more right way to check if compiler support c++11

cmake/compiler.cmake

@@ -0,0 +1,35 @@
+function(append value)
+  foreach(variable ${ARGN})
+    set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
+  endforeach(variable)
+endfunction()
+
+include(CheckCXXCompilerFlag)
+
+if (NOT DEFINED SDCV_COMPILER_IS_GCC_COMPATIBLE)
+  if (CMAKE_COMPILER_IS_GNUCXX)
+    set(SDCV_COMPILER_IS_GCC_COMPATIBLE ON)
+  elseif (MSVC)
+    set(SDCV_COMPILER_IS_GCC_COMPATIBLE OFF)
+  elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    set (SDCV_COMPILER_IS_GCC_COMPATIBLE ON)
+  endif()
+endif()
+
+if (MSVC AND (MSVC_VERSION LESS 1900))
+  message(FATAL_ERROR "MSVC version ${MSVC_VERSION} have no full c++11 support")
+elseif (MSVC)
+  add_definitions(-DNOMINMAX)
+elseif (NOT MSVC)
+  check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
+  if (CXX_SUPPORTS_CXX11)
+    append("-std=c++11" CMAKE_CXX_FLAGS)
+  else ()
+    message(FATAL_ERROR "sdcv requires C++11 support but the '-std=c++11' flag isn't supported.")
+  endif()
+endif ()
+
+if (SDCV_COMPILER_IS_GCC_COMPATIBLE)
+  append("-Wall" "-Wextra" "-Wformat-security" "-Wcast-align" "-Werror=format" "-Wcast-qual" CMAKE_C_FLAGS)
+  append("-Wall" "-pedantic" "-Wextra" "-Wformat-security" "-Wcast-align" "-Werror=format" "-Wcast-qual" CMAKE_CXX_FLAGS)
+endif ()