+project(SimGrid C)
+if (enable_gtnets OR enable_ns3)
+ enable_language(CXX)
+endif()
+# Workaround for a bug in cmake where enable_language does not work
+# well with OPTIONAL.
+# See http://www.cmake.org/Bug/print_bug_page.php?bug_id=9220
+if(DEFINED CMAKE_Fortran_COMPILER AND CMAKE_Fortran_COMPILER MATCHES "^$")
+ set(CMAKE_Fortran_COMPILER CMAKE_Fortran_COMPILER-NOTFOUND)
+endif()
+enable_language(Fortran OPTIONAL)