CC=gcc
CFLAGS=-O2 
LDFLAGS=-lm -lgmp -lz


IS_CC_GCC=$(shell $(CC) --version 2>/dev/null | grep -Eic 'gcc')
IS_CC_CLANG=$(shell $(CC) --version | grep -Eic '(llvm|clang)') 
IS_CC_ICC=$(shell $(CC) --version | grep -Eic 'Intel')


ifneq ($(IS_CC_GCC), 0)
# compiler is GCC
		CFLAGS+=-fopenmp
else
ifneq ($(IS_CC_CLANG), 0)
# compiler is CLANG
		LDFLAGS+=-lomp
else 
ifneq($(IS_CC_ICC), 0)
# compiler is Intel icc
			CFLAGS+=-qopenmp
endif
endif


all: reducibility_complexity

clean:
	rm -f reducibility_complexity

reducibility: reducibility_complexity.c
	$(CC) $(CFLAGS) $(LDFLAGS)  reducibility_complexity.c  -o  reducibility_complexity