time_r: fix typo that always overrode localtime_r decl

* m4/time_r.m4 (gl_TIME_R): Use AC_CHECK_DECLS, not
AC_CHECK_DECLS_ONCE, since localtime_r is declared in <time.h>,
not in a standard include.

diff --git a/ChangeLog b/ChangeLog
index a12bccf..74354d5 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-06-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+       time_r: fix typo that always overrode localtime_r decl
+       * m4/time_r.m4 (gl_TIME_R): Use AC_CHECK_DECLS, not
+       AC_CHECK_DECLS_ONCE, since localtime_r is declared in <time.h>,
+       not in a standard include.
+
 2012-06-22  Bruno Haible  <bruno@clisp.org>
 
        Write "Mac OS X" instead of "MacOS X".

diff --git a/m4/time_r.m4 b/m4/time_r.m4
index c3579fb..9ddbd01 100644 (file)
--- a/m4/time_r.m4
+++ b/m4/time_r.m4
@@ -17,7 +17,7 @@ AC_DEFUN([gl_TIME_R],
 
   dnl Some systems don't declare localtime_r() and gmtime_r() if _REENTRANT is
   dnl not defined.
-  AC_CHECK_DECLS_ONCE([localtime_r])
+  AC_CHECK_DECLS([localtime_r], [], [], [[#include <time.h>]])
   if test $ac_cv_have_decl_localtime_r = no; then
     HAVE_DECL_LOCALTIME_R=0
   fi