A tool in jerry-ext: arg transformer for binding

It provides some APIs for binding developers, so that
they can validate the type of the js argument and convert/assign them
to the native argument.

Related Issue: #1716

JerryScript-DCO-1.0-Signed-off-by: Martijn The martijn.the@intel.com
JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang zidong.jiang@intel.com

Author: jiangzidong

CMakeLists.txt

@@ -26,6 +26,7 @@ set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS )
 set(JERRY_CMDLINE         ON  CACHE BOOL "Build jerry command line tool?")
 set(JERRY_CMDLINE_MINIMAL OFF CACHE BOOL "Build jerry minimal command line tool?")
 set(JERRY_PORT_DEFAULT    ON  CACHE BOOL "Build default jerry port implementation?")
+set(JERRY_EXT             ON  CACHE BOOL "Build jerry-ext?")
 set(JERRY_LIBC            ON  CACHE BOOL "Build and use jerry-libc?")
 set(JERRY_LIBM            ON  CACHE BOOL "Build and use jerry-libm?")
 set(UNITTESTS             OFF CACHE BOOL "Build unit tests?")
@@ -94,6 +95,7 @@ message(STATUS "ENABLE_STRIP              " ${ENABLE_STRIP} ${ENABLE_STRIP_MESSA
 message(STATUS "JERRY_CMDLINE             " ${JERRY_CMDLINE})
 message(STATUS "JERRY_CMDLINE_MINIMAL     " ${JERRY_CMDLINE_MINIMAL})
 message(STATUS "JERRY_PORT_DEFAULT        " ${JERRY_PORT_DEFAULT} ${JERRY_PORT_DEFAULT_MESSAGE})
+message(STATUS "JERRY_EXT                 " ${JERRY_EXT} ${JERRY_EXT_MESSAGE})
 message(STATUS "JERRY_LIBC                " ${JERRY_LIBC} ${JERRY_LIBC_MESSAGE})
 message(STATUS "JERRY_LIBM                " ${JERRY_LIBM} ${JERRY_LIBM_MESSAGE})
 message(STATUS "UNITTESTS                 " ${UNITTESTS})
@@ -238,6 +240,11 @@ if(JERRY_PORT_DEFAULT)
   add_subdirectory(jerry-port/default)
 endif()
 
+# Jerry's extension tools
+if(JERRY_EXT)
+  add_subdirectory(jerry-ext)
+endif()
+
 # Jerry command line tool
 if(JERRY_CMDLINE OR JERRY_CMDLINE_MINIMAL)
   add_subdirectory(jerry-main)
@@ -249,4 +256,7 @@ if(UNITTESTS)
   if(JERRY_LIBM)
     add_subdirectory(tests/unit-libm)
   endif()
+  if(JERRY_EXT)
+    add_subdirectory(tests/unit-ext)
+  endif()
 endif()