use interpreter::feval instead of global feval function * __eigs__.cc, bsxfun.cc, call-stack.cc, cellfun.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, defun.cc, gh-manager.cc, graphics.cc, gtk-manager.cc, gtk-manager.h, hook-fcn.cc, input.cc, interpreter.cc, ls-mat5.cc, lsode.cc, mex.cc, pr-output.cc, quad.cc, quadcc.cc, variables.cc, __init_fltk__.cc, __init_gnuplot__.cc, __ode15__.cc, audiodevinfo.cc, cdef-method.cc, cdef-package.cc, cdef-property.cc, ov-class.cc, ov-java.cc, ov-oncleanup.cc, op-class.cc, pt-assign.cc, pt-eval.cc, pt-id.cc: Change all uses of global feval function to use interpreter::feval instead. If necessary, use __get_interpreter__ to access global interpreter object.

--- a/libinterp/corefcn/gtk-manager.h	Thu Jan 12 08:40:45 2023 -0500
+++ b/libinterp/corefcn/gtk-manager.h	Thu Jan 12 10:22:04 2023 -0500
@@ -37,11 +37,13 @@
 
 OCTAVE_BEGIN_NAMESPACE(octave)
 
+class interpreter;
+
 class OCTINTERP_API gtk_manager
 {
 public:
 
-  gtk_manager (void) { }
+  gtk_manager (interpreter& interp) : m_interpreter (interp) { }
 
   ~gtk_manager (void)
   {
@@ -116,6 +118,8 @@
 
 private:
 
+  interpreter& m_interpreter;
+
   // The name of the default toolkit.
   std::string m_dtk;