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ex_vrp

0.2.1
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Elixir bindings for PyVRP - a state-of-the-art vehicle routing problem solver

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ex_vrp Makefile
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Makefile 

# Makefile for ExVrp NIF compilation

#

# This Makefile is used by elixir_make to compile the C++ NIF.



# Erlang paths

ERTS_INCLUDE_DIR ?= $(shell erl -noshell -eval "io:format(\"~ts/erts-~ts/include/\", [code:root_dir(), erlang:system_info(version)])." -s init stop)

ERL_INTERFACE_INCLUDE_DIR ?= $(shell erl -noshell -eval "io:format(\"~ts\", [code:lib_dir(erl_interface, include)])." -s init stop)

ERL_INTERFACE_LIB_DIR ?= $(shell erl -noshell -eval "io:format(\"~ts\", [code:lib_dir(erl_interface, lib)])." -s init stop)



# Platform detection

UNAME_S := $(shell uname -s)

ifeq ($(UNAME_S),Darwin)

	LDFLAGS += -dynamiclib -undefined dynamic_lookup

	SO_EXT = so

else

	LDFLAGS += -shared

	SO_EXT = so

endif



# Compiler settings - use clang++ for sanitizers, otherwise default to g++

ifdef SANITIZE

CXX = clang++

else

CXX ?= g++

endif



# Base compiler flags

CXXFLAGS = -std=c++20 -Wall -Wextra -fPIC -fvisibility=hidden

CXXFLAGS += -I$(ERTS_INCLUDE_DIR)

CXXFLAGS += -Ic_src

CXXFLAGS += -Ic_src/pyvrp



# Sanitizer support (set SANITIZE=1 to enable)

# Use with: task test:asan

ifdef SANITIZE

# Debug build with sanitizers - no LTO, keep frame pointers

CXXFLAGS += -O1 -g -fno-omit-frame-pointer -fno-optimize-sibling-calls

CXXFLAGS += -fsanitize=address,undefined

CXXFLAGS += -fno-sanitize-recover=all

LDFLAGS += -fsanitize=address,undefined

# ASan requires shared runtime for NIFs

ifeq ($(UNAME_S),Linux)

LDFLAGS += -shared-libasan

endif

else

# Release build: optimized with LTO, disable assertions

CXXFLAGS += -O3 -flto -DNDEBUG

LDFLAGS += -flto

# Disable dangling-reference warning from PyVRP's Route.h (false positive in GCC 14)

# Only add for GCC, Clang doesn't have this warning

ifneq (,$(findstring g++,$(shell $(CXX) --version)))

CXXFLAGS += -Wno-dangling-reference

endif

endif



# Fine includes (use -isystem for angle-bracket includes like <fine.hpp>)

ifdef FINE_INCLUDE_DIR

CXXFLAGS += -isystem $(FINE_INCLUDE_DIR)

endif



# Output

PRIV_DIR = priv

NIF_SO = $(PRIV_DIR)/ex_vrp_nif.$(SO_EXT)



# Source files - NIF bindings

NIF_SRC = c_src/ex_vrp_nif.cpp



# PyVRP core sources (from latest main branch)

PYVRP_CORE_SRC = \

	c_src/pyvrp/CostEvaluator.cpp \

	c_src/pyvrp/DurationSegment.cpp \

	c_src/pyvrp/DynamicBitset.cpp \

	c_src/pyvrp/LoadSegment.cpp \

	c_src/pyvrp/ProblemData.cpp \

	c_src/pyvrp/RandomNumberGenerator.cpp \

	c_src/pyvrp/Route.cpp \

	c_src/pyvrp/Solution.cpp \

	c_src/pyvrp/Trip.cpp



# PyVRP search sources

PYVRP_SEARCH_SRC = \

	c_src/pyvrp/search/LocalSearch.cpp \

	c_src/pyvrp/search/PerturbationManager.cpp \

	c_src/pyvrp/search/RelocateWithDepot.cpp \

	c_src/pyvrp/search/Route.cpp \

	c_src/pyvrp/search/SearchSpace.cpp \

	c_src/pyvrp/search/Solution.cpp \

	c_src/pyvrp/search/SwapRoutes.cpp \

	c_src/pyvrp/search/SwapStar.cpp \

	c_src/pyvrp/search/SwapTails.cpp \

	c_src/pyvrp/search/primitives.cpp



ALL_SRC = $(NIF_SRC) $(PYVRP_CORE_SRC) $(PYVRP_SEARCH_SRC)



# Object files

OBJ_DIR = c_src/obj

OBJS = $(patsubst c_src/%.cpp,$(OBJ_DIR)/%.o,$(ALL_SRC))



all: $(PRIV_DIR) $(NIF_SO)



$(PRIV_DIR):

	mkdir -p $(PRIV_DIR)



# Create all object directories

$(OBJ_DIR)/%.o: c_src/%.cpp

	@mkdir -p $(dir $@)

	$(CXX) $(CXXFLAGS) -c -o $@ $<



$(NIF_SO): $(OBJS)

	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^



clean:

	rm -rf $(PRIV_DIR)/*.$(SO_EXT)

	rm -rf $(OBJ_DIR)



.PHONY: all clean