+
+##
+## Check the C/C++ standard that we need
+## See also buildtools/Cmake/Flags.cmake that sets our paranoid warning flags
+
+enable_language(CXX)
+
+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).")