maint: update copyright

[gnulib.git] / m4 / dup3.m4

diff --git a/m4/dup3.m4 b/m4/dup3.m4
index b5fbaca..36a4441 100644 (file)
--- a/m4/dup3.m4
+++ b/m4/dup3.m4
@@ -1,5 +1,5 @@
-# dup3.m4 serial 2
-dnl Copyright (C) 2009-2010 Free Software Foundation, Inc.
+# dup3.m4 serial 5
+dnl Copyright (C) 2009-2014 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.
@@ -11,8 +11,20 @@ AC_DEFUN([gl_FUNC_DUP3],
   dnl Persuade glibc <unistd.h> to declare dup3().
   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-  AC_CHECK_FUNCS_ONCE([dup3])
+  AC_CHECK_FUNCS_ONCE([dup3 setdtablesize])
   if test $ac_cv_func_dup3 != yes; then
     HAVE_DUP3=0
   fi
+
+dnl Not needed yet, because dup3 is unconditionally replaced.
+dnl  dnl Replace dup3() for supporting the gnulib-defined fchdir() function,
+dnl  dnl to keep fchdir's bookkeeping up-to-date.
+dnl  m4_ifdef([gl_FUNC_FCHDIR], [
+dnl    gl_TEST_FCHDIR
+dnl    if test $HAVE_FCHDIR = 0; then
+dnl      if test $HAVE_DUP3 = 1; then
+dnl        REPLACE_DUP3=1
+dnl      fi
+dnl    fi
+dnl  ])
 ])