Makefile

CXX      := g++
CXXFLAGS := -std=c++20 -O3 -DNDEBUG -march=native -mtune=native -pipe -pthread
INCLUDES := -Iinclude

LIB_SRC  := src/level.cpp src/order_book.cpp src/order_pool.cpp
LIB_OBJ  := $(LIB_SRC:src/%.cpp=build/%.o)
LIB      := build/liborderbook.a

BENCH_SRC := bench/main.cpp
BENCH_OBJ := build/main.o
BENCH     := orderbook

PERF_EVENTS := cycles,instructions,cache-references,cache-misses,branches,branch-misses

# Default: build the bench binary and run perf counters on it
all: perf

# Library

$(LIB): $(LIB_OBJ)
	ar rcs $@ $^

build/%.o: src/%.cpp
	@mkdir -p build
	$(CXX) $(CXXFLAGS) $(INCLUDES) -c $< -o $@

# Bench

$(BENCH_OBJ): $(BENCH_SRC)
	@mkdir -p build
	$(CXX) $(CXXFLAGS) $(INCLUDES) -c $< -o $@

$(BENCH): $(BENCH_OBJ) $(LIB)
	$(CXX) $(CXXFLAGS) $(BENCH_OBJ) $(LIB) -o $@

# Convenience

lib: $(LIB)

run: $(BENCH)
	./$(BENCH)

perf: $(BENCH)
	@command -v perf >/dev/null 2>&1 || { echo "perf is not installed. Run: make run"; exit 1; }
	perf stat -e $(PERF_EVENTS) ./$(BENCH)

clean:
	rm -rf build $(BENCH)

.PHONY: all lib run perf clean