On 12/02/2010 12:10 PM, Ralf Wildenhues wrote: > I'm not sure if it was mentioned before in the discussion, but > portability-wise, there is a difference between one level of recursion > and arbitrary many. IIRC then IRIX make only supported one level, i.e., > $(var1$(var2$(var3))) > > was erroneous, but > $(var1$(var2)) > > was not. Also, with a one-character variable X > $(var$X) > > was erroneous with at least one legacy make implementation (but I think > it was more than one); but > $(var$(X)) > > worked. > > If you like, I can go back and verify the details.
Yes please, and I will feed that information back to the Austin Group. It may result in a wording modification and a restart of the 30-day review window (changing the wording proposal to explicitly leave the problematic corner cases unspecified) so that the goal of including the change as part of the technical corrigendum 1 of POSIX 2008 (probably coming by late 2011) will not invalidate existing implementations; or it may result in the Austin Group deferring the change to the next full revision of the standard (several years out) to give those implementations time to comply with a tighter standard. -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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