tensorflow/lite/micro/tools/make/flatbuffers.patch

diff --git a/include/flatbuffers/base.h b/include/flatbuffers/base.h
index a5ac10d..371b6fd 100644
--- a/include/flatbuffers/base.h
+++ b/include/flatbuffers/base.h
@@ -1,6 +1,16 @@
 #ifndef FLATBUFFERS_BASE_H_
 #define FLATBUFFERS_BASE_H_
 
+// For TFLM, we always want FLATBUFFERS_LOCALE_INDEPENDENT to be defined as 0.
+// We could achieve this by adding -DFLATBUFFERS_LOCALE_INDEPENDENT=0 to the
+// TFLM Makefile. However, for (at least) the Arduino, adding additional build
+// flags during the compilation can be a bit awkward. As such, we have instead
+// made a decision to change the default to be FLATBUFFERS_LOCALE_INDEPENDENT=0
+// for TFLM to make it easier for external IDE integration.
+#ifndef FLATBUFFERS_LOCALE_INDEPENDENT
+#define FLATBUFFERS_LOCALE_INDEPENDENT 0
+#endif
+
 // clang-format off
 
 // If activate should be declared and included first.
diff --git a/include/flatbuffers/default_allocator.h b/include/flatbuffers/default_allocator.h
index 8b173af..975d938 100644
--- a/include/flatbuffers/default_allocator.h
+++ b/include/flatbuffers/default_allocator.h
@@ -39,26 +39,20 @@ class DefaultAllocator : public Allocator {
 // This is to avoid having a statically or dynamically allocated default
 // allocator, or having to move it between the classes that may own it.
 inline uint8_t *Allocate(Allocator *allocator, size_t size) {
-  return allocator ? allocator->allocate(size)
-                   : DefaultAllocator().allocate(size);
+  return allocator->allocate(size);
 }
 
 inline void Deallocate(Allocator *allocator, uint8_t *p, size_t size) {
-  if (allocator)
-    allocator->deallocate(p, size);
-  else
-    DefaultAllocator().deallocate(p, size);
+  allocator->deallocate(p, size);
 }
 
 inline uint8_t *ReallocateDownward(Allocator *allocator, uint8_t *old_p,
                                    size_t old_size, size_t new_size,
                                    size_t in_use_back, size_t in_use_front) {
-  return allocator ? allocator->reallocate_downward(old_p, old_size, new_size,
-                                                    in_use_back, in_use_front)
-                   : DefaultAllocator().reallocate_downward(
-                         old_p, old_size, new_size, in_use_back, in_use_front);
+  return allocator->reallocate_downward(old_p, old_size, new_size, in_use_back,
+                                        in_use_front);
 }
 
 }  // namespace flatbuffers
 
-#endif  // FLATBUFFERS_DEFAULT_ALLOCATOR_H_
\ No newline at end of file
+#endif  // FLATBUFFERS_DEFAULT_ALLOCATOR_H_
diff --git a/include/flatbuffers/flexbuffers.h b/include/flatbuffers/flexbuffers.h
index 89f3f30..6e6d0b3 100644
--- a/include/flatbuffers/flexbuffers.h
+++ b/include/flatbuffers/flexbuffers.h
@@ -496,9 +496,24 @@ class Reference {
           return static_cast<double>(ReadUInt64(Indirect(), byte_width_));
         case FBT_NULL: return 0.0;
         case FBT_STRING: {
+#if 1
+#if !defined( _MSC_VER)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnull-dereference"
+#endif
+          // See b/173239141 for additional context. Patched via
+          // micro/tools/make/flexbuffers_download.sh
+          // Introduce a segfault for an unsupported code path for TFLM.
+          return *(static_cast<double*>(nullptr));
+#if !defined( _MSC_VER)
+#pragma GCC diagnostic pop
+#endif
+#else
+          // This is the original code
           double d;
           flatbuffers::StringToNumber(AsString().c_str(), &d);
           return d;
+#endif
         }
         case FBT_VECTOR: return static_cast<double>(AsVector().size());
         case FBT_BOOL:
diff --git a/include/flatbuffers/util.h b/include/flatbuffers/util.h
index 93a39de..1cd4e8f 100644
--- a/include/flatbuffers/util.h
+++ b/include/flatbuffers/util.h
@@ -24,6 +24,12 @@
 #include "flatbuffers/base.h"
 #include "flatbuffers/stl_emulation.h"
 
+// For TFLM we always want to use FLATBUFFERS_PREFER_PRINTF=1. See
+// http://b/211811553 for more context.
+#ifndef FLATBUFFERS_PREFER_PRINTF
+#define FLATBUFFERS_PREFER_PRINTF 1
+#endif
+
 #ifndef FLATBUFFERS_PREFER_PRINTF
 #  include <iomanip>
 #  include <sstream>