.la files from outside the current project

[Robert Collins]

When I put the following:

bin_PROGRAMS = foo

foo_SOURCES = src/foo.cc
foo_LDADD = libbar.la

into a Makefile.am, the foo_DEPENDENCIES target gets libbar.la added -
even though it's not included in the source. libbar.la is present in
/usr/lib or /usr/local/lib. How can I avoid the auto-setting of
foo_DEPENDENCIES ?

Rob