Question on make

[Bill Chimiak]

When composing a makefile, if I wish to
have a program, pgm, be dependent on an archive rather
than use the .o files in a macro statement, 
how is this done?  Let's say the makefile initially
reads:

OBJECTS = x.o y.o z.o
pgm: $(OBJECTS)
	cc $(OBJECTS) -o pgm
x.o : defsx.h
y.o : defsy.h

but I want it to read instead something like:

pgm: file.a
	cc file.a -o pgm
where x.o, y.o and z.o are in the archive file.a .