+ -> Clean Build (all transports) :
+ $ scons TARGET_OS=tizen TARGET_TRANSPORT=ALL -c (for clean)
+
+(we provide the spec file required by gbs tool at toools/tizen directory.
+gbs is default build tool for Tizen platform, we can refer the following
+wiki to setup Tizen development environment:
+https://source.tizen.org/documentation/developer-guide/getting-started-guide)
+
+Arduino:
+ * Possible values for <TARGET_TRANSPORT> are: IP, BLE
+ * Possible values for <TARGET_ARCH> are: arv, arm
+ (arv: arduino due, arm: arduino mega)
+ * Possible values for <BOARD> are: arduino_due_x_dbg, arduino_due_x, mega
+ * Possible values for <SHIELD> are: ETH, WIFI
+ (It is required in the case of the arduino due.)
+
+ 1. Go to root directory
+ $ cd <top directory of the project>
+ $ sudo apt-get install dos2unix
+
+ 2. Execute following command(s) to start build based on transport selection required
+
+ -> Building for a specific transport :
+ $ scons TARGET_OS=arduino TARGET_ARCH=xxx BOARD=yyy SHIELD=zzz
+
+(To get allowed values run: scons TARGET_OS=arduino TARGET_ARCH=xxx SHIELD=zzz -h.
+You may see a option 'CPU' in the output of above command line, that's due to
+some boards have different processors, to specify the processor, add 'CPU=zzz'
+in the command line. If no 'CPU' option exists, that means the board only
+support one kind of processor, it's unnecessary to specify it)
+
+Mac OSX:
+ * Possible values for <SYS_VERSION> are: OSX version, e.g. 10.9
+
+ 1. Go to root directory
+ $ cd <top directory of the project>
+
+ 2. Execute following command(s) to start build based on transport selection required
+
+ -> Building for a specific transport :
+ $ scons SYS_VERSION=yyy
+
+IOS:
+ * Possible values for <TARGET_ARCH> are: i386, x86_64, armv7, armv7s, arm64
+ * Possible values for <SYS_VERSION> are: IOS version, e.g. 7.0
+
+ 1. Go to root directory
+ $ cd <top directory of the project>
+
+ 2. Execute following command(s) to start build based on transport selection required
+
+ -> Building for a specific transport :
+ $ scons TARGET_OS=ios TARGET_ARCH=xxx SYS_VERSION=yyy
+
+* Additional options
+ * VERBOSE=true or false (Show compilation)
+ * RELEASE=true or false (Build for release?)
+ * LOGGING=true or false (Enable stack logging)
+ * SECURED=1 or 0 (Build with DTLS)
+ * TEST=1 or 0 (Run unit tests)
+ * SECURED=1 or 0 (Build with DTLS)
+ * BUILD_SAMPLE=ON or OFF (Build with sample)
+ * ROUTING=GW or EP (Enable routing)
+ * WITH_TCP=true or false (Enable CoAP over TCP Transport, arduino is not supported)
+ * WITH_RA=true or false (Build with Remote Access module)
+ * WITH_RD=1 or 0 (Build including Resource Directory)
+ * SIMULATOR=true or false (Build with simulator module)
+
+Note1: Currently most IoTivity project doesn't support Windows, so you can't set