diff --git a/src/xenia/base/memory.cc b/src/xenia/base/memory.cc
index 8d9cb3dc6..b9494f151 100644
--- a/src/xenia/base/memory.cc
+++ b/src/xenia/base/memory.cc
@@ -34,7 +34,7 @@ using xe::swcache::CacheLine;
 
 static constexpr unsigned NUM_CACHELINES_IN_PAGE = 4096 / sizeof(CacheLine);
 
-#if defined(__clang__)
+#if defined(__clang__) || defined(__GNUC__)
 XE_FORCEINLINE
 static void mvdir64b(void* to, const void* from) {
   __asm__("movdir64b %1, %0" : : "r"(to), "m"(*(char*)from) : "memory");
diff --git a/src/xenia/base/memory.h b/src/xenia/base/memory.h
index 8ef40bbff..f14111352 100644
--- a/src/xenia/base/memory.h
+++ b/src/xenia/base/memory.h
@@ -724,10 +724,15 @@ static void ReadLineNT(CacheLine* XE_RESTRICT destination,
                        const CacheLine* XE_RESTRICT source) {
   assert_true((reinterpret_cast<uintptr_t>(source) & 63ULL) == 0);
 
-  __m128i first = _mm_stream_load_si128(&source->xmms[0]);
-  __m128i second = _mm_stream_load_si128(&source->xmms[1]);
-  __m128i third = _mm_stream_load_si128(&source->xmms[2]);
-  __m128i fourth = _mm_stream_load_si128(&source->xmms[3]);
+  // GCC's intrinsic takes non-const pointer; stream load does not modify source.
+  __m128i first =
+      _mm_stream_load_si128(const_cast<__m128i*>(&source->xmms[0]));
+  __m128i second =
+      _mm_stream_load_si128(const_cast<__m128i*>(&source->xmms[1]));
+  __m128i third =
+      _mm_stream_load_si128(const_cast<__m128i*>(&source->xmms[2]));
+  __m128i fourth =
+      _mm_stream_load_si128(const_cast<__m128i*>(&source->xmms[3]));
 
   destination->xmms[0] = first;
   destination->xmms[1] = second;
diff --git a/src/xenia/gpu/command_processor.h b/src/xenia/gpu/command_processor.h
index f2bf000d4..9a25e27d7 100644
--- a/src/xenia/gpu/command_processor.h
+++ b/src/xenia/gpu/command_processor.h
@@ -201,7 +201,13 @@ class CommandProcessor {
   virtual void WriteRegistersFromMem(uint32_t start_index, uint32_t* base,
                                      uint32_t num_registers);
 
+  // GCC fails with "inlining failed: function body not available" when the
+  // virtual definition is in a .cc and callers (e.g. pm4 template) are in
+  // headers. Omit XE_FORCEINLINE for GCC only so the call uses the out-of-line
+  // definition; Clang and others keep the hint.
+#if !defined(__GNUC__) || defined(__clang__)
   XE_FORCEINLINE
+#endif
   virtual void WriteRegisterRangeFromRing(xe::RingBuffer* ring, uint32_t base,
                                           uint32_t num_registers);
 
diff --git a/src/xenia/kernel/kernel_state.h b/src/xenia/kernel/kernel_state.h
index 8095c3fa7..170d617cb 100644
--- a/src/xenia/kernel/kernel_state.h
+++ b/src/xenia/kernel/kernel_state.h
@@ -147,23 +147,24 @@ struct DPCImpersonationScope {
   uint8_t previous_irql_;
 };
 
+struct KernelVersionParts {
+  xe::be<uint16_t> major;
+  xe::be<uint16_t> minor;
+  xe::be<uint16_t> build;
+  xe::be<uint16_t> qfe;
+};
+
 struct KernelVersion {
   union {
     xe::be<uint64_t> value;
-
-    struct {
-      xe::be<uint16_t> major;
-      xe::be<uint16_t> minor;
-      xe::be<uint16_t> build;
-      xe::be<uint16_t> qfe;
-    };
+    KernelVersionParts parts;
   };
 
   KernelVersion(uint16_t build_ver = kBaseKernelBuildVersion) {
-    major = 2;
-    minor = 0;
-    build = std::max(kBaseKernelBuildVersion, build_ver);
-    qfe = 0;
+    parts.major = 2;
+    parts.minor = 0;
+    parts.build = std::max(kBaseKernelBuildVersion, build_ver);
+    parts.qfe = 0;
   }
 };
 
diff --git a/src/xenia/kernel/xbdm/xbdm_misc.cc b/src/xenia/kernel/xbdm/xbdm_misc.cc
index 264b3d50c..abc678c6b 100644
--- a/src/xenia/kernel/xbdm/xbdm_misc.cc
+++ b/src/xenia/kernel/xbdm/xbdm_misc.cc
@@ -205,7 +205,7 @@ dword_result_t DmGetSystemInfo_entry(pointer_t<XBDM_SYSTEM_INFO> info) {
   info->base_kernel_version.qfe = info->kernel_version.qfe = 0;
 
   info->base_kernel_version.build = kBaseKernelBuildVersion;
-  info->kernel_version.build = kernel_state()->GetKernelVersion()->build;
+  info->kernel_version.build = kernel_state()->GetKernelVersion()->parts.build;
 
   return XBDM_SUCCESSFUL;
 }