chore: Update compiler flags for security enhancements

As title

Log: Update compiler flags for security enhancements
Bug: https://pms.uniontech.com/bug-view-342665.html

Author: wangrong1069

CMakeLists.txt

@@ -17,6 +17,17 @@ set(CMAKE_AUTOUIC ON)
 set(CMAKE_AUTORCC ON)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 
+if(CMAKE_BUILD_TYPE STREQUAL "Release")
+    message("Enable build hardening.")
+
+    set(CMAKE_VERBOSE_MAKEFILE ON)
+
+    set(HARDENING_FLAGS "-Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=${CMAKE_SOURCE_DIR}=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${HARDENING_FLAGS}")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${HARDENING_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-z,relro -Wl,-z,now")
+endif()
+
 if (${CMAKE_SYSTEM_PROCESSOR} MATCHES "sw_64")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mieee")
 endif ()