1 files changed, 6 insertions, 0 deletions
diff --git a/cfg.mk b/cfg.mk
index babd99b3c..c57c0d3e9 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -239,4 +239,10 @@ sc_require_stdio_safer:
 	else :;								\
 	fi
 
+# Prefer xnanosleep over other less-precise sleep methods
+sc_prohibit_sleep:
+	@re='\<(nano|u)?sleep \('					\
+	msg='prefer xnanosleep over other sleep interfaces'		\
+	  $(_prohibit_regexp)
+
 include $(srcdir)/dist-check.mk