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From: "unlvsur at live dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/100057] There are no freestanding C++
Date: Wed, 29 Dec 2021 23:57:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100057

--- Comment #35 from cqwrteur <unlvsur at live dot com> ---
(In reply to Nicolas Noble from comment #34)
> After some digging, I found out this in the acinclude.m4 file of the
> libstdc++-v3 folder:
>=20
> AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
>   AC_ARG_ENABLE([hosted-libstdcxx],
>     AC_HELP_STRING([--disable-hosted-libstdcxx],
>                    [only build freestanding C++ runtime support]),,
>     [case "$host" in
>         arm*-*-symbianelf*)
>             enable_hosted_libstdcxx=3Dno
>             ;;
>         *)
>             enable_hosted_libstdcxx=3Dyes
>             ;;
>      esac])
>=20
>=20
> Basically, it looks like the "disable hosted libstdc++" flag is only hono=
red
> when building on a host triple that's arm + symbian. The documentation +
> reporting for this is extremely misguiding. The documentation should at
> least specify this only works in a very narrow context, and the configure
> script should probably error out if the user asks for a feature it can't
> actually provide.

wg21 just did a crappy job on this shit and GCC does not give a shit on
freestanding either.

You do not have std::addressof, std::move, std::array but the fucking ISO
forces you to use EH and RTTI.

C++ considered harmful for embedded and kernel.=