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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Sun, 7 Jun 2020 22:56:21 +0100
Message-ID: <CAH6eHdStSjWOVT7whkTH7Uw4URj+kwgRPvg0Q800C6nW8Gk0AQ@mail.gmail.com>
Subject: Re: g++ version 7.5.0 and library <memory_resource>
To: hbusch@bnv-bamberg.de
Cc: gcc-help <gcc-help@gcc.gnu.org>
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On Sun, 7 Jun 2020 at 20:12, <hbusch@bnv-bamberg.de> wrote:
>
> Hi,
> I am using g++ version 7.5.0 on Linux Mint 19 Tara:
>
> g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
>
> When I try to compile a source file which uses the Standard library
> header <memory_resource> I get the following error:
>
> main.cpp:7:10: fatal error: memory_resource: No such file or directory
>
> As to my knowledge g++ version 7.5.0 supports C++17 and library
> <memory_resource> is included since C++17. At least, this page tells
> me that it has to be there:
>
> https://gcc.gnu.org/onlinedocs/gcc-7.5.0/libstdc++/api/a01004_source.html

No it doesn't, it tells you a different header is part of libstdc++ in
the 7.5.0 release.

As https://gcc.gnu.org/onlinedocs/gcc-7.5.0/libstdc++/manual/manual/status.html#status.iso.2017
says, the <memory_resource> header is not supported in 7.5.0.