Compilation errors on raspberry pi about hindsight HOT 5 CLOSED

root@hl-mc-9999-dev:~/hindsight/release# make
Scanning dependencies of target hindsight
[  2%] Building C object src/CMakeFiles/hindsight.dir/hindsight.c.o
[  4%] Building C object src/CMakeFiles/hindsight.dir/hs_analysis_plugins.c.o
[  6%] Building C object src/CMakeFiles/hindsight.dir/hs_checkpoint_reader.c.o
[  8%] Building C object src/CMakeFiles/hindsight.dir/hs_checkpoint_writer.c.o
[ 10%] Building C object src/CMakeFiles/hindsight.dir/hs_config.c.o
[ 12%] Building C object src/CMakeFiles/hindsight.dir/hs_heka_message.c.o
[ 14%] Building C object src/CMakeFiles/hindsight.dir/hs_heka_stream_reader.c.o
[ 16%] Building C object src/CMakeFiles/hindsight.dir/hs_input.c.o
[ 18%] Building C object src/CMakeFiles/hindsight.dir/hs_input_plugins.c.o
[ 20%] Building C object src/CMakeFiles/hindsight.dir/hs_logger.c.o
[ 22%] Building C object src/CMakeFiles/hindsight.dir/hs_message_matcher.c.o
[ 24%] Building C object src/CMakeFiles/hindsight.dir/hs_output.c.o
[ 26%] Building C object src/CMakeFiles/hindsight.dir/hs_output_plugins.c.o
[ 28%] Building C object src/CMakeFiles/hindsight.dir/hs_sandbox.c.o
[ 30%] Building C object src/CMakeFiles/hindsight.dir/hs_string_matcher.c.o
[ 32%] Building C object src/CMakeFiles/hindsight.dir/hs_util.c.o
Linking C executable hindsight
CMakeFiles/hindsight.dir/hindsight.c.o: In function `main':
hindsight.c:(.text.startup+0x1ec): undefined reference to `clock_gettime'
CMakeFiles/hindsight.dir/hs_analysis_plugins.c.o: In function `analyze_message':
hs_analysis_plugins.c:(.text+0x830): undefined reference to `clock_gettime'
hs_analysis_plugins.c:(.text+0x850): undefined reference to `clock_gettime'
hs_analysis_plugins.c:(.text+0x8dc): undefined reference to `clock_gettime'
hs_analysis_plugins.c:(.text+0x910): undefined reference to `clock_gettime'
CMakeFiles/hindsight.dir/hs_analysis_plugins.c.o:hs_analysis_plugins.c:(.text+0x934): more undefined references to `clock_gettime' follow
collect2: error: ld returned 1 exit status
src/CMakeFiles/hindsight.dir/build.make:465: recipe for target 'src/hindsight' failed
make[2]: *** [src/hindsight] Error 1
CMakeFiles/Makefile2:947: recipe for target 'src/CMakeFiles/hindsight.dir/all' failed
make[1]: *** [src/CMakeFiles/hindsight.dir/all] Error 2
Makefile:146: recipe for target 'all' failed
make: *** [all] Error 2

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f52b5bc..8c8541d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,11 +18,13 @@ if(CMAKE_HOST_UNIX)
   find_library(PTHREAD_LIBRARY pthread)
   find_library(LIBDL_LIBRARY dl)
   find_library(LIBM_LIBRARY m)
+  find_library(LIBRT_LIBRARY rt)

   set(UNIX_LIBRARIES
   ${PTHREAD_LIBRARY}
   ${LIBDL_LIBRARY}
-  ${LIBM_LIBRARY})
+  ${LIBM_LIBRARY}
+  ${LIBRT_LIBRARY})
   add_definitions(-D_POSIX_C_SOURCE=199309L -D_XOPEN_SOURCE=600)
 endif()