From 912da04e8be8f7b78ea66c0fba08b2ceb292b8b0 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sun, 11 Sep 2011 21:44:32 +0200
Subject: unistd et al.: Don't assume <unistd.h> exists.

* m4/chdir-long.m4 (gl_FUNC_CHDIR_LONG): Don't include <unistd.h> if it
does not exist.
* m4/environ.m4 (gl_ENVIRON): Don't include <unistd.h> if it does not
exist. But include <stdlib.h>.
* m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): If <unistd.h> does not exist,
include <io.h> and <stdlib.h> instead. Don't test symbolink links if
symlink() does not exist.
* m4/fflush.m4 (gl_FUNC_FFLUSH_STDIN): If <unistd.h> does not exist,
include <io.h> instead.
* m4/free.m4 (gl_FUNC_FREE): Assume free(NULL) works on native Windows.
* m4/getcwd.m4 (gl_FUNC_GETCWD_NULL): If <unistd.h> does not exist,
include <direct.h> instead.
* m4/getcwd-abort-bug.m4 (gl_FUNC_GETCWD_ABORT_BUG): Likewise.
* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Likewise.
* m4/lseek.m4 (gl_FUNC_LSEEK): If <unistd.h> does not exist, include
<io.h> instead.
* m4/rename.m4 (gl_FUNC_RENAME): Assume rename() manages hard links
correctly if the system does not have hard links.
* m4/rmdir.m4 (gl_FUNC_RMDIR): If <unistd.h> does not exist, include
<direct.h> instead.
* m4/unistd_h.m4 (gl_UNISTD_H): If <unistd.h> does not exist, bypass
it when looking for function declarations.
* m4/unlink.m4 (gl_FUNC_UNLINK): If <unistd.h> does not exist, include
<direct.h> and <io.h> instead.
* doc/posix-headers/unistd.texi: More details about MSVC problem.
---
 m4/getcwd-path-max.m4 | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'm4/getcwd-path-max.m4')

diff --git a/m4/getcwd-path-max.m4 b/m4/getcwd-path-max.m4
index 475ae96d16..65ee491037 100644
--- a/m4/getcwd-path-max.m4
+++ b/m4/getcwd-path-max.m4
@@ -1,4 +1,4 @@
-# serial 16
+# serial 17
 # Check for several getcwd bugs with long file names.
 # If so, arrange to compile the wrapper function.
 
@@ -17,6 +17,7 @@ AC_DEFUN([gl_FUNC_GETCWD_PATH_MAX],
 [
   AC_CHECK_DECLS_ONCE([getcwd])
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CACHE_CHECK([whether getcwd handles long file names properly],
     gl_cv_func_getcwd_path_max,
     [# Arrange for deletion of the temporary directory this test creates.
@@ -27,7 +28,11 @@ AC_DEFUN([gl_FUNC_GETCWD_PATH_MAX],
           [[
 #include <errno.h>
 #include <stdlib.h>
-#include <unistd.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# include <direct.h>
+#endif
 #include <string.h>
 #include <limits.h>
 #include <sys/stat.h>
-- 
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