Conditionals in Makefiles

[Ralph Finch]

A while ago I had a very elementary question about makefiles, which a
number of people were kind enough to respond to.  A big thanks to you,
and now another makefile question.

I want to conditionally use 1 of 2 different libraries, depending upon
a macro set in the command line:

make type=x

	-or-

make type=y

How can the makefile conditionally use a different library, depending
upon what the macro 'type' equals?  If x or y were targets, it would
be so:

x := LIBRARY = lib1
y := LIBRARY = lib2

but I am using targets for something else.

Thanks,
-- 
Ralph Finch
...ucbvax!ucdavis!caldwr!rfinch