tce-load -i compiletc meson libdrm-dev libXvmc-dev libXdamage-dev libxshmfence-dev libXxf86vm-dev libXrandr-dev gettext elfutils-dev zstd-dev glslang python3.9-pyyaml python3.9-mako llvm19-dev libclc-dev spirv-llvm-translator-dev py3.9-ply clang libva22-dev libvdpau-dev

sudo cp -rp /tmp/tcloop/llvm19-dev/usr/local/bin/llvm-config /usr/local/bin

wget https://mesa.freedesktop.org/archive/mesa-25.2.5.tar.xz

llvm required for the r300, r600, and radeonsi drivers, and the LLVMpipe software rasterizer which can make the swrast driver much faster

cd mesa-25.2.5

mkdir build
cd build

CC="gcc -flto -march=pentium-m -mtune=i686 -Os -pipe" CXX="g++ -flto -march=pentium-m -mtune=i686 -Os -pipe -DNDEBUG" meson --prefix=/usr/local --buildtype=plain -Dvalgrind=disabled -Dlibunwind=disabled -Dplatforms=x11 -Dvulkan-drivers="amd,intel,intel_hasvk,swrast" ../

[-fno-rtti fails]

ninja [39m 3.98s]
sudo ninja install

mesa 25.2.5

  Directories
    prefix           : /usr/local
    libdir           : lib
    includedir       : include

  Common C and C++ arguments
    c_cpp_args       : -mtls-dialect=gnu2
                       -msse2
                       -mfpmath=sse
                       -mstackrealign

  OpenGL
    OpenGL           : YES
    ES1              : YES
    ES2              : YES
    GLVND            : NO

  DRI
    Platform         : drm
    Driver dir       : /usr/local/lib/dri

  GLX
    Enabled          : YES
    Provider         : dri

  EGL
    Enabled          : YES
    Drivers          : builtin:egl_dri2 builtin:egl_dri3
    Platforms        : x11 surfaceless drm xcb

  GBM
    Enabled          : YES
    External libgbm  : NO
    Backends path    : /usr/local/lib/gbm

  Vulkan
    Drivers          : amd intel intel_hasvk swrast
    Platforms        : x11 surfaceless drm xcb
    ICD dir          : share/vulkan/icd.d
    Intel Ray tracing: NO

  Video
    Codecs           : all_free av1dec av1enc vp9dec
    APIs             : vdpau va vulkan

  LLVM
    Required         : enabled
    Version          : 19.1.0

  Gallium
    Enabled          : YES
    Drivers          : r300 r600 radeonsi nouveau virgl svga llvmpipe softpipe iris crocus i915 zink
    Platforms        : x11 surfaceless drm xcb
    Frontends        : mesa vdpau va
    HUD lm-sensors   : NO

  Perfetto
    Enabled          : NO

  Teflon (TensorFlow Lite delegate)
    Enabled          : NO

  User defined options
    buildtype        : plain
    libunwind        : disabled
    platforms        : x11
    prefix           : /usr/local
    valgrind         : disabled
    vulkan-drivers   : amd,intel,intel_hasvk,swrast