nanosleep: Work around bug on newer 32-bit mingw.

* m4/nanosleep.m4 (gl_FUNC_NANOSLEEP): Test for 32-bit mingw bug.
* tests/test-nanosleep.c (main): Add another test.
* doc/posix-functions/nanosleep.texi: Mention the mingw bug.

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/test-nanosleep.c b/tests/test-nanosleep.c
index e7edeffc0e..c208161559 100644
--- a/tests/test-nanosleep.c
+++ b/tests/test-nanosleep.c
@@ -43,16 +43,27 @@ main (void)
 {
   struct timespec ts;
 
+  /* Check that negative nanosecond values cause failure.  */
+  ts.tv_sec = 1;
+  ts.tv_nsec = -1;
+  errno = 0;
+  ASSERT (nanosleep (&ts, NULL) == -1);
+  ASSERT (errno == EINVAL);
+
   ts.tv_sec = 1000;
   ts.tv_nsec = -1;
   errno = 0;
   ASSERT (nanosleep (&ts, NULL) == -1);
   ASSERT (errno == EINVAL);
+
+  /* Check that too large nanosecond values cause failure.  */
+  ts.tv_sec = 1000;
   ts.tv_nsec = 1000000000;
   errno = 0;
   ASSERT (nanosleep (&ts, NULL) == -1);
   ASSERT (errno == EINVAL);
 
+  /* Check successful call.  */
   ts.tv_sec = 0;
   ts.tv_nsec = 1;
   ASSERT (nanosleep (&ts, &ts) == 0);