Created attachment 278045 [details, diff] Patch There is a typo (in_flags instead of in_cflags) in the eix-test-obsolete script which makes it always ignore the setting of REDUNDANT_IF_IN_CFLAGS.
Thanks. The patch is in current eix svn trunk (>=eix-0.22.9)
app-portage/eix-0.22.9 is in the tree