Import upstream version 1.27

[debian/tar] / m4 / rmdir.m4

diff --git a/m4/rmdir.m4 b/m4/rmdir.m4
index 41705a1ee442b7ae8bdfac2d993ab702d609176f..f6a02dd24a86aca5e6a7d13983ad44709b581c7f 100644 (file)
--- a/m4/rmdir.m4
+++ b/m4/rmdir.m4
@@ -1,5 +1,5 @@
-# rmdir.m4 serial 10
-dnl Copyright (C) 2002, 2005, 2009-2011 Free Software Foundation, Inc.
+# rmdir.m4 serial 13
+dnl Copyright (C) 2002, 2005, 2009-2013 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.
@@ -7,7 +7,9 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_RMDIR],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   dnl Detect cygwin 1.5.x bug.
+  AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CACHE_CHECK([whether rmdir works], [gl_cv_func_rmdir_works],
     [mkdir conftest.dir
      touch conftest.file
@@ -15,7 +17,11 @@ AC_DEFUN([gl_FUNC_RMDIR],
        [AC_LANG_PROGRAM(
          [[#include <stdio.h>
            #include <errno.h>
-           #include <unistd.h>
+           #if HAVE_UNISTD_H
+           # include <unistd.h>
+           #else /* on Windows with MSVC */
+           # include <direct.h>
+           #endif
 ]], [[int result = 0;
       if (!rmdir ("conftest.file/"))
         result |= 1;
@@ -26,10 +32,18 @@ AC_DEFUN([gl_FUNC_RMDIR],
       return result;
     ]])],
        [gl_cv_func_rmdir_works=yes], [gl_cv_func_rmdir_works=no],
-       [gl_cv_func_rmdir_works="guessing no"])
+       [case "$host_os" in
+                  # Guess yes on glibc systems.
+          *-gnu*) gl_cv_func_rmdir_works="guessing yes" ;;
+                  # If we don't know, assume the worst.
+          *)      gl_cv_func_rmdir_works="guessing no" ;;
+        esac
+       ])
      rm -rf conftest.dir conftest.file])
-  if test x"$gl_cv_func_rmdir_works" != xyes; then
-    REPLACE_RMDIR=1
-    AC_LIBOBJ([rmdir])
-  fi
+  case "$gl_cv_func_rmdir_works" in
+    *yes) ;;
+    *)
+      REPLACE_RMDIR=1
+      ;;
+  esac
 ])