--- ray/src/rt/CMakeLists.txt	2012/07/31 16:52:32	1.8
+++ ray/src/rt/CMakeLists.txt	2014/03/20 22:49:21	1.9
@@ -22,6 +22,15 @@ target_link_libraries(rtrace raycalls radiance rtrad)
 
 add_executable(rpict rpmain.c rpict.c srcdraw.c duphead.c persist.c)
 target_link_libraries(rpict radiance rtrad)
+
+add_executable(lookamb lookamb.c ambio.c)
+target_link_libraries(lookamb rtrad)
+
+add_executable(rcontrib rcmain.c rcontrib.c rc2.c rc3.c)
+target_link_libraries(rcontrib radiance rtrad)
+
+set(targets_to_install lookamb radiance raycalls rtrace rpict rcontrib)
+
 if(X11_FOUND)
   set(X11_SOURCES x11.c x11twind.c)
   add_definitions("-DHAS_X11")
@@ -29,26 +38,24 @@ endif()
 if(QT4_FOUND)
   add_definitions("-DHAS_QT")
 endif()
-add_executable(rvu
-  rvmain.c rview.c rv2.c rv3.c devtable.c devcomm.c editline.c ${X11_SOURCES}
-  colortab.c)
-target_link_libraries(rvu raycalls radiance rtrad ${X11_LIBRARIES})
-# only link to rvu-qt-lib if qt is found
-if(QT4_FOUND)
-  target_link_libraries(rvu qtrvu)
+if (X11_FOUND OR QT4_FOUND)
+  add_executable(rvu
+    rvmain.c rview.c rv2.c rv3.c devtable.c devcomm.c editline.c ${X11_SOURCES}
+    colortab.c)
+  target_link_libraries(rvu raycalls radiance rtrad ${X11_LIBRARIES})
+  list(APPEND targets_to_install rvu)
+
+  # only link to rvu-qt-lib if qt is found
+  if(QT4_FOUND)
+    target_link_libraries(rvu qtrvu)
+  endif()
 endif()
 
-add_executable(lookamb lookamb.c ambio.c)
-target_link_libraries(lookamb rtrad)
-
-add_executable(rcontrib rcmain.c rcontrib.c rc2.c rc3.c)
-target_link_libraries(rcontrib radiance rtrad)
-
 add_test(rtrace_Version ${EXECUTABLE_OUTPUT_PATH}/rtrace -version)
 set_tests_properties(rtrace_Version PROPERTIES
   PASS_REGULAR_EXPRESSION "RADIANCE")
 
-install(TARGETS lookamb radiance raycalls rtrace rpict rvu rcontrib
+install(TARGETS ${targets_to_install}
         RUNTIME DESTINATION bin
         LIBRARY DESTINATION bin
         ARCHIVE DESTINATION bin)