log2f-ieee: Work around test failure on NetBSD 5.1 and Solaris 10.

[gnulib.git] / m4 / dup2.m4

diff --git a/m4/dup2.m4 b/m4/dup2.m4
index b4a2219..dec27fa 100644 (file)
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,5 +1,5 @@
-#serial 14
-dnl Copyright (C) 2002, 2005, 2007, 2009-2011 Free Software Foundation, Inc.
+#serial 17
+dnl Copyright (C) 2002, 2005, 2007, 2009-2012 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.
@@ -12,7 +12,6 @@ AC_DEFUN([gl_FUNC_DUP2],
     AC_CHECK_FUNCS_ONCE([dup2])
     if test $ac_cv_func_dup2 = no; then
       HAVE_DUP2=0
-      AC_LIBOBJ([dup2])
     fi
   ], [
     AC_DEFINE([HAVE_DUP2], [1], [Define to 1 if you have the 'dup2' function.])
@@ -60,7 +59,7 @@ AC_DEFUN([gl_FUNC_DUP2],
          esac])
       ])
     if test "$gl_cv_func_dup2_works" = no; then
-      gl_REPLACE_DUP2
+      REPLACE_DUP2=1
     fi
   fi
   dnl Replace dup2() for supporting the gnulib-defined fchdir() function,
@@ -68,17 +67,12 @@ AC_DEFUN([gl_FUNC_DUP2],
   m4_ifdef([gl_FUNC_FCHDIR], [
     gl_TEST_FCHDIR
     if test $HAVE_FCHDIR = 0; then
-      gl_REPLACE_DUP2
+      if test $HAVE_DUP2 = 1; then
+        REPLACE_DUP2=1
+      fi
     fi
   ])
 ])
 
-AC_DEFUN([gl_REPLACE_DUP2],
-[
-  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-  AC_CHECK_FUNCS_ONCE([dup2])
-  if test $ac_cv_func_dup2 = yes; then
-    REPLACE_DUP2=1
-  fi
-  AC_LIBOBJ([dup2])
-])
+# Prerequisites of lib/dup2.c.
+AC_DEFUN([gl_PREREQ_DUP2], [])