BlockLua/compiling.md

Compiling on Windows with MSYS2 (32-bit)

Follow these steps to build BlockLua.dll for 32-bit Windows using MSYS2's MinGW-w64 i686 toolchain.

1) Install MSYS2

• Download and install MSYS2 from https://www.msys2.org/.
• After installing, open the "MSYS2 MSYS" terminal once and update the package database if prompted.

2) Install required packages (i686 / 32-bit)

Run this in the "MSYS2 MSYS" or "MSYS2 MinGW 32-bit" terminal:

pacman -Sy --needed mingw-w64-i686-toolchain mingw-w64-i686-binutils mingw-w64-i686-lua51

What these packages are for:

• mingw-w64-i686-toolchain: 32-bit C/C++ compiler suite (g++, libstdc++, runtime libs) to build Windows binaries.
• mingw-w64-i686-binutils: Linker and binary utilities (ld, as, objdump) used by the compiler and for optional inspection.
• mingw-w64-i686-lua51: Lua 5.1 development files for 32-bit (import library). We use its import library to link; at runtime you can use the provided lua5.1.dll.

3) Build (PowerShell, recommended)

• Open PowerShell in the repo root.
• Run the script:

compile.bat

What the script does:

• Temporarily prepends C:\\msys64\\mingw32\\bin to PATH so the 32-bit toolchain is used.
• Compiles the project with -m32 and links against lua5.1.
• Produces build\BlockLua.dll and build\BlockLua-Unsafe.dll.

4) Optional: Verify 32-bit output

If you installed binutils, you can check the architecture:

objdump -f build\BlockLua.dll | Select-String i386

You should see architecture: i386 in the output.

Notes

• Ensure you installed the i686 (32-bit) variants of the packages; x86_64 packages won’t work for a 32-bit build.
• If the linker cannot find -llua5.1, confirm mingw-w64-i686-lua51 is installed and you are using the mingw32 toolchain (not x86_64).