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How-To-Build-OSMesa-on-Mac.md

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This is a work in progress: I will need to test this on a clean Mac

  1. Download Mesa, I used https://archive.mesa3d.org//mesa-21.1.3.tar.xz

  2. Create directory for everything:

mkdir ~/mesa
  1. Enter directory:
cd ~/messa
  1. Unzip Mesa,
tar xvf ~/Downloads/mesa-21.1.3.tar.xz
  1. Make sure you have all of the dependencies, using home brew this is
brew install pkg-config
brew install bison
brew install llvm
brew install meson
brew uninstall cmake

cmake seems to mess things up, so make sure its not installed.

  1. Enter brew shell:
brew sh
  1. Create build directory:
mkdir ~/mesa/build
  1. Change to source directory:
cd ~/mesa/mesa-21.1.3
  1. Configure Mesa for OSMesa
meson ~/mesa/build -Dgallium-drivers=swrast -Ddri-drivers= -Dvulkan-drivers= -Dprefix=~/mesa/build/install -Dlibunwind=disabled -Dosmesa=true -Degl=disabled -Dgles1=disabled -Dgles2=disabled -Dglx=disabled -Dvalgrind=disabled -Dc_std=c11 -Dshared-llvm=false -Dshared-glapi=enabled
  1. Build Mesa
ninja -C ~/mesa/build
  1. Copy libOSMesa to Boxedwine
cp ../build/src/gallium/targets/osmesa/libOSMesa.8.dylib ~/Boxedwine/lib/mac/precompiledMac  (or wherever the Boxedwine source is)
  1. Copy libglapi to Boxedwine
cp ../build/src/mapi/shared-glapi/libglapi.0.dylib ~/Boxedwine/lib/mac/precompiledMac
  1. Switch to Boxedwine lib directory:
cd ~/Boxedwine/lib/mac/precompiledMac
  1. change where libOSMesa.8.dylib looks for its dependency, libglapi.0.dylib
install_name_tool -change "@rpath/libglapi.0.dylib" "@executable_path/libglapi.0.dylib" libOSMesa.8.dylib