-lrt

.travis.yml

@@ -10,6 +10,7 @@ os:
   #- pip install --user cpp-coveralls
 
 script:
+    - ./configure
     - make unittest
     - make all
 

Makefile.in

@@ -159,7 +159,10 @@ else
 ifeq ($(OS), Android)
 	LDFLAGS += -lstdc++ -lm -llog -ldl
 else
-	LDFLAGS += -lstdc++ -lpthread -lm -ldl -lrt
+	LDFLAGS += -lstdc++ -lpthread -lm -ldl
+ifneq ($(findstring gcc, $(CC)), )
+	LDFLAGS += -lrt # for clock_gettime, clang not -lrt
+endif
 endif
 endif