C_SOURCES := main.c a.c b.c c.c
EXE := # Define a.out explicitly
MAKE_DSYM := NO
all: a.out
a.out: main.o libfoo.a
$(LD) $(LDFLAGS) $^ -o $@
lib_ab.a: a.o b.o
$(AR) $(ARFLAGS) $@ $^
$(RM) $^
# Here we make a .a file that has two a.o files with different modification
# times and different content by first creating libfoo.a with only a.o and b.o,
# then we sleep for 2 seconds, touch c.o to ensure it has a different
# modification time, and then rename c.o to a.o and then add it to the .a file
# again. This is to help test that the module cache will create different
# directories for the two different a.o files.
libfoo.a: lib_ab.a c.o
sleep 2
touch c.o
mv c.o a.o
$(AR) $(ARFLAGS) $@ lib_ab.a a.o
$(RM) a.o
include Makefile.rules