diff --git a/src/xenia/debug/ui/premake5.lua b/src/xenia/debug/ui/premake5.lua
index cfa983f55..02ba6a81f 100644
--- a/src/xenia/debug/ui/premake5.lua
+++ b/src/xenia/debug/ui/premake5.lua
@@ -7,17 +7,13 @@ project("xenia-debug-ui")
   kind("StaticLib")
   language("C++")
   links({
-    "glew",
     "imgui",
     "xenia-base",
     "xenia-cpu",
     "xenia-debug",
     "xenia-ui",
-    "xenia-ui-gl",
   })
   defines({
-    "GLEW_STATIC=1",
-    "GLEW_MX=1",
   })
   includedirs({
     project_root.."/third_party/gflags/src",
diff --git a/src/xenia/kernel/util/shim_utils.h b/src/xenia/kernel/util/shim_utils.h
index 42b7b9070..5717be1d9 100644
--- a/src/xenia/kernel/util/shim_utils.h
+++ b/src/xenia/kernel/util/shim_utils.h
@@ -16,6 +16,7 @@
 #include <string>
 
 #include "xenia/base/byte_order.h"
+#include "xenia/base/logging.h"
 #include "xenia/base/memory.h"
 #include "xenia/base/string_buffer.h"
 #include "xenia/cpu/export_resolver.h"
@@ -29,7 +30,7 @@ namespace kernel {
 
 using PPCContext = xe::cpu::ppc::PPCContext;
 
-#define SHIM_CALL void _cdecl
+#define SHIM_CALL void __cdecl
 #define SHIM_SET_MAPPING(library_name, export_name, shim_data) \
   export_resolver->SetFunctionMapping(                         \
       library_name, ordinals::export_name,                     \
@@ -403,7 +404,7 @@ void PrintKernelCall(cpu::Export* export_entry, const Tuple& params) {
   string_buffer.Append('(');
   AppendKernelCallParams(string_buffer, export_entry, params);
   string_buffer.Append(')');
-  if (export_entry->tags & ExportTag::kImportant) {
+  if (export_entry->tags & xe::cpu::ExportTag::kImportant) {
     xe::LogLine('i', string_buffer.GetString(), string_buffer.length());
   } else {
     xe::LogLine('d', string_buffer.GetString(), string_buffer.length());
@@ -418,9 +419,9 @@ auto KernelTrampoline(F&& f, Tuple&& t, std::index_sequence<I...>) {
 template <KernelModuleId MODULE, uint16_t ORDINAL, typename R, typename... Ps>
 xe::cpu::Export* RegisterExport(R (*fn)(Ps&...), const char* name,
                                 xe::cpu::ExportTag::type tags) {
-  static const auto export_entry =
-      new cpu::Export(ORDINAL, xe::cpu::Export::Type::kFunction, name,
-                      tags | ExportTag::kImplemented | ExportTag::kLog);
+  static const auto export_entry = new cpu::Export(
+      ORDINAL, xe::cpu::Export::Type::kFunction, name,
+      tags | xe::cpu::ExportTag::kImplemented | xe::cpu::ExportTag::kLog);
   static R (*FN)(Ps&...) = fn;
   struct X {
     static void Trampoline(PPCContext* ppc_context) {
@@ -429,8 +430,8 @@ xe::cpu::Export* RegisterExport(R (*fn)(Ps&...), const char* name,
           ppc_context, sizeof...(Ps), 0,
       };
       auto params = std::make_tuple<Ps...>(Ps(init)...);
-      if (export_entry->tags & ExportTag::kLog &&
-          (!(export_entry->tags & ExportTag::kHighFrequency) ||
+      if (export_entry->tags & xe::cpu::ExportTag::kLog &&
+          (!(export_entry->tags & xe::cpu::ExportTag::kHighFrequency) ||
            FLAGS_log_high_frequency_kernel_calls)) {
         PrintKernelCall(export_entry, params);
       }
@@ -438,7 +439,8 @@ xe::cpu::Export* RegisterExport(R (*fn)(Ps&...), const char* name,
           KernelTrampoline(FN, std::forward<std::tuple<Ps...>>(params),
                            std::make_index_sequence<sizeof...(Ps)>());
       result.Store(ppc_context);
-      if (export_entry->tags & (ExportTag::kLog | ExportTag::kLogResult)) {
+      if (export_entry->tags &
+          (xe::cpu::ExportTag::kLog | xe::cpu::ExportTag::kLogResult)) {
         // TODO(benvanik): log result.
       }
     }
@@ -450,9 +452,9 @@ xe::cpu::Export* RegisterExport(R (*fn)(Ps&...), const char* name,
 template <KernelModuleId MODULE, uint16_t ORDINAL, typename... Ps>
 xe::cpu::Export* RegisterExport(void (*fn)(Ps&...), const char* name,
                                 xe::cpu::ExportTag::type tags) {
-  static const auto export_entry =
-      new cpu::Export(ORDINAL, xe::cpu::Export::Type::kFunction, name,
-                      tags | ExportTag::kImplemented | ExportTag::kLog);
+  static const auto export_entry = new cpu::Export(
+      ORDINAL, xe::cpu::Export::Type::kFunction, name,
+      tags | xe::cpu::ExportTag::kImplemented | xe::cpu::ExportTag::kLog);
   static void (*FN)(Ps&...) = fn;
   struct X {
     static void Trampoline(PPCContext* ppc_context) {
@@ -461,8 +463,8 @@ xe::cpu::Export* RegisterExport(void (*fn)(Ps&...), const char* name,
           ppc_context, sizeof...(Ps),
       };
       auto params = std::make_tuple<Ps...>(Ps(init)...);
-      if (export_entry->tags & ExportTag::kLog &&
-          (!(export_entry->tags & ExportTag::kHighFrequency) ||
+      if (export_entry->tags & xe::cpu::ExportTag::kLog &&
+          (!(export_entry->tags & xe::cpu::ExportTag::kHighFrequency) ||
            FLAGS_log_high_frequency_kernel_calls)) {
         PrintKernelCall(export_entry, params);
       }
diff --git a/src/xenia/kernel/util/xex2.cc b/src/xenia/kernel/util/xex2.cc
index 5a8620907..2525d6c39 100644
--- a/src/xenia/kernel/util/xex2.cc
+++ b/src/xenia/kernel/util/xex2.cc
@@ -869,9 +869,17 @@ int xe_xex2_load_pe(xe_xex2_ref xex) {
   // IAT              Import Address Table ptr
   // opthdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_X].VirtualAddress / .Size
 
