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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Mon, 21 Mar 2022 10:19:35 +0000
Message-ID: <CAH6eHdTNpuTzAgFxGH=EtV3yjMF-J6xraPb95PFTxthDjvMELg@mail.gmail.com>
Subject: Re: passing command-line arguments, still
To: David Edelsohn <dje.gcc@gmail.com>
Cc: GCC Development <gcc@gcc.gnu.org>
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On Sat, 19 Mar 2022 at 17:53, David Edelsohn wrote:
> The %{} syntax is the "Specs language" used for options processing by
> GCC.  It is not related to autoconf.  The options processing is
> handled in gcc.c.  Please see the comment in gcc/gcc.cc beginning with
> "The Specs Language".

And https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html