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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/100663] dietlibc build fail 'FP_NAN' was not declared
 in this scope
Date: Tue, 18 May 2021 22:29:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100663

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
           Severity|normal                      |enhancement

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think *-linux-dietlibc support has been ever upstreamed into GCC.
I am just seeing the support from config.{guess,sub} and libtool.  Nothing =
in
libgcc/config.host, gcc/config.gcc, or libstdc++/configure.host .

So you will need to add much more support than just libstdc++ here.


Since this was never supported, I am thinking about closing this as invalid=
 but
I will let someone else make that call.=