b55e8e6e0d
issue. lib/atf isn't a prereq_lib, since it isn't required for other libraries to build. Remove it. The old kludge of always building it had effectively been retired. Since we don't want to build the libraries with the tests when we're bootstrapping, invent MK_TESTS_SUPPORT which normally defaults to the current MK_TESTS value, except when explicitly defined. Make lib/atf depend on it being yes. When building the libraries set MK_TESTS to no, and MK_TESTS_SUPPORT to the current value of MK_TESTS so that later stages of the build work correctly. This should fix (and does for me) people's issues with parallel builds racing between lib/atf and libexec/atf. Since lib/atf is built during the libraries phase, the race disappears.
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