set -D_FORTIFY_SOURCE=1 for release builds

Change-Id: Ia3db1632e7f85820e3d45b9d925747f2c4b4eba5

Author: rdementi

CMakeLists.txt

@@ -52,9 +52,9 @@ if(UNIX)  # APPLE, LINUX, FREE_BSD
     message(STATUS "CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}")
 
     set(PCM_OPTIONAL_FLAGS "-Wall")
-    set(CMAKE_CXX_FLAGS_RELEASE "${PCM_OPTIONAL_FLAGS} -O3")
+    set(CMAKE_CXX_FLAGS_RELEASE "${PCM_OPTIONAL_FLAGS} -O3 -D_FORTIFY_SOURCE=1")
     set(CMAKE_CXX_FLAGS_DEBUG "${PCM_OPTIONAL_FLAGS} -O0 -g")
-    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${PCM_OPTIONAL_FLAGS} -O3 -g")
+    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${PCM_OPTIONAL_FLAGS} -O3 -g -D_FORTIFY_SOURCE=1")
     set(CMAKE_C_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
     set(CMAKE_C_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
     set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")