document modules; fixes #7

modules/omp.cmake

@@ -1,9 +1,38 @@
+#.rst:
+#
+# Enables OpenMP support.
+#
+# Variables used::
+#
+#   ENABLE_OPENMP
+#   OPENMP_FOUND
+#
+# Variables modified (provided the corresponding language is enabled)::
+#
+#   CMAKE_Fortran_FLAGS
+#   CMAKE_C_FLAGS
+#   CMAKE_CXX_FLAGS
+#
+# Example autocmake.cfg entry::
+#
+#   [omp]
+#   source: https://github.com/scisoft/autocmake/raw/master/modules/omp.cmake
+#   docopt: --omp Enable OpenMP parallelization [default: False].
+#   define: '-DENABLE_OPENMP=%s' % arguments['--omp']
+
 option(ENABLE_OPENMP "Enable OpenMP parallelization" OFF)
 
 if(ENABLE_OPENMP)
     find_package(OpenMP)
     if(OPENMP_FOUND)
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
-        set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${OpenMP_C_FLAGS}")
+        if(DEFINED CMAKE_Fortran_COMPILER_ID)
+            set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${OpenMP_C_FLAGS}")
+        endif()
+        if(DEFINED CMAKE_C_COMPILER_ID)
+            set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
+        endif()
+        if(DEFINED CMAKE_CXX_COMPILER_ID)
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+        endif()
     endif()
 endif()