Building on Windows

[ser-pounce]

Courtesy of Daemeous

• Windows builds of the three compilers (2.7.2-psx, 2.7.2-cdk, 2.8.1-psx). Added in Windows builds of cc1 and cpp (2.7.2-psx, 2.7.2-cdk, 2.8.1-psx) decompals/old-gcc#38. Their cc1.exe output is byte-identical to the 0.17 Linux cc1 for all 289 of rood-reverse's C sources. Until then they're in this release, with sources.
• mipsel binutils for Windows: binutils 2.46.0 cross-built with MinGW-w64 (same release).
• mkpsxiso and xdelta3 have official Windows downloads (mkpsxiso-2.30-win64.zip, xdelta3-3.2.2-windows-x86_64.zip), where psxiso.mk / xdelta.mk fetch the Linux ones.
• Python from python.org's Windows build, not MSYS2's: PyPI has ready-built Windows wheels for numpy, pandas, Pillow and splat's dependencies. The venv then lives in tools/python/Scripts/python.exe (so VPYTHON changes).
• Two Windows quirks:
  • Windows Python writes CRLF to pipes, which breaks cpp | vsStringTransformer | cc1. A sitecustomize.py in the venv doing sys.stdout.reconfigure(newline="\n") fixes it.
  • The BATTLE.PRG and MAINMENU.PRG FIXUP runs xdelta3 -dfans $@ ... $@, patching a file in place, which Windows refuses. Writing to a temporary file and moving it over works. Also, make exports a command-line XDELTA=... override, and xdelta3 reads $XDELTA as extra options, so the override needs a different variable name or an unset.

The builder-side versions of all this are in pc/windows_builder (files/build-native.sh, files/native-helpers/). The build ran on Windows 11 with MSYS2 (GCC 16.2, make 4.4.1).