diff --git a/arm/raspi/third_party/ffmpeg/libavutil/avconfig.h b/arm/raspi/third_party/ffmpeg/libavutil/avconfig.h
new file mode 100644
index 00000000..51cfed14
--- /dev/null
+++ b/arm/raspi/third_party/ffmpeg/libavutil/avconfig.h
@@ -0,0 +1,7 @@
+/* Generated by ffconf */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+#define AV_HAVE_BIGENDIAN 0
+#define AV_HAVE_FAST_UNALIGNED 0
+#endif
+/* AVUTIL_AVCONFIG_H */ 
diff --git a/other/AVX2/build/config/compiler/BUILD.gn b/other/AVX2/build/config/compiler/BUILD.gn
index ad2dcfe9..f080d83c 100644
--- a/other/AVX2/build/config/compiler/BUILD.gn
+++ b/other/AVX2/build/config/compiler/BUILD.gn
@@ -69,6 +69,9 @@ declare_args() {
   # When we are going to use gold we need to find it.
   # This is initialized below, after use_gold might have been overridden.
   gold_path = ""
+  
+  # Whether to enable LLVM's Polly optimizations. See https://polly.llvm.org/
+  use_polly = false
 
   # Enable fatal linker warnings. Building Chromium with certain versions
   # of binutils can cause linker warning.
@@ -2068,6 +2071,15 @@ if (is_win) {
     "-mllvm:-enable-gvn-hoist",
   ]
   
+  if (use_polly == true) {
+    common_optimize_on_ldflags += [
+    "-mllvm:-polly",
+    "-mllvm:-polly-detect-profitability-min-per-loop-insts=40",
+    "-mllvm:-polly-invariant-load-hoisting",
+    "-mllvm:-polly-vectorizer=stripmine",
+    ]
+  }
+  
   # /OPT:ICF is not desirable in Debug builds, since code-folding can result in
   # misleading symbols in stack traces.
   if (!is_debug && !is_component_build) {
@@ -2127,6 +2139,15 @@ if (is_win) {
     "-Wl,-mllvm,-enable-gvn-hoist",
     "-Wl,-O3",
   ]
+  
+  if (use_polly == true) {
+    common_optimize_on_ldflags += [
+    "-Wl,-mllvm,-polly",
+    "-Wl,-mllvm,-polly-detect-profitability-min-per-loop-insts=40",
+    "-Wl,-mllvm,-polly-invariant-load-hoisting",
+    "-Wl,-mllvm,-polly-vectorizer=stripmine",
+    ]
+  }
 
   if (is_android) {
     # TODO(jdduke) Re-enable on mips after resolving linking
diff --git a/src/third_party/ffmpeg/libavutil/avconfig.h b/src/third_party/ffmpeg/libavutil/avconfig.h
new file mode 100644
index 00000000..51cfed14
--- /dev/null
+++ b/src/third_party/ffmpeg/libavutil/avconfig.h
@@ -0,0 +1,7 @@
+/* Generated by ffconf */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+#define AV_HAVE_BIGENDIAN 0
+#define AV_HAVE_FAST_UNALIGNED 0
+#endif
+/* AVUTIL_AVCONFIG_H */