Test for localtime_r only after including the right MT enabling CFLAGS

1999-01-11  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: Test for localtime_r only after including the
	right MT enabling CFLAGS (i.e. -D_REENTRANT on most systems).

	* gdate.c (g_date_set_time): Emit warning, if no localtime_r
	function is available on thread enabled systems. Define ptm only,
	if really needed, and assert on it.

1 files changed, 11 insertions, 4 deletions

diff --git a/gdate.c b/gdate.c
index 04d0a9a8f..f44d70b73 100644
--- a/gdate.c
+++ b/gdate.c
@@ -790,15 +790,22 @@ g_date_set_time (GDate *d,
 		 GTime  time)
 {
   time_t t = time;
-  struct tm tm, *ptm;
+  struct tm tm;
   
   g_return_if_fail (d != NULL);
   
-#if HAVE_LOCALTIME_R
+#ifdef HAVE_LOCALTIME_R
   localtime_r (&t, &tm);
 #else
-  ptm = localtime (&t);
-  memcpy((void *) &tm, (void *) ptm, sizeof(struct tm));
+#  ifdef G_THREADS_ENABLED
+#  warning "the `g_date_set_time' function will not be MT-safe"
+#  warning "because there is no `localtime_r' on your system."
+#  endif
+  {
+    struct tm *ptm = localtime (&t);
+    g_assert (ptm);
+    memcpy ((void *) &tm, (void *) ptm, sizeof(struct tm));
+  }
 #endif
   
   d->julian = FALSE;