ifeq ($(shell uname -s),Darwin)  # Mac.
CC = gcc-13
# To use actual GCC on Mac, please first install it.
else  # Linux
CC = gcc
endif

CFLAGS=-Wall -O3

matmul: matmul.c
	$(CC) -o matmul $(LDFLAGS) $(CFLAGS) matmul.c

clean:
	rm -f matmul *.o
