Finalize Windows port with size analysis reporting and updated docs

1 files changed, 20 insertions, 0 deletions

diff --git a/BUILD.md b/BUILD.md
index d8501dc..3a581b1 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -7,3 +7,23 @@ cmake --build build
 Size-optimized build:
 cmake -S . -B build -DDEMO_SIZE_OPT=ON
 cmake --build build
+
+## Windows Cross-Compilation (from macOS)
+
+Requires `mingw-w64` and `wine-stable` (for testing).
+
+1. Fetch Windows binaries:
+   ```bash
+   ./scripts/fetch_win_deps.sh
+   ```
+
+2. Build for Windows:
+   ```bash
+   ./scripts/build_win.sh
+   ```
+   This will produce `build_win/demo64k_packed.exe`.
+
+3. Run with Wine:
+   ```bash
+   ./scripts/run_win.sh
+   ```