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From: "arsen at aarsen dot me" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/103626] _GLIBCXX_HOSTED should respect -ffreestanding
Date: Sun, 18 Sep 2022 01:40:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103626

--- Comment #4 from Arsen Arsenovi=C4=87 <arsen at aarsen dot me> ---
(In reply to Jonathan Wakely from comment #3)
> I don't think we need to add the #error to every header. For a start, use=
rs
> never include the bits/* headers directly, and if they do, it's their
> problem. So we only need to mark the standard headers as hosted-only. And=
 if
> we add it to <iosfwd>, that already covers a large number of them, because
> they include that.

My thinking behind doing that was that it'd make includes transitively carr=
y a
requirement on hosted, so that if some header is meant to be freestanding, =
but
depends on a hosted header, that could be detected (and that could probably=
 be
a testcase).=