[Bug 1992720] [NEW] glibc_2.31-0ubuntu9.9.debian.tar.xz build error

[cauc.peter]

Public bug reported:

Description:    Ubuntu 20.04.4 LTS
Release:        20.04

1. download glibc by： apt-get source glibc (2.31-0ubuntu9.9)
2. cd glibc-2.31 && DEB_BUILD_OPTIONS="parallel=8" ./debian/rules build 


error message:
.....
=== time.h ===
*  invalid macro `TIME_UTC'
** macro `CLOCK_REALTIME' not defined
** macro `TIMER_ABSTIME' not defined
=== unistd.h ===
=== utime.h ===
----------
----------
XFAIL: stdlib/tst-system
original exit status 1
error: test-container.c:1096: Unable to exec /tmp/p/glibc-2.31/build-tree/amd64-libc/stdlib/tst-system

** Affects: glibc (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1992720

Title:
  glibc_2.31-0ubuntu9.9.debian.tar.xz build error

Status in glibc package in Ubuntu:
  New

Bug description:
  Description:    Ubuntu 20.04.4 LTS
  Release:        20.04

  1. download glibc by： apt-get source glibc (2.31-0ubuntu9.9)
  2. cd glibc-2.31 && DEB_BUILD_OPTIONS="parallel=8" ./debian/rules build 

  
  error message:
  .....
  === time.h ===
  *  invalid macro `TIME_UTC'
  ** macro `CLOCK_REALTIME' not defined
  ** macro `TIMER_ABSTIME' not defined
  === unistd.h ===
  === utime.h ===
  ----------
  ----------
  XFAIL: stdlib/tst-system
  original exit status 1
  error: test-container.c:1096: Unable to exec /tmp/p/glibc-2.31/build-tree/amd64-libc/stdlib/tst-system

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