[PATCH:xset] Drop usleep fallbacks for ancient OS versions

[Alan Coopersmith]

Unix 98 requires usleep() so assume most supported non-Win32 platforms
have it and don't need old workarounds any more.

Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---
 configure.ac |    1 +
 xset.c       |   27 +++------------------------
 2 files changed, 4 insertions(+), 24 deletions(-)

diff --git a/configure.ac b/configure.ac
index 513b023..f7764bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,7 @@ AC_INIT([xset], [1.2.2],
         [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg], [xset])
 AC_CONFIG_SRCDIR([Makefile.am])
 AC_CONFIG_HEADERS([config.h])
+AC_USE_SYSTEM_EXTENSIONS
 
 # Initialize Automake
 AM_INIT_AUTOMAKE([foreign dist-bzip2])
diff --git a/xset.c b/xset.c
index 906fa95..7e27a09 100644
--- a/xset.c
+++ b/xset.c
@@ -549,35 +549,14 @@ main(int argc, char *argv[])
 		     * which case the Up transition may immediately
 		     * turn the display back on.
 		     *
-		     * On OS/2, use _sleep2()
 		     */
 
 #ifdef HAVE_USLEEP
 # define Usleep(us) usleep((us))
-#else
-#ifdef SVR4
-# ifdef sgi
-#  define Usleep(us) sginap((us) / 1000)
-# endif
-#endif
-#ifdef hpux
-# ifdef _XPG4_EXTENDED
-#  define Usleep(us) usleep((us))
-# endif
-#endif
-#ifdef __UNIXOS2__
-# define Usleep(us) _sleep2((us / 1000 > 0) ? us / 1000 : 1)
-#endif
-#ifdef WIN32
+#elif defined(WIN32)
 # define Usleep(us) Sleep(us)
-#endif
-#ifndef Usleep
-# if defined(SYSV) || defined(SVR4)
-#  define Usleep(us) sleep((us / 1000000 > 0) ? us / 1000000 : 1)
-# else
-#  define Usleep(us) usleep((us))
-# endif
-#endif
+#else
+# define Usleep(us) sleep((us / 1000000 > 0) ? us / 1000000 : 1)
 #endif /* HAVE_USLEEP */
 
 		    if (strcmp(arg, "on") == 0) {
-- 
1.7.9.2