# 
# Makefile for QR Code generator (C++)
# 
# Copyright (c) Project Nayuki. (MIT License)
# https://www.nayuki.io/page/qr-code-generator-library
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
# - The above copyright notice and this permission notice shall be included in
#   all copies or substantial portions of the Software.
# - The Software is provided "as is", without warranty of any kind, express or
#   implied, including but not limited to the warranties of merchantability,
#   fitness for a particular purpose and noninfringement. In no event shall the
#   authors or copyright holders be liable for any claim, damages or other
#   liability, whether in an action of contract, tort or otherwise, arising from,
#   out of or in connection with the Software or the use or other dealings in the
#   Software.
# 


# ---- Configuration options ----

# External/implicit variables:
# - CXX: The C++ compiler, such as g++ or clang++.
# - CXXFLAGS: Any extra user-specified compiler flags (can be blank).


# ---- Controlling make ----

# Clear default suffix rules
.SUFFIXES:

# Don't delete object files
.SECONDARY:

# Stuff concerning goals
.DEFAULT_GOAL = all
.PHONY: all clean


# ---- Targets to build ----

LIB = qrcodegencpp
LIBFILE = lib$(LIB).so
ARFILE = lib$(LIB).a
SO_NAME = $(LIBFILE).1
REAL_NAME = $(LIBFILE).$(VERSION)
HEADERS = BitBuffer.hpp QrCode.hpp QrSegment.hpp
LIBOBJ = BitBuffer.o QrCode.o QrSegment.o
MAINS = QrCodeGeneratorDemo QrCodeGeneratorWorker

MULTIARCH ?= $(shell $(CC) --print-multiarch)

INCLUDEDIR ?= $(DESTDIR)/usr/include/qrcodegen
LIBDIR ?= $(DESTDIR)/usr/lib/$(MULTIARCH)

# Build all binaries
all: $(LIBFILE) $(ARFILE) $(MAINS)

# Delete build output
clean:
	rm -f -- $(LIBOBJ) $(LIBFILE) $(ARFILE) $(MAINS:=.o) $(MAINS)
	rm -rf .deps

install-shared: $(LIBFILE)
	install -d $(LIBDIR) || true
	install -m 0644 $(LIBFILE) $(LIBDIR)/$(REAL_NAME)
	rm -f $(LIBDIR)/$(SO_NAME)
	ln -s $(REAL_NAME) $(LIBDIR)/$(SO_NAME)
	rm -f $(LIBDIR)/$(LIBFILE)
	ln -s $(SO_NAME) $(LIBDIR)/$(LIBFILE)

install-static: $(ARFILE)
	install -d $(LIBDIR) || true
	install -m 0644 $(ARFILE) $(LIBDIR)/$(ARFILE)

install-header: $(HEADERS)
	install -d $(INCLUDEDIR) || true
	install -m 0644 $(HEADERS) $(INCLUDEDIR)/

install: install-shared install-static install-header

# Executable files
%: %.o $(LIBFILE)
	$(CXX) $(CXXFLAGS) -o $@ $< -L . -l $(LIB)

# The library
$(ARFILE): $(LIBOBJ)
	$(AR) -crs $@ -- $^

$(LIBFILE): $(LIBOBJ)
	$(CXX) -shared -Wl,-soname,$(SO_NAME) $(LDFLAGS) -o $@ $^

# Object files
%.o: %.cpp .deps/timestamp
	$(CXX) $(CXXFLAGS) -fPIC -c -o $@ -MMD -MF .deps/$*.d $<

# Have a place to store header dependencies automatically generated by compiler
.deps/timestamp:
	mkdir -p .deps
	touch .deps/timestamp

# Make use of said dependencies if available
-include .deps/*.d
