Re: [RFC] building postgres with meson

On Fri, Oct 15, 2021 at 11:00 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Peter E. did some hacking towards another solution awhile ago,
> but IIRC it involved changing the built binaries, and I think
> we concluded that the benefits didn't justify that.

Yeah, by now there are lots of useful blogs from various projects
figuring out that you can use the install_name_tool to adjust the
paths it uses to be absolute or relative to certain magic words, like
@executable_path/../lib/blah.dylib, which is tempting, but...
realistically, for serious hacking on a Mac, SIP is so annoying that
it isn't the only reason you'll want to turn it off: it stops
dtrace/dtruss/... from working, and somehow prevents debuggers from
working when you've ssh'd in from a remote machine with a proper
keyboard, and probably more things that I'm forgetting.

I wish I could find the Xnu source that shows exactly how and when the
environment is suppressed in this way to understand better, but it
doesn't jump out of Apple's github; maybe it's hiding in closed source
machinery...