Update doc to 6.2 release and associated info on compiler regressions

Author: finagolfin

README.md

@@ -9,8 +9,8 @@ emulator](https://github.com/finagolfin/swift-android-sdk/blob/main/.github/work
 
 ## Cross-compiling and testing Swift packages with the Android SDK bundle
 
-To build with the Swift 6.1.3 SDK bundle, first download [the official open-source
-Swift 6.1.3 toolchain for linux or macOS](https://swift.org/install)
+To build with the Swift 6.2 SDK bundle, first download [the official open-source
+Swift 6.2 toolchain for linux or macOS](https://swift.org/install)
 (make sure to install the Swift dependencies linked there). Install the OSS
 toolchain on macOS as detailed in [the instructions for using the static linux
 Musl SDK bundle at swift.org](https://www.swift.org/documentation/articles/static-linux-getting-started.html).
@@ -19,15 +19,15 @@ On linux, simply download the toolchain, unpack it, and add it to your `PATH`.
 Next, install the Android SDK bundle by having the Swift toolchain directly
 download it:
 ```
-swift sdk install https://github.com/finagolfin/swift-android-sdk/releases/download/6.1.3/swift-6.1.3-RELEASE-android-24-0.1.artifactbundle.tar.gz --checksum 440d09d539bda5b94807598b00696ac5d3893cb515b24715ac8868d62130b6d5
+swift sdk install https://github.com/finagolfin/swift-android-sdk/releases/download/6.2/swift-6.2-RELEASE-android-24-0.1.artifactbundle.tar.gz --checksum c26ebfd4e32c0ca1beabcc45729b62042da57ee76d7d043f63f2235da90dc491
 ```
 or alternately, download the SDK bundle with your favorite downloader and install
 it separately:
 ```
-> wget https://github.com/finagolfin/swift-android-sdk/releases/download/6.1.3/swift-6.1.3-RELEASE-android-24-0.1.artifactbundle.tar.gz
-> sha256sum swift-6.1.3-RELEASE-android-24-0.1.artifactbundle.tar.gz
-440d09d539bda5b94807598b00696ac5d3893cb515b24715ac8868d62130b6d5 swift-6.1.3-RELEASE-android-24-0.1.artifactbundle.tar.gz
-> swift sdk install swift-6.1.3-RELEASE-android-24-0.1.artifactbundle.tar.gz
+> wget https://github.com/finagolfin/swift-android-sdk/releases/download/6.2/swift-6.2-RELEASE-android-24-0.1.artifactbundle.tar.gz
+> sha256sum swift-6.2-RELEASE-android-24-0.1.artifactbundle.tar.gz
+c26ebfd4e32c0ca1beabcc45729b62042da57ee76d7d043f63f2235da90dc491 swift-6.2-RELEASE-android-24-0.1.artifactbundle.tar.gz
+> swift sdk install swift-6.2-RELEASE-android-24-0.1.artifactbundle.tar.gz
 ```
 You can check if it was properly installed by running `swift sdk list`.
 
@@ -56,20 +56,20 @@ one depends on the example executables `color`, `generate-manual`, `math`,
 point at test data in the repo: I've had success moving this data with the test
 runner, after modifying the test source so it has the path to this test data in
 the Android test environment. See the example of [swift-crypto on the
-CI](https://github.com/finagolfin/swift-android-sdk/blob/6.1.3/.github/workflows/sdks.yml#L532).
+CI](https://github.com/finagolfin/swift-android-sdk/blob/6.2/.github/workflows/sdks.yml#L522).
 
 You can copy these executables and the Swift runtime libraries to [an emulator
-or a USB debugging-enabled device with adb](https://github.com/swiftlang/swift/blob/release/6.1/docs/Android.md#3-deploying-the-build-products-to-the-device),
+or a USB debugging-enabled device with adb](https://github.com/swiftlang/swift/blob/release/6.2/docs/Android.md#3-deploying-the-build-products-to-the-device),
 or put them on an Android device with [a terminal emulator app like Termux](https://termux.dev/en/).
 I test aarch64 with Termux so I'll show how to run the test runner there, but
-the process is similar with adb, [as can be seen on the CI](https://github.com/finagolfin/swift-android-sdk/blob/6.1.3/.github/workflows/sdks.yml#L480).
+the process is similar with adb, [as can be seen on the CI](https://github.com/finagolfin/swift-android-sdk/blob/6.2/.github/workflows/sdks.yml#L470).
 
