RedPanda-CPP/docs/detailed-build-win.md

# More Build Instructions for Windows

| Library + Toolchain \ Target | x86 | x64 | ARM64 |
| ---------------------------- | --- | --- | ----- |
| MSYS2 + GNU-based MinGW | ✔️ | ✔️ | ❌ |
| MSYS2 + LLVM-based MinGW | ✔️ | ✔️ | ✔️ |
| [Windows XP](https://github.com/redpanda-cpp/qtbase-xp) + [MinGW UCRT](https://github.com/redpanda-cpp/mingw-lite) | ✔️ | ✔️ | ❌ |
| Qt.io + MinGW | ✔️ | ✔️ | ❌ |
| Qt.io + MSVC | ✔️ | ✔️ | ❌ |
| vcpkg + MSVC | ✔️ | ✔️ | ❌ |

qmake variables:
- `PREFIX`: where `$MAKE install` installs files to.
- `WINDOWS_PREFER_OPENCONSOLE=ON` (make phase): prefer UTF-8 compatible `OpenConsole.exe`.
  - `OpenConsole.exe` is a part of Windows Terminal. UTF-8 input support was added in version 1.18.
  - `OpenConsole.exe` requires ConPTY, which was introduced in Windows 10 1809.

Notes for Windows on ARM:
- Red Panda C++ can be built for ARM64 ABI only on Windows 11 ARM64, while it is supposed (but not tested) to run on Windows 10 ARM64.
  - ARM64EC (“emulation compatible”) host is not supported, i.e., Red Panda C++ cannot be built with ARM64EC toolchain.
  - ARM64EC target is (theoretically) supported, i.e. Red Panda C++ will build ARM64EC binaries if upstream toolchain supports ARM64EC.
- With the [ARM32 deprecation in Windows 11 Insider Preview Build 25905](https://blogs.windows.com/windows-insider/2023/07/12/announcing-windows-11-insider-preview-build-25905/), ARM32 support will never be added.

## Maunally Build in MSYS2

Prerequisites:

0. Windows 8.1 x64 or later, or Windows 11 ARM64.
1. Install MSYS2.
2. In selected environment, install toolchain and Qt 5 library:
   ```bash
   pacman -S \
     $MINGW_PACKAGE_PREFIX-{toolchain,qt5-static} \
     git
   ```

To build:

1. In selected environment, set related variables:
   ```bash
   SRC_DIR="/c/src/redpanda-src" # “C:\src\redpanda-src” for example
   BUILD_DIR="/c/src/redpanda-build" # “C:\src\redpanda-build” for example
   INSTALL_DIR="/c/src/redpanda-pkg" # “C:\src\redpanda-pkg” for example
   ```
2. Navigate to build directory:
   ```bash
   rm -rf "$BUILD_DIR" # optional for clean build
   mkdir -p "$BUILD_DIR" && cd "$BUILD_DIR"
   ```
3. Configure, build and install:
   ```bash
   $MSYSTEM_PREFIX/qt5-static/bin/qmake PREFIX="$INSTALL_DIR" "$SRC_DIR/Red_Panda_CPP.pro"
   mingw32-make -j$(nproc)
   mingw32-make install
   ```

## Qt.io Qt Library with MinGW Toolchain or MSVC Toolchain

Prerequisites:

0. Windows 7 x64 or later. ARM64 is not supported.
1. Install Qt with online installer from [Qt.io](https://www.qt.io/download-qt-installer-oss).
   - Select the library (in _Qt_ group, _Qt 5.15.2_ subgroup, check at lease one of _MinGW 8.1.0 32-bit_, _MinGW 8.1.0 64-bit_, _MSVC 2019 32-bit_ or _MSVC 2019 64-bit_).
   - For MinGW toolchain, select the toolchain (in _Qt_ group, _Developer and Designer Tools_ subgroup, check _MinGW 8.1.0 32-bit_ or _MinGW 8.1.0 64-bit_, matching the library).
   - Optionally select Qt Creator (in _Qt_ group, _Developer and Designer Tools_ subgroup; recomended for MSVC toolchain for parallel build support).
2. For MSVC toolchain, install Visual Studio 2019 or later, or Visual Studio Build Tools 2019 or later, with _Desktop Development with C++_ workload.
   - In _Installation Details_ panel, under the _Desktop Development with C++_ workload, select at least one _MSVC x86/x64 build tools_ and one _Windows SDK_.

To build:

