From 9299ad8c3ffdd8c3b78d33346cac355ee98462b9 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Thu, 19 Aug 2010 03:47:50 +0000
Subject: [PATCH] support even older versions of mingw (as found on some Debian
 distros) that lack usleep/nanosleep, but have _sleep

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1828 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
---
 urjtag/ChangeLog        |  6 ++++++
 urjtag/configure.ac     |  1 +
 urjtag/src/lib/usleep.c | 17 ++++++++++++++---
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/urjtag/ChangeLog b/urjtag/ChangeLog
index 3421db85..05774c50 100644
--- a/urjtag/ChangeLog
+++ b/urjtag/ChangeLog
@@ -1,3 +1,9 @@
+2010-08-18  Mike Frysinger  <vapier@gentoo.org>
+
+  * configure.ac (AC_CHECK_FUNCS): Check for _sleep.
+  * src/lib/usleep.c: Support a fuzzy version of usleep based on old mingw
+    _sleep functions.
+
 2010-08-16  Mike Frysinger  <vapier@gentoo.org>
 
   * src/tap/detect.c (urj_tap_detect_parts): Include paths to data files when
diff --git a/urjtag/configure.ac b/urjtag/configure.ac
index 8ed64cc4..4db4a98f 100644
--- a/urjtag/configure.ac
+++ b/urjtag/configure.ac
@@ -116,6 +116,7 @@ else
 fi
 
 AC_CHECK_FUNCS(m4_flatten([
+	_sleep
 	geteuid
 	getuid
 	nanosleep
diff --git a/urjtag/src/lib/usleep.c b/urjtag/src/lib/usleep.c
index 05a2c567..6b4d4d50 100644
--- a/urjtag/src/lib/usleep.c
+++ b/urjtag/src/lib/usleep.c
@@ -23,9 +23,7 @@
 
 #ifndef HAVE_USLEEP
 
-#ifndef HAVE_NANOSLEEP
-#  error Need usleep or nanosleep
-#endif
+#ifdef HAVE_NANOSLEEP
 
 #include <time.h>
 
@@ -42,4 +40,17 @@ int usleep (long unsigned usec)
     return nanosleep (&req, NULL);
 }
 
+#elif defined(HAVE__SLEEP)
+
+/* Not exact, but close enough */
+int usleep (long unsigned usec)
+{
+    _sleep (usec / 1000);
+    return 0;
+}
+
+#else
+# error "Need sleep, usleep, or nanosleep"
+#endif
+
 #endif