New runtime function __enable_vm_eval__() to control use of VM evaluator. * libinterp/parse-tree/pt-vm-eval.cc (F__enable_vm_eval__): New file. New DEFUN for __enable_vm_eval__ protected by #ifdef on configuration variable OCTAVE_ENABLE_VM_EVALUATOR. * libinterp/parse-tree/module.mk: Add pt-vm-eval.cc to build system.

Name: @PACKAGE_NAME@
Description: C++ interface to GNU Octave interpreter.
URL: https://www.octave.org
Version: @PACKAGE_VERSION@
Requires: octave = @PACKAGE_VERSION@
Requires.private:
Libs: -L@octlibdir@ @LIBOCTINTERP@
Libs.private:
Cflags: -I@octincludedir@/..