+// The macros in pe_image.h don't work with clang, for some reason.
+// offsetof seems to be unable to find OptionalHeader.
+#define offsetof1(type, member) ((std::size_t) & (((type*)0)->member))
+#define IMAGE_FIRST_SECTION1(ntheader)                                   \
+  ((PIMAGE_SECTION_HEADER)(                                              \
+      (uint8_t*)ntheader + offsetof1(IMAGE_NT_HEADERS, OptionalHeader) + \
+      ((PIMAGE_NT_HEADERS)(ntheader))->FileHeader.SizeOfOptionalHeader))
+
   // Quick scan to determine bounds of sections.
   size_t upper_address = 0;
-  const IMAGE_SECTION_HEADER* sechdr = IMAGE_FIRST_SECTION(nthdr);
+  const IMAGE_SECTION_HEADER* sechdr = IMAGE_FIRST_SECTION1(nthdr);
   for (size_t n = 0; n < filehdr->NumberOfSections; n++, sechdr++) {
     const size_t physical_address = opthdr->ImageBase + sechdr->VirtualAddress;
     upper_address =
@@ -879,7 +887,7 @@ int xe_xex2_load_pe(xe_xex2_ref xex) {
   }
 
   // Setup/load sections.
-  sechdr = IMAGE_FIRST_SECTION(nthdr);
+  sechdr = IMAGE_FIRST_SECTION1(nthdr);
   for (size_t n = 0; n < filehdr->NumberOfSections; n++, sechdr++) {
     PESection* section = (PESection*)calloc(1, sizeof(PESection));
     memcpy(section->name, sechdr->Name, sizeof(sechdr->Name));
diff --git a/src/xenia/kernel/xam/xam_content.cc b/src/xenia/kernel/xam/xam_content.cc
index 6c453be71..86aad86b3 100644
--- a/src/xenia/kernel/xam/xam_content.cc
+++ b/src/xenia/kernel/xam/xam_content.cc
@@ -182,7 +182,9 @@ dword_result_t XamContentCreateEnumerator(dword_t user_index, dword_t device_id,
 
   // Get all content data.
   auto content_datas = kernel_state()->content_manager()->ListContent(
-      device_id ? device_id : dummy_device_info_.device_id, content_type);
+      device_id ? static_cast<uint32_t>(device_id)
+                : dummy_device_info_.device_id,
+      content_type);
   for (auto& content_data : content_datas) {
     auto ptr = e->AppendItem();
     if (!ptr) {
diff --git a/src/xenia/kernel/xam/xam_ui.cc b/src/xenia/kernel/xam/xam_ui.cc
index 88be3e335..860f96d90 100644
--- a/src/xenia/kernel/xam/xam_ui.cc
+++ b/src/xenia/kernel/xam/xam_ui.cc
@@ -21,7 +21,7 @@ namespace xe {
 namespace kernel {
 namespace xam {
 
