How do I make the GWT Compiler see other modules in Eclipse?

I'm using GWT 2.7 with Eclipse.  I have one Eclipse project, let's call it "foo" that has a bunch of server side code compiled into a GWT module.  I have another Eclipse project, let's call it "bar" that has a bunch of web app code compiled into a GWT module.  I need to reference the foo code in the bar code.

I added an "inherits" tag to the bar's gwt.xml module definition file.

I added the Eclipde project foo to the classpath of bar.

I added a project reference from bar to foo.

I've basically tried everything I can think off, but when I compile bar, I get errors like this:

Line 22: No source code is available for type com.xxx.yyy.Zzz; did you forget to inherit a required module?

I've also searched the web and this group.  I see some answers from 2009 that involve Maven (which I'm not using) and older versions of the GWT compiler, but nothing has solved my problem.

What am I missing?

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