写一个简单的Makefile

all: osx
.PHONY: osx linux run

osx: kale.dylib
linux : kale.so
run: kale.bin

CC = gcc
OBJECTS = $(patsubst %.c,%.o,$(wildcard *.c))

$(OBJECTS): base64.h

kale.dylib: $(OBJECTS)
    $(CC) -dynamiclib -undefined suppress -flat_namespace -Wall $^ -o $@

kale.so: $(OBJECTS)
    $(CC) -shared -Wall $^ -o $@

kale: $(OBJECTS)
    $(CC) $^ -o $@

clean:
    rm -rf *.o
    rm -rf kale.dylib
    rm -rf kale.so
    rm -rf kale