• Bison for Windows: https://github.com/lexxmark/winflexbison
• Other platforms: https://www.gnu.org/software/bison

To generate asmparse.cpp, run either of following:

• Unix: yacc asmparse.y -o prebuilt/asmparse.cpp
• Windows: win_bison asmparse.y -o prebuilt\asmparse.cpp

$ cd runtime

# run a throw-away-after-exit container with --rm
$ docker run --rm -v$(pwd):/runtime -w /runtime/src/coreclr/ilasm alpine \
    sh -c 'apk add bison && yacc asmparse.y -o prebuilt/asmparse.cpp'

To generate grammar, see GrammarExtractor README.