-Copy the test executables to the same directory as the Swift 6.1.3 runtime libraries:
+Copy the test executables to the same directory as the Swift 6.2 runtime libraries:
 ```
 cp .build/aarch64-unknown-linux-android24/debug/{swift-argument-parserPackageTests.xctest,color,generate-manual,math,repeat,roll} ..
-cp ~/.swiftpm/swift-sdks/swift-6.1.3-RELEASE-android-24-0.1.artifactbundle/swift-6.1.3-release-android-24-sdk/android-27d-sysroot/usr/lib/aarch64-linux-android/lib*.so ..
+cp ~/.swiftpm/swift-sdks/swift-6.2-RELEASE-android-24-0.1.artifactbundle/swift-6.2-release-android-24-sdk/android-27d-sysroot/usr/lib/aarch64-linux-android/lib*.so ..
 ```
-You can copy the test executables and Swift 6.1.3 runtime libraries to Termux using
+You can copy the test executables and Swift 6.2 runtime libraries to Termux using
 scp from OpenSSH, run these commands in Termux on the Android device:
 ```
 uname -m # check if you're running on the right architecture, should say `aarch64`
@@ -92,16 +92,12 @@ Revert that with `export LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermu
 when you're done running armv7 tests and want to go back to the normal aarch64
 mode.
 
-Two issues were recently introduced into the Swift toolchain that you may need
-to work around:
-
-1. If you have the `ANDROID_NDK_ROOT` environment variable set, as it is on
-github Actions runners, this SDK bundle won't work, so unset it.
-
-2. There is a bug when trying to [cross-compile `Testing` tests with the open-source
-macOS toolchain alone](https://github.com/swiftlang/swift-package-manager/issues/8362)-
-it works fine with the linux toolchain- use the `-plugin-path` workaround listed
-there until it is fixed on macOS.
+An issue was recently introduced into the Swift toolchain that you may need
+to work around: if you have the `ANDROID_NDK_ROOT` environment variable set, as
+it is on github Actions runners, this SDK bundle won't work, so unset it. There
+is [a proposed fix for this regression upstream](https://github.com/swiftlang/swift-driver/pull/1879),
+but you will have to unset this variable on the CI where it is normally set
+until that's in.
 
 ## Porting Swift packages to Android
 
@@ -137,11 +133,11 @@ packagingOptions {
 
 ## Building an Android SDK from source
 
-Download the Swift 6.1.3 compiler as above and Android NDK 27d (only building
+Download the Swift 6.2 compiler as above and Android NDK 27d (only building
 the Android SDKs on linux works for now). Check out this repo and run
-`SWIFT_TAG=swift-6.1.3-RELEASE ANDROID_ARCH=aarch64 swift get-packages-and-swift-source.swift`
+`SWIFT_TAG=swift-6.2-RELEASE ANDROID_ARCH=aarch64 swift get-packages-and-swift-source.swift`
 to get some prebuilt Android libraries and the Swift source to build an AArch64
-SDK. If you pass in a different tag like `swift-DEVELOPMENT-SNAPSHOT-2025-04-03-a`
+SDK. If you pass in a different tag like `swift-DEVELOPMENT-SNAPSHOT-2025-09-14-a`
 for the latest Swift trunk snapshot and pass in the path to the corresponding
 prebuilt Swift toolchain to `build-script` below, you can build a Swift trunk
 SDK too, as seen on the CI.
@@ -155,14 +151,14 @@ git apply swift-android.patch swift-android-testing-release.patch
 perl -pi -e 's%r26%r27%' swift/stdlib/cmake/modules/AddSwiftStdlib.cmake
 ```
 
-After making sure [needed build tools like python 3, CMake, and ninja](https://github.com/swiftlang/swift/blob/release/6.1/docs/HowToGuides/GettingStarted.md#linux)
+After making sure [needed build tools like python 3, CMake, and ninja](https://github.com/swiftlang/swift/blob/release/6.2/docs/HowToGuides/GettingStarted.md#linux)
 are installed, run the following `build-script` command with your local paths
 substituted instead:
 ```
 ./swift/utils/build-script -RA --skip-build-cmark --build-llvm=0 --android
 --android-ndk /home/finagolfin/android-ndk-r27d/ --android-arch aarch64 --android-api-level 24
---build-swift-tools=0 --native-swift-tools-path=/home/finagolfin/swift-6.1.3-RELEASE-ubuntu22.04/usr/bin/
---native-clang-tools-path=/home/finagolfin/swift-6.1.3-RELEASE-ubuntu22.04/usr/bin/
+--build-swift-tools=0 --native-swift-tools-path=/home/finagolfin/swift-6.2-RELEASE-ubuntu22.04/usr/bin/
+--native-clang-tools-path=/home/finagolfin/swift-6.2-RELEASE-ubuntu22.04/usr/bin/
 --host-cc=/usr/bin/clang-13 --host-cxx=/usr/bin/clang++-13
 --cross-compile-hosts=android-aarch64 --cross-compile-deps-path=/home/finagolfin/swift-release-android-aarch64-24-sdk
 --skip-local-build --xctest --swift-install-components='clang-resource-dir-symlink;license;stdlib;sdk-overlay'
@@ -225,7 +221,7 @@ packages, by compiling against a more recent Android API that doesn't need the
 `libandroid-spawn` backport, and by cross-compiling libcurl/libxml2 and their
 dependencies yourself or not using FoundationNetworking and FoundationXML.
 
-Finally, it gets [the 6.1.3 source](https://github.com/swiftlang/swift/releases/tag/swift-6.1.3-RELEASE)
+Finally, it gets [the 6.2 source](https://github.com/swiftlang/swift/releases/tag/swift-6.2-RELEASE)
 tarballs for eleven Swift repos and renames them to `llvm-project/`, `swift/`,
 `swift-syntax`, `swift-experimental-string-processing`, `swift-corelibs-libdispatch`,
 `swift-corelibs-foundation`, `swift-collections`, `swift-foundation`,