--- ./engine/src/build/config/BUILDCONFIG.gn.orig
+++ ./engine/src/build/config/BUILDCONFIG.gn
@@ -324,7 +324,7 @@
   is_clang = true
 }
 
-use_flutter_cxx = is_clang && (is_linux || is_android || is_mac || is_ios)
+use_flutter_cxx = false
 
 if (is_msan && !is_linux) {
   assert(false, "Memory sanitizer is only available on Linux.")
--- ./engine/src/flutter/third_party/flatbuffers/include/flatbuffers/util.h.orig
+++ ./engine/src/flutter/third_party/flatbuffers/include/flatbuffers/util.h
@@ -202,7 +202,7 @@
 
 // clang-format off
 // Use locale independent functions {strtod_l, strtof_l, strtoll_l, strtoull_l}.
-#if defined(FLATBUFFERS_LOCALE_INDEPENDENT) && (FLATBUFFERS_LOCALE_INDEPENDENT > 0)
+#if defined(__GLIBC__) && defined(FLATBUFFERS_LOCALE_INDEPENDENT) && (FLATBUFFERS_LOCALE_INDEPENDENT > 0)
   class ClassicLocale {
     #ifdef _MSC_VER
       typedef _locale_t locale_type;
--- ./engine/src/flutter/third_party/flatbuffers/src/util.cpp.orig
+++ ./engine/src/flutter/third_party/flatbuffers/src/util.cpp
@@ -252,7 +252,7 @@
 }
 
 // Locale-independent code.
-#if defined(FLATBUFFERS_LOCALE_INDEPENDENT) && \
+#if defined(__GLIBC__) && defined(FLATBUFFERS_LOCALE_INDEPENDENT) && \
     (FLATBUFFERS_LOCALE_INDEPENDENT > 0)
 
 // clang-format off