116 lines
2.8 KiB
Makefile
116 lines
2.8 KiB
Makefile
|
|
all:
|
|
.PHONY: help all clean
|
|
|
|
ifneq ($(V),1)
|
|
_@ :=@
|
|
endif
|
|
|
|
INC_DIRS ?=
|
|
SRC_DIR ?= ./src
|
|
OUT_DIR ?= ./out
|
|
|
|
OS=$(shell uname)
|
|
ifeq ($(OS),Darwin)
|
|
LLVM_DIR ?= $(shell brew --prefix llvm)
|
|
endif
|
|
|
|
ifdef LLVM_DIR
|
|
CC := $(LLVM_DIR)/bin/clang
|
|
LLC := $(LLVM_DIR)/bin/llc
|
|
OBJ_DUMP := $(LLVM_DIR)/bin/llvm-objdump
|
|
else
|
|
CC := clang-7
|
|
LLC := llc-7
|
|
OBJ_DUMP := llvm-objdump-7
|
|
endif
|
|
|
|
SYSTEM_INC_DIRS := -isystem $(dir $(lastword $(MAKEFILE_LIST)))inc
|
|
|
|
CC_FLAGS := \
|
|
-Werror \
|
|
-target bpf \
|
|
-O2 \
|
|
-emit-llvm \
|
|
-fno-builtin \
|
|
|
|
LLC_FLAGS := \
|
|
-march=bpf \
|
|
-filetype=obj \
|
|
|
|
OBJ_DUMP_FLAGS := \
|
|
-color \
|
|
-source \
|
|
-disassemble \
|
|
|
|
help:
|
|
@echo 'BPF Program makefile'
|
|
@echo ''
|
|
@echo 'This makefile will build BPF Programs from C source files into ELFs'
|
|
@echo ''
|
|
@echo 'Assumptions:'
|
|
@echo ' - Programs are a single .c source file (may include headers)'
|
|
@echo ' - Programs are located in the source directory: $(SRC_DIR)'
|
|
@echo ' - Programs are named by their basename (eg. file name:foo.c -> program name:foo)'
|
|
@echo ' - Output files will be placed in the directory: $(OUT_DIR)'
|
|
@echo ''
|
|
@echo 'User settings'
|
|
@echo ' - The following setting are overridable on the command line, default values shown:'
|
|
@echo ' - Show commands while building:'
|
|
@echo ' V=1'
|
|
@echo ' - List of include directories:'
|
|
@echo ' INC_DIRS=$(INC_DIRS)'
|
|
@echo ' - List of system include directories:'
|
|
@echo ' SYSTEM_INC_DIRS=$(SYSTEM_INC_DIRS)'
|
|
@echo ' - Location of source files:'
|
|
@echo ' SRC_DIR=$(SRC_DIR)'
|
|
@echo ' - Location to place output files:'
|
|
@echo ' OUT_DIR=$(OUT_DIR)'
|
|
@echo ' - Location of LLVM:'
|
|
@echo ' LLVM_DIR=$(LLVM_DIR)'
|
|
@echo ''
|
|
@echo 'Usage:'
|
|
@echo ' - make help - This help message'
|
|
@echo ' - make all - Builds all the programs in the directory: $(SRC_DIR)'
|
|
@echo ' - make clean - Cleans all programs'
|
|
@echo ' - make dump_<program name> - Dumps the contents of the program to stdout'
|
|
@echo ' - make <program name> - Build a single program by name'
|
|
@echo ''
|
|
@echo 'Available programs:'
|
|
$(foreach name, $(PROGRAM_NAMES), @echo ' - $(name)'$(\n))
|
|
@echo ''
|
|
@echo 'Example:'
|
|
@echo ' - Assuming a programed named foo (src/foo.c)'
|
|
@echo ' - make foo'
|
|
@echo ' - make dump_foo'
|
|
|
|
.PRECIOUS: $(OUT_DIR)/%.bc
|
|
$(OUT_DIR)/%.bc: $(SRC_DIR)/%.c
|
|
@echo "[cc] $@ ($<)"
|
|
$(_@)mkdir -p $(OUT_DIR)
|
|
$(_@)$(CC) $(CC_FLAGS) $(SYSTEM_INC_DIRS) $(INC_DIRS) -o $@ -c $< -MD -MF $(@:.bc=.d)
|
|
|
|
.PRECIOUS: $(OUT_DIR)/%.o
|
|
$(OUT_DIR)/%.o: $(OUT_DIR)/%.bc
|
|
@echo "[llc] $@ ($<)"
|
|
$(_@)$(LLC) $(LLC_FLAGS) -o $@ $<
|
|
|
|
-include $(wildcard $(OUT_DIR)/*.d)
|
|
|
|
PROGRAM_NAMES := $(notdir $(basename $(wildcard $(SRC_DIR)/*.c)))
|
|
|
|
define \n
|
|
|
|
|
|
endef
|
|
|
|
all: $(PROGRAM_NAMES)
|
|
|
|
%: $(addprefix $(OUT_DIR)/, %.o) ;
|
|
|
|
dump_%: %
|
|
$(_@)$(OBJ_DUMP) $(OBJ_DUMP_FLAGS) $(addprefix $(OUT_DIR)/, $(addsuffix .o, $<))
|
|
|
|
clean:
|
|
rm -rf $(OUT_DIR)
|