[glibc/azanella/y2038] time: Add basic timespec_get tests

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9bf8d81540ff170161d549226ffee52ff65d6085

commit 9bf8d81540ff170161d549226ffee52ff65d6085
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Mar 1 13:14:03 2021 -0300

    time: Add basic timespec_get tests
    
    Checkec on x86_64-linux-gnu and i686-linux-gnu.

Diff:
---
 time/Makefile           |  2 +-
 time/tst-timespec_get.c | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/time/Makefile b/time/Makefile
index 5d865a4054..29208f35c0 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -49,7 +49,7 @@ tests	:= test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
 	   tst-tzname tst-y2039 bug-mktime4 tst-strftime2 tst-strftime3 \
 	   tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1 \
 	   tst-adjtime tst-ctime tst-difftime tst-mktime4 tst-clock_settime \
-	   tst-itimer tst-gmtime tst-timegm
+	   tst-itimer tst-gmtime tst-timegm tst-timespec_get
 
 include ../Rules
 
diff --git a/time/tst-timespec_get.c b/time/tst-timespec_get.c
new file mode 100644
index 0000000000..7389927db4
--- /dev/null
+++ b/time/tst-timespec_get.c
@@ -0,0 +1,40 @@
+/* Basic tests for timespec_get.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <time.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  {
+    struct timespec ts;
+    TEST_COMPARE (timespec_get (&ts, 0), 0);
+  }
+
+  {
+    struct timespec ts;
+    TEST_COMPARE (timespec_get (&ts, TIME_UTC), TIME_UTC);
+    TEST_VERIFY (ts.tv_nsec >= 0);
+    TEST_VERIFY (ts.tv_nsec < 1000000000);
+  }
+
+  return 0;
+}
+
+#include <support/test-driver.c>