http://public.kitware.com/Bug/view.php?id=11910
--- Modules/FindOpenMP.cmake	2011-03-01 17:34:59.000000000 +0900
+++ Modules/FindOpenMP.cmake	2011-03-01 17:35:26.000000000 +0900
@@ -72,41 +72,53 @@
 endif(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS)
 
 # check c compiler
-foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
-  set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${FLAG}")
-  unset(OpenMP_FLAG_DETECTED CACHE)
-  message(STATUS "Try OpenMP C flag = [${FLAG}]")
-  check_c_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
-  set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
-  if(OpenMP_FLAG_DETECTED)
-    set(OpenMP_C_FLAGS_INTERNAL "${FLAG}")
-    break()
-  endif(OpenMP_FLAG_DETECTED) 
-endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
+IF (CMAKE_C_COMPILER)
+  foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
+    set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+    set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+    unset(OpenMP_FLAG_DETECTED CACHE)
+    message(STATUS "Try OpenMP C flag = [${FLAG}]")
+    check_c_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
+    set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
+    if(OpenMP_FLAG_DETECTED)
+      set(OpenMP_C_FLAGS_INTERNAL "${FLAG}")
+      break()
+    endif(OpenMP_FLAG_DETECTED) 
+  endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
+ENDIF (CMAKE_C_COMPILER)
 
 # check cxx compiler
-foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
-  set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${FLAG}")
-  unset(OpenMP_FLAG_DETECTED CACHE)
-  message(STATUS "Try OpenMP CXX flag = [${FLAG}]")
-  check_cxx_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
-  set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
-  if(OpenMP_FLAG_DETECTED)
-    set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}")
-    break()
-  endif(OpenMP_FLAG_DETECTED)
-endforeach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
+IF (CMAKE_CXX_COMPILER)
+  foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
+    set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+    set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+    unset(OpenMP_FLAG_DETECTED CACHE)
+    message(STATUS "Try OpenMP CXX flag = [${FLAG}]")
+    check_cxx_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
+    set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
+    if(OpenMP_FLAG_DETECTED)
+      set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}")
+      break()
+    endif(OpenMP_FLAG_DETECTED)
+  endforeach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
+ENDIF (CMAKE_CXX_COMPILER)
 
 set(OpenMP_C_FLAGS "${OpenMP_C_FLAGS_INTERNAL}"
   CACHE STRING "C compiler flags for OpenMP parallization")
 
 set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}"
   CACHE STRING "C++ compiler flags for OpenMP parallization")
+
 # handle the standard arguments for find_package
-find_package_handle_standard_args(OpenMP DEFAULT_MSG 
-  OpenMP_C_FLAGS OpenMP_CXX_FLAGS )
+IF (CMAKE_C_COMPILER)
+  find_package_handle_standard_args(OpenMP DEFAULT_MSG 
+    OpenMP_C_FLAGS )
+ENDIF (CMAKE_C_COMPILER)
+
+IF (CMAKE_CXX_COMPILER)
+  find_package_handle_standard_args(OpenMP DEFAULT_MSG 
+    OpenMP_CXX_FLAGS )
+ENDIF (CMAKE_CXX_COMPILER)
 
 mark_as_advanced(
   OpenMP_C_FLAGS