diff --git a/arduino/beken-72xx/cores/arduino/main.cpp b/arduino/beken-72xx/cores/arduino/main.cpp
index f4b2be3..c813e04 100644
--- a/arduino/beken-72xx/cores/arduino/main.cpp
+++ b/arduino/beken-72xx/cores/arduino/main.cpp
@@ -9,6 +9,8 @@ extern "C" {
 
 extern int uart_print_port;
 
+void __sync_synchronize(void) {}
+
 } // extern "C"
 
 beken_thread_t mainThread;
diff --git a/builder/frameworks/beken-72xx-sdk.py b/builder/frameworks/beken-72xx-sdk.py
index 8d987aa..4750bf6 100644
--- a/builder/frameworks/beken-72xx-sdk.py
+++ b/builder/frameworks/beken-72xx-sdk.py
@@ -43,13 +43,13 @@ env.Append(
         "-mthumb",
         "-mthumb-interwork",
         "-g",
-        "-O2",
+        "-Os",
         "-fdata-sections",
         "-ffunction-sections",
+        "-fno-inline-functions",
         "-fno-strict-aliasing",
         "-fsigned-char",
         "-Wno-comment",
-        "-Werror=implicit-function-declaration",
     ],
     CFLAGS=[
         "-std=gnu99",
@@ -57,6 +57,7 @@ env.Append(
         "-Wall",
         "-Wno-format",
         "-Wno-unknown-pragmas",
+        "-Werror=implicit-function-declaration",
     ],
     CXXFLAGS=[
         "-std=gnu++11",
@@ -64,6 +65,8 @@ env.Append(
         "-fno-exceptions",
         "-fno-rtti",
         "-Wno-literal-suffix",
+        "-Wno-psabi",
+        "-Wno-return-type",
     ],
     CPPDEFINES=[
         # LibreTuya configuration
@@ -364,6 +367,8 @@ env.AddLibrary(
         CCFLAGS=[
             "-Wno-unused-variable",
             "-Wno-implicit-function-declaration",
+            "-Wno-incompatible-pointer-types",
+            "-Wno-int-conversion",
         ],
         CFLAGS=["-<-Wall>"],
     ),
diff --git a/builder/frameworks/realtek-ambz-sdk.py b/builder/frameworks/realtek-ambz-sdk.py
index 6c81a32..6ebf64a 100644
--- a/builder/frameworks/realtek-ambz-sdk.py
+++ b/builder/frameworks/realtek-ambz-sdk.py
@@ -16,9 +16,10 @@ env.Append(
         "-mfpu=fpv4-sp-d16",
         "-g2",
         "-w",
-        "-O2",
+        "-Os",
         "-fdata-sections",
         "-ffunction-sections",
+        "-fno-inline-functions",
         "-fmessage-length=0",
         "-fno-common",
         "-fno-short-enums",
diff --git a/platform.json b/platform.json
index f95acd5..3414b61 100644
--- a/platform.json
+++ b/platform.json
@@ -44,9 +44,7 @@
       "optional": true,
       "version": "https://github.com/libretuya/framework-realtek-amb1#v2022.06.21",
       "toolchains": {
-        "any": "gccarmnoneeabi@~1.50201.0",
-        "arm": "gccarmnoneeabi@~1.100301.0",
-        "linux_x86_64": "gccarmnoneeabi@~1.100301.0"
+        "any": "gccarmnoneeabi@~1.100301.0"
       },
       "libraries": {
         "lwip": [
@@ -67,8 +65,7 @@
       "optional": true,
       "version": "https://github.com/libretuya/framework-beken-bdk#v2021.06.07",
       "toolchains": {
-        "any":"gccarmnoneeabi@~1.40804.0",
-        "arm": "gccarmnoneeabi@~1.40803.0"
+        "any":"gccarmnoneeabi@~1.100301.0"
       },
       "libraries": {
         "lwip": [