Make sure size_test uses -Wall, -Werror, -Wuninitialized flags

Author: mergennachin

test/CMakeLists.txt

@@ -21,6 +21,8 @@ project(size_test)
 
 set(CMAKE_CXX_STANDARD 17)
 
+add_compile_options("-Wall" "-Werror" "-Wuninitialized")
+
 set(EXECUTORCH_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/..)
 
 include(${EXECUTORCH_ROOT}/build/Utils.cmake)

test/size_test.cpp

@@ -95,7 +95,7 @@ int main(int argc, char** argv) {
   for (size_t i = 0; i < method->outputs_size(); i++) {
     auto output_tensor = output_list[i].toTensor();
     [[maybe_unused]] auto data_output = output_tensor.const_data_ptr<float>();
-    for (size_t j = 0; j < output_list[i].toTensor().numel(); ++j) {
+    for (size_t j = 0; j < (size_t) output_list[i].toTensor().numel(); ++j) {
       ET_LOG(Info, "%f", data_output[j]);
     }
   }