X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Futimens.m4;h=e90947fa879bcef2b53f76f452b31c3a843da5f9;hb=9f60473985e5f20c3efabadf2c1756b5ff560458;hp=10f682191a41d101017c5c53a185c4bd82d32e41;hpb=9a66010992ca6ea590f26fc89362b5b288e5ffbd;p=gnulib.git

diff --git a/m4/utimens.m4 b/m4/utimens.m4
index 10f682191..e90947fa8 100644
--- a/m4/utimens.m4
+++ b/m4/utimens.m4
@@ -1,17 +1,40 @@
-dnl Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+dnl Copyright (C) 2003-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
+dnl serial 6
+
 AC_DEFUN([gl_UTIMENS],
 [
-  AC_LIBSOURCES([utimens.c, utimens.h])
-  AC_LIBOBJ([utimens])
-
   dnl Prerequisites of lib/utimens.c.
-  AC_REQUIRE([gl_TIMESPEC])
   AC_REQUIRE([gl_FUNC_UTIMES])
   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_UTIMBUF])
-  AC_CHECK_FUNCS_ONCE([futimes futimesat])
+  AC_CHECK_FUNCS_ONCE([futimes futimesat futimens utimensat lutimes])
+
+  if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
+    dnl FreeBSD 8.0-rc2 mishandles futimesat(fd,NULL,time).  It is not
+    dnl standardized, but Solaris implemented it first and uses it as
+    dnl its only means to set fd time.
+    AC_CACHE_CHECK([whether futimesat handles NULL file],
+      [gl_cv_func_futimesat_works],
+      [touch conftest.file
+       AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <stddef.h>
+#include <sys/times.h>
+#include <fcntl.h>
+]], [[    int fd = open ("conftest.file", O_RDWR);
+          if (fd < 0) return 1;
+          if (futimesat (fd, NULL, NULL)) return 2;
+        ]])],
+        [gl_cv_func_futimesat_works=yes],
+        [gl_cv_func_futimesat_works=no],
+        [gl_cv_func_futimesat_works="guessing no"])
+      rm -f conftest.file])
+    if test "$gl_cv_func_futimesat_works" != yes; then
+      AC_DEFINE([FUTIMESAT_NULL_BUG], [1],
+        [Define to 1 if futimesat mishandles a NULL file name.])
+    fi
+  fi
 ])