From 561618b2b28623d42113bd6f44ed272705b64b22 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Tue, 8 Oct 2013 11:49:07 +1100
Subject: [PATCH] build: added -lrt for Linux build

---
 mk/board_avr_sitl.mk | 2 +-
 mk/board_linux.mk    | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/mk/board_avr_sitl.mk b/mk/board_avr_sitl.mk
index 98f31487e1..8e85f64e61 100644
--- a/mk/board_avr_sitl.mk
+++ b/mk/board_avr_sitl.mk
@@ -39,7 +39,7 @@ ifneq ($(SYSTYPE),Darwin)
 LDFLAGS        +=   -Wl,--gc-sections -Wl,-Map -Wl,$(SKETCHMAP)
 endif
 
-LIBS = -lm -lpthread
+LIBS ?= -lm -lpthread
 
 ifeq ($(VERBOSE),)
 v = @
diff --git a/mk/board_linux.mk b/mk/board_linux.mk
index 031d835f99..31a7cb69e1 100644
--- a/mk/board_linux.mk
+++ b/mk/board_linux.mk
@@ -4,4 +4,5 @@ include $(MK_DIR)/find_tools.mk
 
 # Linux build is just the same as SITL for now
 OPTFLAGS = -O0
+LIBS = -lm -lpthread -lrt
 include $(MK_DIR)/board_avr_sitl.mk