tetragon

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SHELL=/bin/bash # needed for the *.{o,ll,i,s} pattern in the clean target
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CLANG  ?= clang
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LLC    ?= llc
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# Build the BPF programs for the detected architecture, default to x86, and
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# allow easy overriding by using ?= for cross-compilation
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UNAME_M := $(shell uname -m)
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ifeq ($(UNAME_M),x86_64)
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	BPF_TARGET_ARCH ?= x86
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endif
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ifeq ($(UNAME_M),aarch64)
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	BPF_TARGET_ARCH ?= arm64
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endif
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BPF_TARGET_ARCH ?= x86
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ROOT_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
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IDIR = $(ROOT_DIR)include/
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LIBBPF = $(ROOT_DIR)libbpf/
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LDIR = $(ROOT_DIR)lib
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DEPS = $(patsubst %,$(IDIR)/%,$(_DEPS))
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FLAGS := -I$(ROOT_DIR) \
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	 -Wall -Werror \
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	 -Wno-address-of-packed-member -Wno-compare-distinct-pointer-types -Wno-unknown-warning-option \
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	 -O2
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DEBUG ?= 0
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ifeq ($(DEBUG),1)
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	__DEBUG_FLAGS = -DTETRAGON_BPF_DEBUG
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endif
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CLANG_FLAGS += $(FLAGS) -I $(LIBBPF) -I $(IDIR) -I $(LDIR) -target bpf -emit-llvm -g -D__TARGET_ARCH_$(BPF_TARGET_ARCH) -fdebug-default-version=4 $(__DEBUG_FLAGS)
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LLC_FLAGS   := -march=bpf -mcpu=v2 -mattr=dwarfris
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LLC_FLAGS_ALU32 := -march=bpf -mcpu=v3 -mattr=dwarfris
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