How to Build OSMesa on Mac

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

3. Enter directory:

cd ~/messa

4. Unzip Mesa,

tar xvf ~/Downloads/mesa-21.1.3.tar.xz

5. 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.

6. Enter brew shell:

brew sh

7. Create build directory:

mkdir ~/mesa/build

8. Change to source directory:

cd ~/mesa/mesa-21.1.3

9. 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

10. Build Mesa

ninja -C ~/mesa/build

11. Copy libOSMesa to Boxedwine

cp ../build/src/gallium/targets/osmesa/libOSMesa.8.dylib ~/Boxedwine/lib/mac/precompiledMac  (or wherever the Boxedwine source is)

12. Copy libglapi to Boxedwine

cp ../build/src/mapi/shared-glapi/libglapi.0.dylib ~/Boxedwine/lib/mac/precompiledMac

13. Switch to Boxedwine lib directory:

cd ~/Boxedwine/lib/mac/precompiledMac

14. 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