GMP_DIR = /usr
GMP_INC = $(GMP_DIR)/include
GMP_LIB = $(GMP_DIR)/lib

CC = /usr/bin/gcc -O3 -Wall

LIBS = -L$(GMP_LIB)
INCS = -I. -I$(GMP_INC)

HEAD = $(INCS) $(LIBS)
TAIL = -lm -lgmp -lc

Ahack: hack.c
	$(CC) -o Ahack $(HEAD) hack.c $(TAIL)