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From: "weidmann at acm dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/114866] New: <memory> & out_ptr in freestanding
Date: Fri, 26 Apr 2024 18:05:05 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 14.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: weidmann at acm dot org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114866

            Bug ID: 114866
           Summary: <memory> & out_ptr in freestanding
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: weidmann at acm dot org
  Target Milestone: ---

With gcc version 14.0.1 20240411 (Red Hat 14.0.1-0) (GCC) on x86_64 GNU/Lin=
ux.

Using the following command options:

g++ -std=3Dc++23 -fno-rtti -fno-exceptions -fno-non-call-exceptions
-fno-unwind-tables -fno-use-cxa-atexit -fno-enforce-eh-specs -faligned-new
-fsized-deallocation -fpermissive   -m32 -ffreestanding -fomit-frame-pointer
-Os -fno-asynchronous-unwind-tables -fno-builtin -Wall -fanalyzer

I get the following error:

In file included from /usr/include/c++/14/memory:95,
...
/usr/include/c++/14/bits/out_ptr.h:57:22: error: =E2=80=98__is_shared_ptr=
=E2=80=99 was not
declared in this scope
   57 |       static_assert(!__is_shared_ptr<_Smart> || sizeof...(_Args) !=
=3D 0,

Is #if _GLIBCXX_HOSTED missing around=20

#if __cplusplus > 202002L
#  include <bits/out_ptr.h>
#endif

> As a quick workaround for building my project, I define #define _GLIBCXX_=
OUT_PTR_H before including <memory>=