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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: Sat, 17 Sep 2022 19:37:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103626

--- Comment #2 from Arsen Arsenovi=C4=87 <arsen at aarsen dot me> ---
I started work on marking headers, and I already marked 162 headers (all of
include/{std,bits,backward}, where appropriate) as part of my work on P1642.

This set also lines up with the set of all installed installed headers for
P1642. I already have a list of remaining headers that need to be marked, I=
'll
be handling these, and maybe reverting the change on <expected> (to make it
freestanding).

The progress can be tracked here: https://github.com/ArsenArsen/gcc/tree/p1=
6412
This branch includes the titular changes, in order to support switching bet=
ween
freestanding and hosted, a rework of how freestanding headers are handled a=
nd
installed (though, I would like to exclude even more targets and files, so =
that
stuff doesn't get stamped needlessly, probably by constraining allstamped,
unsure so far), <bits/requires_hosted.h>, and the aforementioned marking.

Next on my agenda is checking whether this version still produces equivalent
results in hosting to the unpatched version of GCC, and updating the testsu=
ite
after that, then I can resume marking headers if this approach is deemed
acceptable (which I'd like to get a greenlight on before editing 400-some
headers by hand)=