Apply patches for 16KB page size for swiftlang/swift#81596

Author: marcprux

swift-ci/sdks/android/patches/apply-patches.sh

@@ -3,6 +3,10 @@
 patches_dir=$(dirname $(realpath -- "${BASH_SOURCE[0]}"))
 cd ${1}
 
+# https://github.com/swiftlang/swift/pull/81596
+git apply -v -C1 ${patches_dir}/page-size-16KB-81398-AddSwiftStdlib.patch
+git apply -v -C1 ${patches_dir}/page-size-16KB-81398-targets.patch
+
 case "${BUILD_SCHEME}" in
     swift-*-branch)
         git apply -v -C1 ${patches_dir}/swift-android.patch
@@ -20,3 +24,4 @@ esac
 
 # disable backtrace() for Android (needs either API33+ or libandroid-execinfo, or to manually add in backtrace backport)
 perl -pi -e 's;os\(Android\);os\(AndroidDISABLED\);g' swift-testing/Sources/Testing/SourceAttribution/Backtrace.swift
+

swift-ci/sdks/android/patches/page-size-16KB-81398-AddSwiftStdlib.patch

@@ -0,0 +1,23 @@
+From 8db43c6290ee04145264c04728a030dd74f87452 Mon Sep 17 00:00:00 2001
+From: Marc Prud'hommeaux <[email protected]>
+Date: Sun, 18 May 2025 19:10:36 -0400
+Subject: [PATCH] Support 16 KB page sizes on Android
+
+Android 15+ requires that native libraries be compiled with a linker flag to support 16 KB page sizes. See: https://developer.android.com/guide/practices/page-sizes#compile-r26-lower
+---
+ stdlib/cmake/modules/AddSwiftStdlib.cmake | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/swift/stdlib/cmake/modules/AddSwiftStdlib.cmake b/swift/stdlib/cmake/modules/AddSwiftStdlib.cmake
+index ce113989ad75d..089f5f30acbb5 100644
+--- a/swift/stdlib/cmake/modules/AddSwiftStdlib.cmake
++++ b/swift/stdlib/cmake/modules/AddSwiftStdlib.cmake
+@@ -2469,6 +2469,8 @@ function(add_swift_target_library name)
+         list(APPEND swiftlib_link_flags_all "-shared")
+         # TODO: Instead of `lib${name}.so` find variable or target property which already have this value.
+         list(APPEND swiftlib_link_flags_all "-Wl,-soname,lib${name}.so")
++        # Ensure compatibility with Android 15+ devices using 16KB memory pages.
++        list(APPEND swiftlib_link_flags_all "-Wl,-z,max-page-size=16384")
+       endif()
+ 
+       if (SWIFTLIB_BACK_DEPLOYMENT_LIBRARY)

swift-ci/sdks/android/patches/page-size-16KB-81398-targets.patch

@@ -0,0 +1,13 @@
+diff --git a/swift/utils/swift_build_support/swift_build_support/targets.py b/swift/utils/swift_build_support/swift_build_support/targets.py
+index fba09416ddb..3fbc51955f4 100644
+--- a/swift/utils/swift_build_support/swift_build_support/targets.py
++++ b/swift/utils/swift_build_support/swift_build_support/targets.py
+@@ -165,6 +165,7 @@ class AndroidPlatform(Platform):
+ 
+         flags += '-sdk %s/sysroot ' % (android_toolchain_path)
+         flags += '-tools-directory %s/bin' % (android_toolchain_path)
++        flags += '--Xclang-linker -Wl,-z,max-page-size=16384'
+         return flags
+ 
+     def cmake_options(self, args):
+