Re: PostgreSQL does not compile on macOS SDK 15.0

On Mon, Jul 1, 2024 at 2:06 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Thomas Munro <thomas.munro@gmail.com> writes:
> > I don't have any great ideas about what to do about this.
> > Cybersquatting system facilities is a messy business, so maybe the
> > proposed grotty solution is actually appropriate!  We did bring this
> > duelling Henry Spencers problem upon ourselves.  Longer term,
> > pg_regex_t seems to make a lot of sense, except IIUC we want to keep
> > this code in sync with TCL so perhaps a configurable prefix could be
> > done with macrology?
>
> Yeah.  I'd do pg_regex_t in a minute except that it'd break existing
> extensions using our facilities.  However, your mention of macrology
> stirred an idea: could we have our regex/regex.h intentionally
> #include the system regex.h and then do
>         #define regex_t pg_regex_t
> ?  If that works, our struct is really pg_regex_t, but we don't have
> to change any existing calling code.  It might get a bit messy
> undef'ing and redef'ing all the other macros in regex/regex.h, but
> I think we could make it fly without any changes in other files.

Good idea.  Here's an attempt at that.

I don't have a Mac with beta SDK 15 yet, but I think this should work?