When cross compiling Rust to Android on Windows, Rust 1.69.0+ can't find the version script path.

[moe-deer]

On Windows, when cross compiling Rust code to generate an Android .so library, using Rust versions 1.69.0 or newer can result in compile errors about the version script.
The error happens because the Rust compiler tries to pass a path to a version script to the linker, but that specified path does not actually exist on Windows.

I tried this code:

cargo build --release --target=aarch64-linux-android

I expected to see this happen:

Finished release [optimized] target(s) in 2.44s

Instead, this happened:

error: linking with `D:/NDK/android-ndk-r25c/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android30-clang.cmd` failed: exit code: 255                                                                
  |
  = note: "D:/NDK/android-ndk-r25c/toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android30-clang.cmd" "-Wl,--version-script=C:\\Users\\Liste\\AppData\\Local\\Temp\\rustcPwRX2e\\list" "-Wl,--no-undefi
ned-version" "C:\\Users\\Liste\\AppData\\Local\\Temp\\rustcPwRX2e\\symbols.o" "E:\\idea_projects\\my_lib\\target\\aarch64-linux-android\\release\\deps\\my_lib.my_lib.d56b3372c49eacad-cgu.0.rcgu.o" "
-Wl,--as-needed" "-L" "E:\\idea_projects\\my_lib\\target\\aarch64-linux-android\\release\\deps" "-L" "E:\\idea_projects\\my_lib\\target\\release\\deps" "-L" "C:\\Users\\Liste\\.rustup\\toolchains\\stable-
x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib" "-Wl,-Bstatic" "C:\\Users\\Liste\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\aarch64-linux-android\\lib\\libcompiler_builtins-0
1f0855226f8e564.rlib" "-Wl,-Bdynamic" "-ldl" "-llog" "-lunwind" "-ldl" "-lm" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "C:\\Users\\Liste\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\a
arch64-linux-android\\lib" "-o" "E:\\idea_projects\\my_lib\\target\\aarch64-linux-android\\release\\deps\\libmy_lib.so" "-Wl,--gc-sections" "-shared" "-Wl,-z,relro,-z,now" "-Wl,--strip-all" "-nodefaultlibs"
  = note: --version-script=C:\Users\Liste\AppData\Local\Temp\rustcPwRX2e\list"" was unexpected at this time.


warning: `my_lib` (lib) generated 2 warnings                                                                                                                                                                     
error: could not compile `my_lib` (lib) due to previous error; 2 warnings emitted

Meta

rustc --version --verbose:

rustc 1.71.0 (8ede3aae2 2023-07-12)
binary: rustc
commit-hash: 8ede3aae28fe6e4d52b38157d7bfe0d3bceef225
commit-date: 2023-07-12
host: x86_64-pc-windows-msvc
release: 1.71.0
LLVM version: 16.0.5

[jyn514]

you are using an MSVC host toolchain and the compiler is passing unix-style flags. do you see this same problem on windows-gnu or only on MSVC?

[moe-deer]

I encountered this issue on both windows-gnu and MSVC. They work correctly in rust 1.68.2 version, but the problem appears in versions after that.

[apiraino]

@moe-deer Does it also happen with a new Rust project? Any chance you can provide a small bare Rust project template to reproduce the issue? Just to be sure I understand: is the correct Windows path to your Android NDK D:\\NDK\\android-ndk-r25c\\?