-std::atomic<int> xam_dialogs_shown_ = 0;
+std::atomic<int> xam_dialogs_shown_ = {0};
 
 SHIM_CALL XamIsUIActive_shim(PPCContext* ppc_context,
                              KernelState* kernel_state) {
@@ -54,7 +54,7 @@ class MessageBoxDialog : public xe::ui::ImGuiDialog {
     }
     if (ImGui::BeginPopupModal(title_.c_str(), nullptr,
                                ImGuiWindowFlags_AlwaysAutoResize)) {
-      ImGui::Text(description_.c_str());
+      ImGui::Text("%s", description_.c_str());
       if (first_draw) {
         ImGui::SetKeyboardFocusHere();
       }
@@ -185,7 +185,7 @@ class KeyboardInputDialog : public xe::ui::ImGuiDialog {
     }
     if (ImGui::BeginPopupModal(title_.c_str(), nullptr,
                                ImGuiWindowFlags_AlwaysAutoResize)) {
-      ImGui::TextWrapped(description_.c_str());
+      ImGui::TextWrapped("%s", description_.c_str());
       if (first_draw) {
         ImGui::SetKeyboardFocusHere();
       }
diff --git a/src/xenia/kernel/xboxkrnl/xboxkrnl_io.cc b/src/xenia/kernel/xboxkrnl/xboxkrnl_io.cc
index 342730be9..2ebc63258 100644
--- a/src/xenia/kernel/xboxkrnl/xboxkrnl_io.cc
+++ b/src/xenia/kernel/xboxkrnl/xboxkrnl_io.cc
@@ -196,9 +196,10 @@ dword_result_t NtReadFile(dword_t file_handle, dword_t event_handle,
     if (true || file->is_synchronous()) {
       // Synchronous.
       size_t bytes_read = 0;
-      result = file->Read(buffer, buffer_length,
-                          byte_offset_ptr ? *byte_offset_ptr : -1, &bytes_read,
-                          apc_context);
+      result = file->Read(
+          buffer, buffer_length,
+          byte_offset_ptr ? static_cast<uint32_t>(*byte_offset_ptr) : -1u,
+          &bytes_read, apc_context);
       if (io_status_block) {
         io_status_block->status = result;
         io_status_block->information = static_cast<uint32_t>(bytes_read);
@@ -210,8 +211,8 @@ dword_result_t NtReadFile(dword_t file_handle, dword_t event_handle,
       if ((uint32_t)apc_routine_ptr & ~1) {
         if (apc_context) {
           auto thread = XThread::GetCurrentThread();
-          thread->EnqueueApc((uint32_t)apc_routine_ptr & ~1, apc_context,
-                             io_status_block, 0);
+          thread->EnqueueApc(static_cast<uint32_t>(apc_routine_ptr) & ~1u,
+                             apc_context, io_status_block, 0);
         }
       }
 
@@ -286,9 +287,10 @@ dword_result_t NtWriteFile(dword_t file_handle, dword_t event_handle,
     if (true || file->is_synchronous()) {
       // Synchronous request.
       size_t bytes_written = 0;
-      result = file->Write(buffer, buffer_length,
-                           byte_offset_ptr ? *byte_offset_ptr : -1,
-                           &bytes_written, apc_context);
+      result = file->Write(
+          buffer, buffer_length,
+          byte_offset_ptr ? static_cast<uint32_t>(*byte_offset_ptr) : -1u,
+          &bytes_written, apc_context);
       if (XSUCCEEDED(result)) {
         info = (int32_t)bytes_written;
       }
@@ -356,7 +358,7 @@ dword_result_t NtRemoveIoCompletion(
     status = X_STATUS_INVALID_HANDLE;
   }
 
-  uint64_t timeout_ticks = timeout ? *timeout : 0;
+  uint64_t timeout_ticks = timeout ? static_cast<uint32_t>(*timeout) : 0u;
   if (port->WaitForNotification(timeout_ticks)) {
     auto notification = port->DequeueNotification();
     if (key_context) {
diff --git a/src/xenia/kernel/xboxkrnl/xboxkrnl_modules.cc b/src/xenia/kernel/xboxkrnl/xboxkrnl_modules.cc
index 1bfc7da25..80d78939f 100644
--- a/src/xenia/kernel/xboxkrnl/xboxkrnl_modules.cc
+++ b/src/xenia/kernel/xboxkrnl/xboxkrnl_modules.cc
@@ -323,7 +323,8 @@ SHIM_CALL XexGetProcedureAddress_shim(PPCContext* ppc_context,
 void AppendParam(StringBuffer* string_buffer,
                  pointer_t<X_EX_TITLE_TERMINATE_REGISTRATION> reg) {
   string_buffer->AppendFormat("%.8X(%.8X, %.8X)", reg.guest_address(),
-                              reg->notification_routine, reg->priority);
+                              static_cast<uint32_t>(reg->notification_routine),
+                              static_cast<uint32_t>(reg->priority));
 }
 
 void ExRegisterTitleTerminateNotification(
diff --git a/src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc b/src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
index fdecef51e..54cd15f76 100644
--- a/src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
+++ b/src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
@@ -832,7 +832,7 @@ dword_result_t KeWaitForSingleObject(lpvoid_t object_ptr, dword_t wait_reason,
     return X_STATUS_ABANDONED_WAIT_0;
   }
 
