PORTAUDIOCFLAGS=$(shell pkg-config --cflags portaudiocpp)
PORTAUDIOLIBS=$(shell pkg-config --libs portaudiocpp)

CXX=clang++-14

ifeq ($(CXXFLAGS),)
#CXXFLAGS=-O0 -g -D_DEBUG
CXXFLAGS=-O2 -DNDEBUG
endif
CXXFLAGS+=-stdlib=libc++
CXXFLAGS+=-Wall -Wpedantic -gdwarf-4
CXXFLAGS+=-std=c++17 -fexceptions -Iexternal -fPIC
#-march=native -mtune=native # is not better for llvm
CC=clang
CFLAGS=-Wall -O2 -Iexternal

# libstdc++-8 doesn't have transform_reduce
#CXX=g++-8
#CXXFLAGS=-Wall -O2 -std=c++17 -nostdinc++ -I/usr/lib/llvm-7/include/c++/v1 -nodefaultlibs -lc++ -lc++abi -lm -lc -lgcc_s -lgcc
# -march=native -mtune=native # doesn't help for gcc

DESTDIR=/
PREFIX=/usr/bin

SONAME1=libfft.so
SONAME2=libfft.so.0
SONAME3=libfft.so.0.0.0

all: staticlib sharedlib tunerdemo testsuite

staticlib: fft.a

fft.a: fft.o util.o
	ar rcs $@ $^

sharedlib: $(SONAME3)

$(SONAME3): fft.o util.o
	$(CXX) $(CXXFLAGS) -shared -Wl,-soname,$(SONAME2) -o $@ $^

tunerdemo: audioio.o external/pa_ringbuffer.o util.o fft.o autocorrelation.o tuner.o tunerdemo.o
	$(CXX) $(CXXFLAGS) $(PORTAUDIOLIBS) -o $@ $^

testsuite: util.o fft.o autocorrelation.o tuner.o testsuite.o
	$(CXX) $(CXXFLAGS) -o $@ $^

fft.o: fft.cpp fft.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

autocorrelation.o: autocorrelation.cpp autocorrelation.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

tuner.o: tuner.cpp tuner.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

util.o: util.cpp util.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

audioio.o: audioio.cpp audioio.h
	$(CXX) $(CXXFLAGS) $(PORTAUDIOCFLAGS) -c -o $@ $<

external/pa_ringbuffer.o: external/pa_ringbuffer.c external/pa_ringbuffer.h
	$(CC) $(CFLAGS) -c -o $@ $<

testsuite.o: testsuite.cpp fft.h autocorrelation.h tuner.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

tunerdemo.o: tunerdemo.cpp fft.h autocorrelation.h tuner.h
	$(CXX) $(CXXFLAGS) -c -o $@ $<

test: testsuite
	./testsuite

install:
	mkdir -p $(DESTDIR)/$(PREFIX)
	install tunerdemo $(DESTDIR)/$(PREFIX)/tunerdemo
	mkdir -p $(DESTDIR)/usr/include
	install fft.h $(DESTDIR)/usr/include/fft.h
	mkdir -p $(DESTDIR)/usr/lib
	install $(SONAME3) $(DESTDIR)/usr/lib/$(SONAME3)
	ln -sf $(SONAME3) $(DESTDIR)/usr/lib/$(SONAME2)
	ln -sf $(SONAME2) $(DESTDIR)/usr/lib/$(SONAME1)

deb:
	dpkg-buildpackage -us -uc

clean:
	rm -f tunerdemo testsuite *.o external/*.o $(SONAME1) $(SONAME2) $(SONAME3) *.a

.PHONY: clean install all test staticlib sharedlib