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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/100057] There are no freestanding C++
Date: Tue, 13 Apr 2021 08:46:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100057

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build

--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
So first of all --disable-hosted-libstdcxx doesn't work up to its standard?=
=20
But maybe it's just specifics for x86_64-elf and other targets work fine he=
re.

Did you try forcing -ffreestanding for target library build with
CFLAGS_FOR_TARGET=3D"-g -O2 -ffreestanding" ../configure ....?

Because libstdc++ may not be the only target library with the stdint.h issu=
e.=