BUILD: makefile: support RT_LDFLAGS

The LDFLAGS appended by USE_RT can now be overridden using
RT_LDFLAGS.

diff --git a/Makefile b/Makefile
index a5235530d5573ed541223ac7940613f4ecde7664..63c7f788bba70643a6be371110e6e5ab734698dc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -544,7 +544,7 @@ ifneq ($(USE_EVPORTS),)
 endif
 
 ifneq ($(USE_RT),)
-  OPTIONS_LDFLAGS += -lrt
+  RT_LDFLAGS = -lrt
 endif
 
 ifneq ($(USE_THREAD),)