### Need to set rc ccompiler before enable language
if(WIN32)
SET(CMAKE_RC_COMPILER "windres")
-endif(WIN32)
-project(SimGrid CXX C Fortran)
+endif()
+project(SimGrid C)
+if (enable_gtnets OR enable_ns3)
+ enable_language(CXX)
+endif()
+if (NOT DEFINED enable_smpi OR enable_smpi) # smpi is enabled by default
+ # Call enable_language(Fortran) in order to load the build rules for
+ # this language, needed by teshsuite/smpi/mpich-test/. Use
+ # CMAKE_FORCE_Fortran_COMPILER to bypass checks for a working
+ # compiler (smpiff don't exist at configure time).
+ include(CMakeForceCompiler)
+ CMAKE_FORCE_Fortran_COMPILER(smpiff smpiff)
+ enable_language(Fortran OPTIONAL)
+endif()
set(CMAKE_C_FLAGS "" CACHE TYPE INTERNAL FORCE)
set(CMAKE_CXX_FLAGS "" CACHE TYPE INTERNAL FORCE)
