Use NDK r28c

.ci/docker/build.sh

@@ -54,13 +54,13 @@ case "${IMAGE_NAME}" in
   executorch-ubuntu-22.04-mediatek-sdk)
     MEDIATEK_SDK=yes
     CLANG_VERSION=12
-    ANDROID_NDK_VERSION=r27b
+    ANDROID_NDK_VERSION=r28c
     ;;
   executorch-ubuntu-22.04-clang12-android)
     LINTRUNNER=""
     CLANG_VERSION=12
     # From https://developer.android.com/ndk/downloads
-    ANDROID_NDK_VERSION=r27b
+    ANDROID_NDK_VERSION=r28c
     ;;
   *)
     echo "Invalid image name ${IMAGE_NAME}"

.ci/scripts/setup-samsung-linux-deps.sh

@@ -52,7 +52,7 @@ download_ai_lite_core() {
 install_enn_backend() {
   NDK_INSTALLATION_DIR=/opt/ndk
   rm -rf "${NDK_INSTALLATION_DIR}" && sudo mkdir -p "${NDK_INSTALLATION_DIR}"
-  ANDROID_NDK_VERSION=r27b
+  ANDROID_NDK_VERSION=r28c
 
   # build Exynos backend
   export ANDROID_NDK_ROOT=${ANDROID_NDK_ROOT:-/opt/ndk}

.github/workflows/_android.yml

@@ -54,7 +54,7 @@ jobs:
     # NB: Use metal install for KVM support to run the emulator faster
     runs-on: linux.24xl.spr-metal
     env:
-      ANDROID_NDK_VERSION: r27b
+      ANDROID_NDK_VERSION: r28c
       API_LEVEL: 34
     steps:
       - name: Setup SSH (Click me for login details)

backends/vulkan/README.md

@@ -150,7 +150,7 @@ when building with CMake.
 
 First, make sure that you have the Android NDK installed; any NDK version past
 NDK r19c should work. Note that the examples in this doc have been validated with
-NDK r27b. The Android SDK should also be installed so that you have access to `adb`.
+NDK r28c. The Android SDK should also be installed so that you have access to `adb`.
 
 The instructions in this page assumes that the following environment variables
 are set.

docs/source/backends-vulkan.md

@@ -150,7 +150,7 @@ when building with CMake.
 
 First, make sure that you have the Android NDK installed; any NDK version past
 NDK r19c should work. Note that the examples in this doc have been validated with
-NDK r27b. The Android SDK should also be installed so that you have access to `adb`.
+NDK r28c. The Android SDK should also be installed so that you have access to `adb`.
 
 The instructions in this page assumes that the following environment variables
 are set.

docs/source/using-executorch-android.md

@@ -112,7 +112,7 @@ Now you can compile your app with the ExecuTorch Android library.
 
 You need Android [SDK](https://developer.android.com/studio) and [NDK](https://developer.android.com/ndk/downloads) to use it.
 
-Current NDK version used in ExecuTorch CI: r27b.
+Current NDK version used in ExecuTorch CI: r28c.
 
 You need to set `ANDROID_HOME` to Android SDK home and `ANDROID_NDK` to the correct NDK root (containing NOTICE file).
 

examples/models/llama/README.md

@@ -264,7 +264,7 @@ If you an error about "RE2 failed to compile pattern with lookahead:...SUPPORT_R
 
 **1. Build llama runner binary for Android**
 
-*Pre-requisite*: Android NDK (tested with r27b) which can be downloaded from [here](https://developer.android.com/ndk/downloads). Note that the mac binary can be unpackaged and you can locate NDK folder from it.
+*Pre-requisite*: Android NDK (tested with r28c) which can be downloaded from [here](https://developer.android.com/ndk/downloads). Note that the mac binary can be unpackaged and you can locate NDK folder from it.
 
 **1.1 Set Android NDK**
 ```

scripts/build_android_library.sh

@@ -36,7 +36,6 @@ build_android_native_library() {
 
   cmake . -DCMAKE_INSTALL_PREFIX="${CMAKE_OUT}" \
     -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK}/build/cmake/android.toolchain.cmake" \
-    -DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
     --preset "android-${ANDROID_ABI}" \
     -DANDROID_PLATFORM=android-26 \
     -DEXECUTORCH_ENABLE_EVENT_TRACER="${EXECUTORCH_ANDROID_PROFILING:-OFF}" \