http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54453
--- Comment #2 from Steven Bosscher <steven at gcc dot gnu.org> 2012-09-01 17:36:30 UTC --- Created attachment 28117 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28117 Revert a few Makefile.am regexps This patch fixes things for me. Note the subtle change from ["tab"] in r190783 back to ["space+tab"]. I don't know if this was an intentional change or not.