Optimize sandbox-exec size

Author: adrien1018

CMakeLists.txt

@@ -100,7 +100,7 @@ install(TARGETS default-scoring DESTINATION "${TIOJ_DATA_DIR}/")
 add_executable(sandbox-exec "src/tioj/sandbox_main.cpp" "src/tioj/sandbox.cpp" "src/tioj/sandbox.h")
 target_link_libraries(sandbox-exec CJail::libcjail)
 target_compile_options(sandbox-exec PUBLIC -Os -static) # note that later flags will override previous ones
-target_link_options(sandbox-exec PUBLIC -static -pthread)
+target_link_options(sandbox-exec PUBLIC -static -pthread -Wl,--gc-sections)
 install(TARGETS sandbox-exec DESTINATION "${TIOJ_DATA_DIR}/")
 
 # headers for judge

src/server_io.h

@@ -4,7 +4,7 @@
 #include <string>
 #include "tioj/submission.h"
 
-const std::string kVersionCode = "1.2.0";
+const std::string kVersionCode = "1.2.1";
 extern std::string kTIOJUrl;
 extern std::string kTIOJKey;
 extern size_t kMaxQueue;