clarified tool setup for GHC / OCaml: discontinued "isabelle ghc", "isabelle ocaml", "isabelle ocamlc" to avoid confusion with traditional settings variables for executables (these are still required in existing applications, notably in session options [condition = ISABELLE_GHC] etc. and codegen setup;
#!/usr/bin/env bash
#
# Author: Makarius
#
# Invoke ghc via "stack".
if [ -d "$ISABELLE_STACK_ROOT" ]; then
isabelle_stack ghc -- "$@"
else
echo "Cannot execute ghc: missing Isabelle GHC setup" >&2
exit 127
fi