Add CMAKE_CXX_FLAGS for Intel compiler

Author: ds283

CMakeLists.txt

@@ -110,6 +110,13 @@ elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wconversion -Wshadow -Wextra -Werror=conversion")
   # not yet ready for -Wsign-conversion
 
+  if (JSONCPP_WITH_STRICT_ISO AND NOT JSONCPP_WITH_WARNING_AS_ERROR)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic")
+  endif ()
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+  # using Intel compiler
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wconversion -Wshadow -Wextra -Werror=conversion")
+
   if (JSONCPP_WITH_STRICT_ISO AND NOT JSONCPP_WITH_WARNING_AS_ERROR)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic")
   endif ()