Makefile

UNAME := $(shell uname -s)

# ---- Compiler ---------------------------------------------------------------
ifeq ($(UNAME), Darwin)
  # Prefer CommandLineTools clang++ (does not require Xcode license).
  CLT_CLANG := /Library/Developer/CommandLineTools/usr/bin/clang++
  CLT_SDK   := /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
  ifneq ($(wildcard $(CLT_CLANG)),)
    CXX     := $(CLT_CLANG)
    SYSROOT := -isysroot $(CLT_SDK)
  else
    # Fall back to Xcode clang++ if CLT not installed.
    XCODE_CLANG := /Applications/Xcode.app/Contents/Developer/Toolchains/\
XcodeDefault.xctoolchain/usr/bin/clang++
    CXX     := $(XCODE_CLANG)
    SDK     := $(shell xcrun --sdk macosx --show-sdk-path 2>/dev/null)
    SYSROOT := $(if $(SDK),-isysroot $(SDK),)
  endif
else
  CXX     := g++
  SYSROOT :=
endif

# ---- Flags ------------------------------------------------------------------
CXXFLAGS := -std=c++20 -O3 -march=native -fno-omit-frame-pointer \
            -Wall -Wextra -Wpedantic \
            -pthread \
            $(SYSROOT) \
            -Iinclude

LDFLAGS  := $(SYSROOT) -pthread

# ---- Sources ----------------------------------------------------------------
CORE_SRCS := src/feed_order_book.cpp \
             src/seq_handler.cpp     \
             src/udp_socket.cpp      \
             src/feed_handler.cpp

CORE_OBJS  := $(CORE_SRCS:.cpp=.o)
SIM_OBJ    := src/simulator.o
BENCH_OBJ  := src/benchmark.o

# ---- Targets ----------------------------------------------------------------
.PHONY: all clean

all: feed_handler_sim feed_handler_bench

feed_handler_sim: $(CORE_OBJS) $(SIM_OBJ)
	$(CXX) $(CXXFLAGS) $^ $(LDFLAGS) -o $@

feed_handler_bench: $(CORE_OBJS) $(BENCH_OBJ)
	$(CXX) $(CXXFLAGS) $^ $(LDFLAGS) -o $@

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

clean:
	rm -f src/*.o feed_handler_sim feed_handler_bench

# ---- Quick smoke test -------------------------------------------------------
.PHONY: smoke
smoke: feed_handler_bench
	./feed_handler_bench