPUT) \
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DESTDIR=$(BPFOBJ_OUTPUT) prefix= $(abspath $@) install_headers
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$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
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$(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT) bootstrap
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