projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| edae34a3 LW |
1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | CLANG ?= clang | |
| 837a3d66 BT |
4 | SCRATCH_DIR := $(OUTPUT)/tools |
| 5 | BUILD_DIR := $(SCRATCH_DIR)/build | |
| 6 | BPFDIR := $(abspath ../../../lib/bpf) | |
| 7 | APIDIR := $(abspath ../../../include/uapi) | |
| 8 | ||
| edae34a3 LW |
9 | CCINCLUDE += -I../../bpf |
| 10 | CCINCLUDE += -I../../../../../usr/include/ | |
| 837a3d66 BT |
11 | CCINCLUDE += -I$(SCRATCH_DIR)/include |
| 12 | ||
| 13 | BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a | |
| 14 | ||
| 15 | MAKE_DIRS := $(BUILD_DIR)/libbpf | |
| 16 | $(MAKE_DIRS): | |
| 17 | mkdir -p $@ | |
| edae34a3 LW |
18 | |
| 19 | TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o | |
| 20 | all: $(TEST_CUSTOM_PROGS) | |
| 21 | ||
| 837a3d66 BT |
22 | # Get Clang's default includes on this system, as opposed to those seen by |
| 23 | # '-target bpf'. This fixes "missing" files on some architectures/distros, | |
| 24 | # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. | |
| 25 | # | |
| 26 | # Use '-idirafter': Don't interfere with include mechanics except where the | |
| 27 | # build would have failed anyways. | |
| 28 | define get_sys_includes | |
| 29 | $(shell $(1) $(2) -v -E - </dev/null 2>&1 \ | |
| 30 | | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ | |
| 31 | $(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') | |
| 32 | endef | |
| 33 | ||
| 34 | ifneq ($(CROSS_COMPILE),) | |
| 35 | CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%)) | |
| 36 | endif | |
| 37 | ||
| 38 | CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH)) | |
| 39 | ||
| 40 | $(TEST_CUSTOM_PROGS): $(BPFOBJ) | |
| 41 | $(CLANG) -O2 -target bpf -c $(@:.o=.c) $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@ | |
| 42 | ||
| 43 | $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ | |
| 44 | $(APIDIR)/linux/bpf.h \ | |
| 45 | | $(BUILD_DIR)/libbpf | |
| 46 | $(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ | |
| 47 | EXTRA_CFLAGS='-g -O0' \ | |
| 48 | DESTDIR=$(SCRATCH_DIR) prefix= all install_headers | |
| 49 | ||
| 50 | EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) | |
| edae34a3 | 51 |