Re: Large C files

Peter Geoghegan wrote:
> On 7 September 2011 00:13, Peter Geoghegan <peter(at)2ndquadrant(dot)com> wrote:
> > * Within TUs, we unshadow a previously shadowed variable, so we link
> > to a global variable rather than one local to the original/other new
> > file. Unlikely to be a problem. Here's what I get when I compile
> > xlog.c in the usual way with the addition of the -Wshadow flag:
>
> I hit send too soon. Of course, this isn't going to matter in the case
> I described because an extern declaration of int foo cannot appear in
> the same TU as a static declaration of int foo - it won't compile. I
> hastily gave that as an example of a general phenomenon that can occur
> when performing this splitting process. An actually valid example of
> same would be if someone refactored functions a bit as part of this
> process to make things more modular, and now referenced a global
> variable rather than a local one as part of that process. This is
> quite possible, because namespace pollution is a big problem with
> heavyweight C files - Just look at how much output that -Wshadow flag
> gives when used on xlog.c.

I am confused how moving a function from one C file to another could
cause breakage?

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