Latest AAR does not support 16KB page size

[MiCkSoftware]

Describe the bug
Google Play Console rejects the app because the native GenAI libraries packaged in onnxruntime-genai-android are not aligned for
16 KB page size. The warning lists libonnxruntime-genai.so and libonnxruntime-genai-jni.so (arm64-v8a, x86_64) as non‑aligned.

To Reproduce

1. Build an Android app that includes onnxruntime-genai-android AAR (e.g., 0.11.4).
2. Upload the APK/AAB to Google Play Console.
3. Play Console reports: “APK … is not compatible with 16 KB devices. Some libraries have LOAD segments not aligned at 16 KB
   boundaries …” for the GenAI libs.

Expected behavior
The GenAI AAR should ship with 16 KB page‑size compatible native libs so apps targeting API 35+ pass Play Console checks.

Screenshots
Play Console warning text:
“APK app‑debug.apk is not compatible with 16 KB devices. Some libraries have LOAD segments not aligned at 16 KB boundaries:
lib/arm64‑v8a/libonnxruntime‑genai‑jni.so
lib/arm64‑v8a/libonnxruntime‑genai.so
lib/x86_64/libonnxruntime‑genai‑jni.so
lib/x86_64/libonnxruntime‑genai.so
Starting November 1st, 2025, all new apps and updates to existing apps submitted to Google Play and targeting Android 15+
devices must support 16 KB page sizes.”

Desktop (please complete the following information):

• OS: Android (built on macOS)
• Browser: NA
• Version: latest

Smartphone (please complete the following information):

• Device: Pixel 4a / Pixel 9 Pro / Generic emulator
• OS: Android 14/15
• Browser: NA
• Version: latest

Additional context

• Project includes com.microsoft.onnxruntime:onnxruntime-android and onnxruntime-genai-android AAR.
• The issue is with GenAI native libs only.
• Request: publish updated GenAI Android AAR with 16 KB aligned LOAD segments (p_align=0x4000) for Android 15+ compliance.

[MiCkSoftware]

BTW, I could test a fix . What I did / diff summary (16KB page-size fix for Android 15+)
I rebuilt onnxruntime-genai-android from source (tag v0.11.4) and forced the ELF LOAD segment alignment to 16KB by adding GNU ld linker flags when building Android shared libraries:

• -Wl,-z,max-page-size=16384
• -Wl,-z,common-page-size=16384
  Concrete changes:
• CMakeLists.txt (root): add target_link_options(onnxruntime-genai ...) guarded by if(ANDROID)
• src/java/CMakeLists.txt: add target_link_options(onnxruntime-genai-jni ...) guarded by if(ANDROID)

if(ANDROID)
  target_link_options(onnxruntime-genai PRIVATE
    "-Wl,-z,max-page-size=16384"
    "-Wl,-z,common-page-size=16384"
  )
endif()

Verification:

• Unzipped the produced AAR/APK and ran llvm-readelf -l on both .so files for arm64-v8a and x86_64.
• All LOAD program headers now show Align 0x4000 (16KB), e.g.:
  • LOAD ... R E ... Align 0x4000
  • LOAD ... RW ... Align 0x4000

[kunal-vaishnavi]

There are some open PRs to try and fix this.

• Add Android 16KB page size support for Google Play compliance #1810
• Add linker flags for 16 KB page size on Android #1860

Please feel free to open a PR and contribute.