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 libva22-dev libvdpau-dev glslang

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

wget https://archive.mesa3d.org/mesa-24.1.7.tar.xz

libEGL/libGL dep on libgallium - dep starts after 24.1.7 and before 24.2.0-rc1

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

cd mesa-24.1.7

adding #include <llvm/IR/Module.h> to src/amd/llvm/ac_llvm_helper.cpp 

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="" ../

[-fno-rtti fails, i486 fails]

ninja [56m 48.64s]
sudo ninja install

mesa 24.1.7

  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
    Shared glapi                 : 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
    Backends path                : /usr/local/lib/gbm

  Vulkan
    Drivers                      : NO

  Video
    Codecs                       : av1dec av1enc vp9dec
    APIs                         : vdpau va xa

  LLVM
    Enabled                      : YES
    Version                      : 19.1.0

  Gallium
    Enabled                      : YES
    Drivers                      : r300 r600 radeonsi nouveau virgl svga swrast iris crocus i915 zink
    Platforms                    : x11 surfaceless drm xcb
    Frontends                    : mesa xa vdpau va
    Off-screen rendering (OSMesa): NO
    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               :