add xz-utils back to the Suggests list

[tar] / m4 / rmdir.m4

diff --git a/m4/rmdir.m4 b/m4/rmdir.m4
index 7235203f2e6ea526b163e0b594f52710ae5ea7ef..8d6bee8bb5a5d4c5fc340ccaecea9be13120356c 100644 (file)
--- a/m4/rmdir.m4
+++ b/m4/rmdir.m4
@@ -1,10 +1,44 @@
-# rmdir.m4 serial 3
-dnl Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+# rmdir.m4 serial 7
+dnl Copyright (C) 2002, 2005, 2009-2010 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.
 
 AC_DEFUN([gl_FUNC_RMDIR],
 [
-  AC_REPLACE_FUNCS(rmdir)
+  AC_REQUIRE([gl_AC_DOS])
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  dnl FIXME: simplify this module in 2010 if no one reports a missing rmdir
+  AC_REPLACE_FUNCS([rmdir])
+  if test $ac_cv_func_rmdir = no; then
+    REPLACE_RMDIR=1
+    # If someone lacks rmdir, make configure fail, and request
+    # a bug report to inform us about it.
+    if test x"$SKIP_RMDIR_CHECK" != xyes; then
+      AC_MSG_FAILURE([Your system lacks the rmdir function.
+              Please report this, along with the output of "uname -a", to the
+              bug-coreutils@gnu.org mailing list.  To continue past this point,
+              rerun configure with SKIP_RMDIR_CHECK=yes.
+              E.g., ./configure SKIP_RMDIR_CHECK=yes])
+    fi
+  else
+    dnl Detect cygwin 1.5.x bug.
+    AC_CACHE_CHECK([whether rmdir works], [gl_cv_func_rmdir_works],
+      [mkdir conftest.dir
+       touch conftest.file
+       AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+           [[#include <stdio.h>
+             #include <errno.h>
+             #include <unistd.h>
+]], [[return !rmdir ("conftest.file/") || errno != ENOTDIR
+       || !rmdir ("conftest.dir/./");]])],
+         [gl_cv_func_rmdir_works=yes], [gl_cv_func_rmdir_works=no],
+         [gl_cv_func_rmdir_works="guessing no"])
+       rm -rf conftest.dir conftest.file])
+    if test x"$gl_cv_func_rmdir_works" != xyes; then
+      REPLACE_RMDIR=1
+      AC_LIBOBJ([rmdir])
+    fi
+  fi
 ])