集成3dfx补丁到QEMU时Meson报错：未知变量targetos

我正在开展一个项目，需要将00-qemu82x-mesa-glide.patch补丁集成到QEMU中，但构建时遇到如下错误：

"../qemu/meson.build:3829:5: ERROR: Unknown variable "targetos" "

我使用GitHub Actions实现构建流程自动化，以下是YAML文件片段：

name: msys2-64bit

on: [push]

jobs:
  build:
    runs-on: windows-latest
    strategy:
      matrix:
        cache-name: [msys64-cache]
    env:
      MSYSTEM: MINGW64
      FF_SCRIPT_SECTIONS: '0'
      CONFIGURE_ARGS: '--target-list=x86_64-softmmu --without-default-devices -Ddebug=false -Doptimization=0'
      TEST_ARGS: '--no-suite qtest'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Clone QEMU
        run: git clone https://github.com/qemu/qemu.git


      - name: Set up MSYS2
        run: |
          Write-Output "Acquiring msys2.exe installer at $(Get-Date -Format u)"
          If ( !(Test-Path -Path msys64\var\cache ) ) {
              mkdir msys64\var\cache
          }
          Invoke-WebRequest "https://repo.msys2.org/distrib/msys2-x86_64-latest.sfx.exe.sig" -outfile "msys2.exe.sig"
          if ( Test-Path -Path msys64\var\cache\msys2.exe.sig ) {
              Write-Output "Cached installer sig" ;
              if ( ((Get-FileHash msys2.exe.sig).Hash -ne (Get-FileHash msys64\var\cache\msys2.exe.sig).Hash) ) {
                  Write-Output "Mis-matched installer sig, new installer download required" ;
                  Remove-Item -Path msys64\var\cache\msys2.exe.sig ;
                  if ( Test-Path -Path msys64\var\cache\msys2.exe ) {
                      Remove-Item -Path msys64\var\cache\msys2.exe
                  }
              } else {
                  Write-Output "Matched installer sig, cached installer still valid"
              }
          } else {
              Write-Output "No cached installer sig, new installer download required" ;
              if ( Test-Path -Path msys64\var\cache\msys2.exe ) {
                  Remove-Item -Path msys64\var\cache\msys2.exe
              }
          }
          if ( !(Test-Path -Path msys64\var\cache\msys2.exe ) ) {
              Write-Output "Fetching latest installer" ;
              Invoke-WebRequest "https://repo.msys2.org/distrib/msys2-x86_64-latest.sfx.exe" -outfile "msys64\var\cache\msys2.exe" ;
              Copy-Item -Path msys2.exe.sig -Destination msys64\var\cache\msys2.exe.sig
          } else {
              Write-Output "Using cached installer"
          }
          Write-Output "Invoking msys2.exe installer at $(Get-Date -Format u)"
          msys64\var\cache\msys2.exe -y
          ((Get-Content -path .\msys64\etc\post-install\07-pacman-key.post -Raw) -replace '--refresh-keys', '--version') | Set-Content -Path .\msys64\etc\post-install\07-pacman-key.post
          .\msys64\usr\bin\bash -lc "sed -i 's/^CheckSpace/#CheckSpace/g' /etc/pacman.conf"
          .\msys64\usr\bin\bash -lc 'pacman --noconfirm -Syuu'  # Core update
          .\msys64\usr\bin\bash -lc 'pacman --noconfirm -Syuu'  # Normal update
          taskkill /F /FI "MODULES eq msys-2.0.dll"

      - name: Install dependencies
        run: |
          Write-Output "Installing mingw packages at $(Get-Date -Format u)"
          .\msys64\usr\bin\bash -lc 'pacman -Sy --noconfirm --needed \
          bison \
          diffutils \
          flex \
          git \
          grep \
          make \
          rsync \
          ninja \
          glib2-devel \
          patch \
          sed \
          mingw-w64-x86_64-binutils \
          mingw-w64-x86_64-capstone \
          mingw-w64-x86_64-ccache \
          mingw-w64-x86_64-curl \
          mingw-w64-x86_64-cyrus-sasl \
          mingw-w64-x86_64-dtc \
          mingw-w64-x86_64-gcc \
          mingw-w64-x86_64-glib2 \
          mingw-w64-x86_64-gnutls \
          mingw-w64-x86_64-gtk3 \
          mingw-w64-x86_64-libgcrypt \
          mingw-w64-x86_64-libjpeg-turbo \
          mingw-w64-x86_64-libnfs \
          mingw-w64-x86_64-libpng \
          mingw-w64-x86_64-libssh \
          mingw-w64-x86_64-libtasn1 \
          mingw-w64-x86_64-libusb \
          mingw-w64-x86_64-lzo2 \
          mingw-w64-x86_64-nettle \
          mingw-w64-x86_64-ninja \
          mingw-w64-x86_64-pixman \
          mingw-w64-x86_64-pkgconf \
          mingw-w64-x86_64-python \
          mingw-w64-x86_64-SDL2 \
          mingw-w64-x86_64-SDL2_image \
          mingw-w64-x86_64-snappy \
          mingw-w64-x86_64-spice \
          mingw-w64-x86_64-usbredir \
          mingw-w64-x86_64-zstd'

      - name: Build
        run: |
          Write-Output "Running build at $(Get-Date -Format u)"
          $env:CHERE_INVOKING = 'yes'  # Preserve the current working directory
          $env:MSYS = 'winsymlinks:native' # Enable native Windows symlink
          $env:CCACHE_BASEDIR = "$env:CI_PROJECT_DIR"
          $env:CCACHE_DIR = "$env:CCACHE_BASEDIR/ccache"
          $env:CCACHE_MAXSIZE = "500M"
          $env:CCACHE_DEPEND = 1 # cache misses are too expensive with preprocessor mode
          $env:CC = "ccache gcc"
          cd qemu
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "rsync -r ../qemu-0/hw/3dfx ./hw/"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "rsync -r ../qemu-1/hw/mesa ./hw/"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "patch -p0 -i ../00-qemu82x-mesa-glide.patch"
          mkdir build
          cd build
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "ccache --zero-stats"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "../configure --target-list=i386-softmmu --enable-whpx --enable-sdl --disable-capstone --enable-fdt=system $CONFIGURE_ARGS"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "make"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "make check MTESTARGS='$TEST_ARGS' || { cat meson-logs/testlog.txt; exit 1; } ;"
          D:\a\qemu-3dfx\qemu-3dfx\msys64\usr\bin\bash -lc "ccache --show-stats"
          Write-Output "Finished build at $(Get-Date -Format u)"
      - name: Upload artifact
        uses: actions/upload-artifact@v3
        with:
          name: 3dfx-QEMU
          path: D:\a\qemu-3dfx\qemu-3dfx\qemu\build\

解决建议 #

• 补丁版本适配：该补丁基于旧版QEMU开发，最新QEMU的meson构建系统已移除或重命名targetos变量。查看补丁仓库的提交历史，找到兼容的QEMU版本并克隆后再应用补丁。
• 修复meson变量引用：打开meson.build第3829行，将targetos替换为当前QEMU使用的对应变量，比如host_os或target_os（可搜索QEMU源码确认）。
• 更新构建依赖：执行pacman -Syu mingw-w64-x86_64-meson，确保MSYS2环境中的meson版本符合QEMU要求。
• 调整configure参数：在configure命令中添加明确的系统变量定义，比如-Dtarget_os=windows（需确认meson支持该参数）。

内容的提问来源于stack exchange，提问作者marc