From 76f22e4c2cda8bcb2e11c6153c4091eaa577fc1a Mon Sep 17 00:00:00 2001
From: "VMware, Inc" <>
Date: Wed, 24 Feb 2010 13:03:30 -0800
Subject: [PATCH] OVT: have configure check for presence of linux/unistd.h

Not everyone installs kernel-headers/linux-userspace-headers package
and without it compilation fails with a puzzling error. We better
check that the required header is present upfront.

Signed-off-by: Marcelo Vanzin <mvanzin@vmware.com>
---
 open-vm-tools/configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/open-vm-tools/configure.ac b/open-vm-tools/configure.ac
index 71c4bf928..7be4fc5fb 100644
--- a/open-vm-tools/configure.ac
+++ b/open-vm-tools/configure.ac
@@ -812,6 +812,14 @@ AC_CHECK_HEADER(
    [HAVE_WCHAR_H="yes"],
    [HAVE_WCHAR_H="no"])
 
+if test "$os" = "linux"; then
+   # Make sure kernel-headers package is installed.
+   AC_CHECK_HEADER(
+      [linux/unistd.h],
+      [],
+      [AC_MSG_ERROR(linux/unistd.h is not found. Please install kernel-headers/linux-userspace-headers/linux-libc-dev package.)])
+fi
+
 if test "$enable_multimon" != "no"; then
    AC_CHECK_HEADER(
       [X11/extensions/panoramiXproto.h],
-- 
2.47.3