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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/103305] [12 Regression] Cannot build C++ with newlib
 on aarch64-none-elf or bfin-elf
Date: Wed, 17 Nov 2021 18:31:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103305

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
>      static const mask blank    =3D space;

We might want to use blank =3D _ISspace | _ISblank for this last one, but I=
 don't
really understand what newlib defines those categories as:


#define isblank(__c) \
  __extension__ ({ __typeof__ (__c) __x =3D (__c);                \
        (__ctype_lookup(__x)&_B) || (int) (__x) =3D=3D '\t';})
        (__ctype_lookup(__x)&_ISblank) || (int) (__x) =3D=3D '\t';})

This definition is weird ... why is '\t' not already handled by _ISblank?=