-  uint64_t timeout = timeout_ptr ? *timeout_ptr : 0;
+  uint64_t timeout = timeout_ptr ? static_cast<uint32_t>(*timeout_ptr) : 0u;
   X_STATUS result = object->Wait(wait_reason, processor_mode, alertable,
                                  timeout_ptr ? &timeout : nullptr);
 
@@ -850,7 +850,7 @@ dword_result_t NtWaitForSingleObjectEx(dword_t object_handle, dword_t wait_mode,
   auto object =
       kernel_state()->object_table()->LookupObject<XObject>(object_handle);
   if (object) {
-    uint64_t timeout = timeout_ptr ? *timeout_ptr : 0;
+    uint64_t timeout = timeout_ptr ? static_cast<uint32_t>(*timeout_ptr) : 0u;
     result =
         object->Wait(3, wait_mode, alertable, timeout_ptr ? &timeout : nullptr);
   } else {
@@ -885,7 +885,7 @@ dword_result_t KeWaitForMultipleObjects(dword_t count, lpdword_t objects_ptr,
     objects.push_back(std::move(object_ref));
   }
 
-  uint64_t timeout = timeout_ptr ? *timeout_ptr : 0;
+  uint64_t timeout = timeout_ptr ? static_cast<uint32_t>(*timeout_ptr) : 0u;
   result = XObject::WaitMultiple(uint32_t(objects.size()),
                                  reinterpret_cast<XObject**>(objects.data()),
                                  wait_type, wait_reason, processor_mode,
@@ -937,7 +937,7 @@ dword_result_t NtSignalAndWaitForSingleObjectEx(dword_t signal_handle,
   auto wait_object =
       kernel_state()->object_table()->LookupObject<XObject>(wait_handle);
   if (signal_object && wait_object) {
-    uint64_t timeout = timeout_ptr ? *timeout_ptr : 0;
+    uint64_t timeout = timeout_ptr ? static_cast<uint32_t>(*timeout_ptr) : 0u;
     result =
         XObject::SignalAndWait(signal_object.get(), wait_object.get(), 3, 1,
                                alertable, timeout_ptr ? &timeout : nullptr);
diff --git a/src/xenia/kernel/xenumerator.h b/src/xenia/kernel/xenumerator.h
index dafded9fe..fd19e9ed2 100644
--- a/src/xenia/kernel/xenumerator.h
+++ b/src/xenia/kernel/xenumerator.h
@@ -64,7 +64,7 @@ class XStaticEnumerator : public XEnumerator {
     std::memcpy(buffer, buffer_.data(), item_count_ * item_size_);
   }
 
-  bool WriteItem(uint8_t* buffer) {
+  bool WriteItem(uint8_t* buffer) override {
     if (current_item_ >= item_count_) {
       return false;
     }
diff --git a/src/xenia/kernel/xobject.cc b/src/xenia/kernel/xobject.cc
index bd27409d7..d5a925fe0 100644
--- a/src/xenia/kernel/xobject.cc
+++ b/src/xenia/kernel/xobject.cc
@@ -150,6 +150,8 @@ object_ref<XObject> XObject::Restore(KernelState* kernel_state, Type type,
       return XThread::Restore(kernel_state, stream);
     case kTypeTimer:
       break;
+    case kTypeUndefined:
+      break;
   }
 
   assert_always("No restore handler exists for this object!");
diff --git a/src/xenia/kernel/xthread.cc b/src/xenia/kernel/xthread.cc
index c14257cb9..e90703870 100644
--- a/src/xenia/kernel/xthread.cc
+++ b/src/xenia/kernel/xthread.cc
@@ -1145,12 +1145,12 @@ object_ref<XThread> XThread::Restore(KernelState* kernel_state,
   thread->kernel_state_ = kernel_state;
 
   if (!thread->RestoreObject(stream)) {
-    return false;
+    return nullptr;
   }
 
   if (stream->Read<uint32_t>() != 'THRD') {
     XELOGE("Could not restore XThread - invalid magic!");
-    return false;
+    return nullptr;
   }
 
   XELOGD("XThread %.8X", thread->handle());