Tell Emacs to behave.

.dir-locals.el

@@ -0,0 +1,4 @@
+;; Hey Emacs, use the ugly style!
+
+((c-mode . ((c-file-style . "linux")
+	    (indent-tabs-mode . t))))

gcc-plugin/.dir-locals.el

@@ -0,0 +1,3 @@
+;; Hey Emacs, this is much nicer down here.
+
+((c-mode . ((c-file-style . "gnu"))))