On Tue, Dec 19, 2006 at 09:08:23PM +0100, Paolo Bonzini wrote: > The Autoconf manual does not mention += among the source of > non-portabilities. I also checked BSD make and it has '+=' (search for > VAR_APPEND) since 1993 (revision 1.1): Oh. Well, thanks for educating me, in that case! -- Daniel Jacobowitz CodeSourcery