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
2.8 KiB
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)bootstrap/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) CFLAGS += $(EXTRA_CFLAGS) LDFLAGS += $(EXTRA_LDFLAGS) LDLIBS += -lelf -lz
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) $(LDFLAGS) $^ $(LDLIBS) -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): | $(BPFTOOL_OUTPUT) $(Q)$(MAKE) $(submake_extras) -C ../bpftool OUTPUT=$(BPFTOOL_OUTPUT) bootstrap