Fix example build (intel#114)

example/vcpkg/CMakeLists.txt

@@ -5,6 +5,16 @@ project(hexl_example LANGUAGES C CXX)
 cmake_minimum_required(VERSION 3.13)
 set(CMAKE_CXX_STANDARD 11)
 
+# Setting Release as default mode. Otherwise vcpkg uses debug mode by default.
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Build type" FORCE)
+endif()
+
+# This flag is needed to build HEXL on Debug mode
+if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(CMAKE_CXX_FLAGS "-fsanitize=address")
+endif()
+
 # Example using vcpkg
 find_package(HEXL CONFIG REQUIRED)
 add_executable(example ../example.cpp)