[Base] Limit AVX startup checks to AMD64

src/xenia/base/main_init_posix.cc

@@ -6,6 +6,10 @@
 * Released under the BSD license - see LICENSE in the root for more details. *
 ******************************************************************************
 */
+
+#include "xenia/base/platform.h"
+
+#if XE_ARCH_AMD64
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 #include <xbyak/xbyak/xbyak_util.h>
@@ -44,3 +48,4 @@ class StartupCpuFeatureCheck {
 // https://reviews.llvm.org/D12689#243295
 __attribute__((
     init_priority(101))) static StartupCpuFeatureCheck gStartupAvxCheck;
+#endif  // XE_ARCH_AMD64

src/xenia/base/main_init_win.cc

@@ -11,6 +11,7 @@
 
 #include <cstdlib>
 
+#if XE_ARCH_AMD64
 // Includes Windows headers, so it goes after platform_win.h.
 #include "third_party/xbyak/xbyak/xbyak_util.h"
 
@@ -44,3 +45,4 @@ class StartupCpuFeatureCheck {
 #pragma warning(suppress : 4073)
 #pragma init_seg(lib)
 static StartupCpuFeatureCheck gStartupAvxCheck;
+#endif  // XE_ARCH_AMD64