# PIE executable, dynamically loaded shared library, shared glibc
CC=gcc
CPPFLAGS=-U_DEFAULT_SOURCE
SO_CFLAGS=-Wall -Wextra -pedantic -std=c11 -m64 -march=x86-64 -mtune=generic -pipe -O3 -fPIC
CFLAGS=-Wall -Wextra -pedantic -std=c11 -m64 -march=x86-64 -mtune=generic -pipe -O3 -fPIE
SO_LDFLAGS=-fPIC
LDFLAGS=-pie
LIBS=-ldl

all:	program

program:	program.o libmodule.so
	$(CC) $(LDFLAGS) $< -o $@ $(LIBS)

program.o:	program.c output.h sum.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

libmodule.so:	output.o sum.o
	$(CC) $(SO_LDFLAGS) -shared -Wl,-soname,$@.1 -o $@.1.0 $^
	ln -sf $@.1.0 $@.1
	ln -sf $@.1 $@

output.o:	output.c output.h
	$(CC) $(CPPFLAGS) $(SO_CFLAGS) -c $< -o $@

sum.o:	sum.c sum.h
	$(CC) $(CPPFLAGS) $(SO_CFLAGS) -c $< -o $@

distclean:	clean
	$(RM) program libmodule.so.1.0 libmodule.so.1 libmodule.so

clean:
	$(RM) program.o output.o sum.o

.PHONY:	all distclean clean