+ build-aux/compile
+ build-aux/config.guess
+ build-aux/config.sub
+ build-aux/depcomp
+ build-aux/missing
+ build-aux/move-if-change
+ build-aux/snippet/_Noreturn.h
+ build-aux/snippet/arg-nonnull.h
+ build-aux/snippet/c++defs.h
+ build-aux/snippet/warn-on-use.h