deal with possible RT lib dependency

1 files changed, 55 insertions, 0 deletions

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
+  )