From 5eb2eb6693340c14766876bce705e3adb8733796 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@allegro.clab.cs.cmu.edu>
Date: Thu, 5 Mar 2015 00:14:16 -0500
Subject: deal with possible RT lib dependency

---
 cmake/FindRT.cmake     | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++
 decoder/CMakeLists.txt |  4 ++--
 klm/lm/CMakeLists.txt  |  6 ++++--
 3 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 cmake/FindRT.cmake

diff --git a/cmake/FindRT.cmake b/cmake/FindRT.cmake
new file mode 100644
index 00000000..55ae1a26
--- /dev/null
+++ b/cmake/FindRT.cmake
@@ -0,0 +1,55 @@
+# - Check for the presence of RT
+#
+# The following variables are set when RT is found:
+#  HAVE_RT       = Set to true, if all components of RT
+#                          have been found.
+#  RT_INCLUDES   = Include path for the header files of RT
+#  RT_LIBRARIES  = Link these to use RT
+
+## -----------------------------------------------------------------------------
+## Check for the header files
+
+find_path (RT_INCLUDES time.h
+  PATHS /usr/local/include /usr/include ${CMAKE_EXTRA_INCLUDES}
+  )
+
+## -----------------------------------------------------------------------------
+## Check for the library
+
+find_library (RT_LIBRARIES rt
+  PATHS /usr/local/lib /usr/lib /lib ${CMAKE_EXTRA_LIBRARIES}
+  )
+
+## -----------------------------------------------------------------------------
+## Actions taken when all components have been found
+
+if (RT_INCLUDES AND RT_LIBRARIES)
+  set (HAVE_RT TRUE)
+else (RT_INCLUDES AND RT_LIBRARIES)
+  if (NOT RT_FIND_QUIETLY)
+    if (NOT RT_INCLUDES)
+      message (STATUS "Unable to find RT header files!")
+    endif (NOT RT_INCLUDES)
+    if (NOT RT_LIBRARIES)
+      message (STATUS "Unable to find RT library files!")
+    endif (NOT RT_LIBRARIES)
+  endif (NOT RT_FIND_QUIETLY)
+endif (RT_INCLUDES AND RT_LIBRARIES)
+
+if (HAVE_RT)
+  if (NOT RT_FIND_QUIETLY)
+    message (STATUS "Found components for RT")
+    message (STATUS "RT_INCLUDES = ${RT_INCLUDES}")
+    message (STATUS "RT_LIBRARIES = ${RT_LIBRARIES}")
+  endif (NOT RT_FIND_QUIETLY)
+else (HAVE_RT)
+  if (RT_FIND_REQUIRED)
+    message (FATAL_ERROR "Could not find RT!")
+  endif (RT_FIND_REQUIRED)
+endif (HAVE_RT)
+
+mark_as_advanced (
+  HAVE_RT
+  RT_LIBRARIES
+  RT_INCLUDES
+  )
diff --git a/decoder/CMakeLists.txt b/decoder/CMakeLists.txt
index f7683887..ac07e9fe 100644
--- a/decoder/CMakeLists.txt
+++ b/decoder/CMakeLists.txt
@@ -3,10 +3,10 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../mteval)
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../klm)
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/..)
 
-set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-
 PROJECT(decoder C CXX)
 
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
 find_package(FLEX REQUIRED)
 
 FLEX_TARGET(RuleLexer rule_lexer.ll ${CMAKE_CURRENT_BINARY_DIR}/rule_lexer.cc)
diff --git a/klm/lm/CMakeLists.txt b/klm/lm/CMakeLists.txt
index 5814b623..b95cddee 100644
--- a/klm/lm/CMakeLists.txt
+++ b/klm/lm/CMakeLists.txt
@@ -1,13 +1,15 @@
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/..)
 
+find_package(RT)
+
 set(build_binary_SRCS build_binary_main.cc)
 add_executable(build_binary ${build_binary_SRCS})
-target_link_libraries(build_binary klm klm_util klm_util_double z)
+target_link_libraries(build_binary klm klm_util klm_util_double z ${RT_LIBRARIES})
 
 
 set(ngram_query_SRCS query_main.cc)
 add_executable(ngram_query ${ngram_query_SRCS})
-target_link_libraries(ngram_query klm klm_util klm_util_double z)
+target_link_libraries(ngram_query klm klm_util klm_util_double z ${RT_LIBRARIES})
 
 set(klm_STAT_SRCS
     bhiksha.hh
-- 
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