Exclude building these samples for ARM.

samples/CMakeLists.txt

@@ -3,5 +3,37 @@
 
 cmake_minimum_required(VERSION 2.8.11)
 
+function(detect_architecture symbol arch) 
+    if (NOT DEFINED ARCHITECTURE OR ARCHITECTURE STREQUAL "")
+        set(CMAKE_REQUIRED_QUIET 1)
+        check_symbol_exists("${symbol}" "" ARCHITECTURE_${arch}) 
+        unset(CMAKE_REQUIRED_QUIET) 
+  
+        # The output variable needs to be unique across invocations otherwise 
+        # CMake's crazy scope rules will keep it defined 
+        if (ARCHITECTURE_${arch}) 
+            set(ARCHITECTURE "${arch}" PARENT_SCOPE)
+            set(ARCHITECTURE_${arch} 1 PARENT_SCOPE)
+            add_definitions(-DARCHITECTURE_${arch}=1) 
+        endif()
+    endif()
+endfunction()
+
+if (MSVC)
+    detect_architecture("_M_AMD64" x86_64)
+    detect_architecture("_M_IX86" x86)
+    detect_architecture("_M_ARM" ARM)
+else() 
+    detect_architecture("__x86_64__" x86_64)
+    detect_architecture("__i386__" x86)
+    detect_architecture("__arm__" ARM)
+endif() 
+if (NOT DEFINED ARCHITECTURE OR ARCHITECTURE STREQUAL "") 
+    set(ARCHITECTURE "GENERIC") 
+endif() 
+message(STATUS "iothub architecture: ${ARCHITECTURE}")
+
+if (NOT ("${ARCHITECTURE}" STREQUAL "ARM"))
 add_subdirectory(socketio_connect)
 add_subdirectory(tlsio_connect)
+endif()