[Bug 1888302] Re: byteswap-16.h file is missed in 20.04 LTS

[tomdean]

sudo apt-get --reinstall install libc6-dev
    sudo cp /mnt/usr/include/x86_64-linux-gnu/bits/byteswap-16.h /usr/include/x86_64-linux-gnu/bits/
    sudo cp /mnt/usr/include/x86_64-linux-gnu/bits/libio.h /usr/include/x86_64-linux-gnu/bits/
    sudo cp /mnt/usr/include/x86_64-linux-gnu/bits/_G_config.h /usr/include/x86_64-linux-gnu/bits/
    sudo cp /mnt/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed/limits.h /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed/
    sudo cp /mnt/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed/syslimits.h /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed/

fixed the problem

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https://bugs.launchpad.net/bugs/1888302

Title:
  byteswap-16.h file is missed in 20.04 LTS

Status in glibc package in Ubuntu:
  Invalid

Bug description:
  Steps to reproduce:
  1. Have Ubuntu 20.04 LTS installed
  2. Try to compile some application which uses byteswap-16.h (for example as described here - https://askubuntu.com/q/1260661)

  Expected results:
  * byteswap-16.h is found, compilation is successful

  Actual results:
  * byteswap-16.h is not found, compilation is not successful

  
  Note:
  the last Ubuntu version with this file was 18.04 LTS.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: libc6-dev 2.31-0ubuntu9
  ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
  Uname: Linux 5.4.0-40-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: MATE
  Date: Mon Jul 20 22:06:00 2020
  InstallationDate: Installed on 2020-04-23 (88 days ago)
  InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  SourcePackage: glibc
  UpgradeStatus: No upgrade log present (probably fresh install)

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