1. Launch Qt environment from Start Menu.
2. In Qt environment, set related variables:
   ```bat
   rem no quotes even if path contains spaces
   set SRC_DIR=C:\src\redpanda-src
   set BUILD_DIR=C:\src\redpanda-build
   set INSTALL_DIR=C:\src\redpanda-pkg
   rem for MSVC toolchain
   set VS_INSTALL_PATH=C:\Program Files\Microsoft Visual Studio\2022\Community
   rem for MSVC toolchain; or x86
   set VC_ARCH=amd64
   rem for MSVC toolchain; keep unset if Qt Creator is not installed
   set QT_CREATOR_DIR=C:\Qt\Tools\QtCreator
   ```
3. Navigate to build directory:
   ```bat
   rem optional for clean build
   rmdir /s /q "%BUILD_DIR%"
   mkdir "%BUILD_DIR%" && cd /d "%BUILD_DIR%"
   ```
4. Configure, build and install. For MinGW toolchain:
   ```bat
   qmake PREFIX="%INSTALL_DIR%" "%SRC_DIR%\Red_Panda_CPP.pro"
   mingw32-make -j%NUMBER_OF_PROCESSORS%
   mingw32-make install
   windeployqt "%INSTALL_DIR%\RedPandaIDE.exe"
   ```
   For MSVC toolchain:
   ```bat
   call "%VS_INSTALL_PATH%\Common7\Tools\VsDevCmd.bat" -arch=%VC_ARCH%
   qmake PREFIX="%INSTALL_DIR%" "%SRC_DIR%\Red_Panda_CPP.pro"

   set JOM=%QT_CREATOR_DIR%\bin\jom\jom.exe
   if "%QT_CREATOR_DIR%" neq "" (
      "%JOM%" -j%NUMBER_OF_PROCESSORS%
      "%JOM%" install
   ) else (
      nmake
      nmake install
   )
   windeployqt "%INSTALL_DIR%\RedPandaIDE.exe"
   ```

## Advanced Option: vcpkg Qt Static Library with MSVC Toolchain

Prerequisites:

0. Windows 7 x64 or later. ARM64 is not supported.
   - For a fresh installation of Windows 7, install following components in order:
     1. SHA-2 code signing support (prerequisite of .NET Framework 4.8),
     2. .NET Framework 4.8 (prerequisite of Windows Management Framework 5.1 and Visual Studio; also optional dependency of Git for Windows),
     3. Windows Management Framework 5.1 (prerequisite of vcpkg bootstrapping).
1. Install Visual Studio 2017 or later, or Visual Studio Build Tools 2017 or later, with _Desktop Development with C++_ workload.
   - In _Installation Details_ panel, under the _Desktop Development with C++_ workload, select at least one _MSVC x86/x64 build tools_ and one _Windows SDK_.
2. Install [standalone vcpkg](https://vcpkg.io/en/getting-started).
   - As of 2023.08.09, [a patch](./packages/windows/vcpkg-win7-2023.08.09.patch) is required for Windows 7 to use compatible version of Python. Affected files will change over time, so manually edit them to apply the patch.
3. Install Qt with vcpkg.
   ```ps1
   $TARGET = "x64-windows-static" # or "x86-windows-static"
   vcpkg install qt5-base:$TARGET qt5-svg:$TARGET qt5-tools:$TARGET
   ```

To build with VS 2019 or later in PowerShell (Core) or Windows PowerShell:

1. Set related variables:
   ```ps1
   $SRC_DIR = "C:\src\redpanda-src"
   $BUILD_DIR = "C:\src\redpanda-build"
   $INSTALL_DIR = "C:\src\redpanda-pkg"
   $VCPKG_ROOT = "C:\src\vcpkg"
   $VCPKG_TARGET = "x64-windows-static" # or "x86-windows-static"
   $VS_INSTALL_PATH = "C:\Program Files\Microsoft Visual Studio\2022\Community"
   $VC_ARCH = "amd64" # or "x86"
   $JOM = "$VCPKG_ROOT\downloads\tools\jom\jom-1.1.3\jom.exe" # check the version
   ```
2. Navigate to build directory:
   ```ps1
   Remove-Item -Recurse -Force "$BUILD_DIR" # optional for clean build
   (New-Item -ItemType Directory -Force "$BUILD_DIR") -and (Set-Location "$BUILD_DIR")
   ```
3. Configure, build and install:
   ```ps1
   Import-Module "$VS_INSTALL_PATH\Common7\Tools\Microsoft.VisualStudio.DevShell.dll"
   Enter-VsDevShell -VsInstallPath "$VS_INSTALL_PATH" -SkipAutomaticLocation -DevCmdArguments "-arch=$VC_ARCH"
   & "$VCPKG_ROOT\installed\$VCPKG_TARGET\tools\qt5\bin\qmake.exe" PREFIX="$INSTALL_DIR" "$SRC_DIR\Red_Panda_CPP.pro"
   & "$JOM" "-j${Env:NUMBER_OF_PROCESSORS}"
   & "$JOM" install
   ```

To build with VS 2017 or later in Command Prompt:

1. Launch proper VC environment from Start Menu.
2. Set related variables:
   ```bat
   rem no quotes even if path contains spaces
   set SRC_DIR=C:\src\redpanda-src
   set BUILD_DIR=C:\src\redpanda-build
   set INSTALL_DIR=C:\src\redpanda-pkg
   set VCPKG_ROOT=C:\src\vcpkg
   rem or x86-windows-static
   set VCPKG_TARGET=x64-windows-static
   rem check the version
   set JOM=%VCPKG_ROOT%\downloads\tools\jom\jom-1.1.3\jom.exe
   ```
3. Navigate to build directory:
   ```bat
   rem optional for clean build
   rmdir /s /q "%BUILD_DIR%"
   mkdir "%BUILD_DIR%" && cd /d "%BUILD_DIR%"
   ```
4. Configure, build and install:
   ```bat
   "%VCPKG_ROOT%\installed\%VCPKG_TARGET%\tools\qt5\bin\qmake.exe" PREFIX="%INSTALL_DIR%" "%SRC_DIR%\Red_Panda_CPP.pro"
   "%JOM%" -j%NUMBER_OF_PROCESSORS%
   "%JOM%" install
   ```