Re: [RFC 0/6] A different approach to startup-with-shell on macOS

[Simon Marchi <simon dot marchi at polymtl dot ca>]

On 2018-09-29 14:43, Pedro Alves wrote:
> On 09/26/2018 12:11 PM, Tom Tromey wrote:
>
> > One question I have is whether it's possible to build gdb on an older
> > version of macOS and then run it on a newer version.  If this can be
> > done, then the #if-based approach taken in the final patch will not
> > work.
>
> I'd suspect so.  What, e.g., does Homebrew do?  Do they have packages
> built once for every Darwin version, or a single binary for several
> Darwin versions?  I'd think the latter, but I don't really know.
> And if indeed the latter, do they always build on the newest
> Darwin, or perhaps the oldest?

Here's the answer I got on the homebrew IRC channel:

> homebrew generally does this (but i think it's probably more 
> conservative than it needs to be)
> a bottle should never be deployed to an older macos version than it was 
> built on, anyway

"this" refers to whether the binaries always run on the same macos 
version as the one on which they have been built.

Simon