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From: "jscott at posteo dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/29375] New: don't hide MAP_ANONYMOUS behind _GNU_SOURCE
Date: Mon, 18 Jul 2022 11:51:46 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29375

            Bug ID: 29375
           Summary: don't hide MAP_ANONYMOUS behind _GNU_SOURCE
           Product: glibc
           Version: 2.36
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: jscott at posteo dot net
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Hi,

POSIX is going to standardize MAP_ANONYMOUS in Issue 8. However, there's no
reason why we can't expose it to POSIX-conforming applications right now. M=
AP_
constants are in the implementation-reserved namespace according to the
standard, and musl libc already exposes MAP_ANON(YMOUS) when only
_POSIX_C_SOURCE is set. glibc should adopt this same behavior so it's easier
for application writers to use this lovely functionality.

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