PREFIX ?= /usr/local
LIBDIR ?= /lib

CFLAGS = -Wunused-variable -Wunused-function -I include

ifeq "$(DEBUG)" "1"
CFLAGS += -Og -g
else
CFLAGS += -O2
endif

all: build/libmaxint.a build/libmaxint.so build/test

clean:
	rm -rf build

build:
	mkdir build

build/libmaxint.a: src/maxint.c include/maxint.h libmaxint.api | build
	$(CC) -o build/tmp.o $< $(CFLAGS) -r
	objcopy --keep-global-symbols=libmaxint.api build/tmp.o build/fixed.o
	ar rcs $@ build/fixed.o

build/libmaxint.so: src/maxint.c include/maxint.h libmaxint.lds | build
	$(CC) -o $@ $< -fPIC $(CFLAGS) -shared -Wl,-version-script libmaxint.lds

build/test: src/test.c build/libmaxint.a | build
	$(CC) -o $@ $^ -g -I include

install:
	install -m755 build/libmaxint.a -t "$(DESTDIR)$(PREFIX)$(LIBDIR)"
	install -m755 build/libmaxint.so -t "$(DESTDIR)$(PREFIX)$(LIBDIR)"

uninstall:
	rm -f "$(DESTDIR)$(PREFIX)$(LIBDIR)/libmaxint.a"
	rm -f "$(DESTDIR)$(PREFIX)$(LIBDIR)/libmaxint.so"

.PHONY: all clean install uninstall