Cross Compile to x86_64-linux-android

I am trying to cross compile OpenSSL on Windows x64 targeting x86_64-linux-android using cargo build --target=x86_64-linux-android. However, during the compilation process, the path for the mysys Perl installation inside of the OpenSSL make file is being overridden with a Windows-style path, leading to an invalid path and a compiler crash.

Issue:

When using cargo to build a project that depends on OpenSSL for the target x86_64-linux-android, the mysys Perl path is incorrectly being replaced with a Windows-style path, causing the compiler to fail to locate the Perl executable.

Steps to Reproduce:

Note: Only replicatable in a Windows Environment.

1. Install the x86_64-linux-android target for Rust.
2. Install msys or any other UNIX compatable Perl.
3. Target the correct version of Perl inside .cargo/config.toml.
4. Create a simple Rust project that depends on OpenSSL.
5. Run cargo build --target=x86_64-linux-android.

Expected Behavior:

The compiler should correctly locate and use the mysys Perl installation at the specified path.

Actual Behavior:

The mysys Perl path is overridden with a Windows-style path, which results in the compiler failing to find the Perl executable and crashing.

Environment:

• Windows x64
• Rust toolchain: rustc 1.79.0 (129f3b996 2024-06-10)
• OpenSSL version: [Specify your OpenSSL version here]
• mysys Perl installation: [Specify the path to your mysys Perl installation here]

Log Output:

--- stderr
  /usr/bin/sh: line 1: C:msys64usrbinperl.exe: command not found
  make: *** [Makefile:2906: builddata.pm] Error 127
  thread 'main' panicked at C:\Users\PFG346\.cargo\registry\src\index.crates.io-6f17d22bba15001f\openssl-src-300.3.1+3.3.1\src\lib.rs:621:9:

I believe this issue is related to the cross-compilation environment not correctly handling the mysys Perl path.
I would appreciate any guidance on how to resolve this issue.

Start by reproducing the Windows cross-compilation command with the target version of Perl configured in .cargo/config.toml. Inspect Makefile:2906 and openssl-src.../src/lib.rs:621, where the failing command is reported. Done means the Perl path remains valid for x86_64-linux-android and cargo build completes without the compiler crash.