+
+##
+## Check the C/C++ standard that we need
+## See also tools/cmake/GCCFlags.cmake that sets our paranoid warning flags
+if (MSVC)
+ message("-- You are compiling SimGrid with MicroSoft Visual C. Good luck.")
+
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_SCL_SECURE_NO_WARNINGS")
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_SCL_SECURE_NO_WARNINGS")
+else() # gcc or clang
+ INCLUDE(CheckCCompilerFlag)
+ CHECK_C_COMPILER_FLAG(-fstack-cleaner HAVE_C_STACK_CLEANER)
+
+ ## Request full debugging flags
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g3")
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
+ set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -g")
+
+ if (CMAKE_COMPILER_IS_GNUCC)
+ if (COMPILER_CXX_VERSION_MAJOR_MINOR STRLESS "4.7")
+ message(FATAL_ERROR
+ "SimGrid needs at least g++ version 4.7 to compile "
+ "(c++11 support of previous versions is too limited).")
+ endif()
+ endif()
+
+ ## We need a decent support of the c++11 standard
+ include(CheckCXXCompilerFlag)
+ CHECK_CXX_COMPILER_FLAG("-std=gnu++11" COMPILER_SUPPORTS_CXX11)
+ if(COMPILER_SUPPORTS_CXX11)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
+ else()
+ message(FATAL_ERROR
+ "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. "
+ "Please use a decent C++ compiler.")
+ endif()
+
+ ### And we need C11 standard, too
+ include(CheckCCompilerFlag)
+ CHECK_C_COMPILER_FLAG("-std=gnu11" COMPILER_SUPPORTS_C11)
+ if(COMPILER_SUPPORTS_C11)
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11")
+ else()
+ message(FATAL_ERROR
+ "The compiler ${CMAKE_C_COMPILER} has no C11 support. "
+ "Please use a decent C compiler "
+ "(note that c++11 support of ${CMAKE_CXX_COMPILER} seems ok).")
+ endif()
+ if(APPLE AND ("4.6" GREATER COMPILER_C_VERSION_MAJOR_MINOR))
+ ### gcc 4.[1-5] cannot compile ucontext on OSX
+ message(STATUS "Ucontext can't be used with this version of gcc (must be greater than 4.5)")
+ set(HAVE_UCONTEXT_H 0)
+ endif()
+endif() # NOT MSVC
+
+### SMPI vs. Fortran
+if ((NOT DEFINED enable_smpi OR enable_smpi) AND NOT APPLE) # smpi is enabled by default
+ # Call enable_language(Fortran) in order to load the build rules for
+ # this language, needed by teshsuite/smpi/mpich-test/. Use
+ # CMAKE_FORCE_Fortran_COMPILER to bypass checks for a working
+ # compiler (smpiff don't exist at configure time).
+ include(CMakeForceCompiler)
+ if(NOT COMMAND CMAKE_FORCE_Fortran_COMPILER)
+ MACRO(CMAKE_FORCE_Fortran_COMPILER compiler id)
+ SET(CMAKE_Fortran_COMPILER "${compiler}")
+ SET(CMAKE_Fortran_COMPILER_ID_RUN TRUE)
+ SET(CMAKE_Fortran_COMPILER_ID ${id})
+ SET(CMAKE_Fortran_COMPILER_WORKS TRUE)
+ SET(CMAKE_Fortran_COMPILER_FORCED TRUE)
+
+ # Set old compiler id variables.
+ IF("${CMAKE_Fortran_COMPILER_ID}" MATCHES "GNU")
+ SET(CMAKE_COMPILER_IS_GNUG77 1)
+ ENDIF("${CMAKE_Fortran_COMPILER_ID}" MATCHES "GNU")
+ ENDMACRO(CMAKE_FORCE_Fortran_COMPILER)
+ endif()
+ CMAKE_FORCE_Fortran_COMPILER(smpiff smpiff)
+ enable_language(Fortran OPTIONAL)