--- Compiling, linking C++ code ---
g++ -std=c++1y -pthread -D_REENTRANT -Wno-sign-compare -Wno-ignored-attributes      -I stan/lib/stan_math/lib/tbb_2020.3/include    -O3 -I src -I stan/src -I stan/lib/rapidjson_1.1.0/ -I lib/CLI11-1.9.1/ -I stan/lib/stan_math/ -I stan/lib/stan_math/lib/eigen_3.4.0 -I stan/lib/stan_math/lib/boost_1.78.0 -I stan/lib/stan_math/lib/sundials_6.1.1/include -I stan/lib/stan_math/lib/sundials_6.1.1/src/sundials    -DBOOST_DISABLE_ASSERTS          -c -Wno-ignored-attributes   -include /home/alecks/git/MinimalODEExample/odefunc.hpp -x c++ -o /home/alecks/git/MinimalODEExample/minimalODEExampleExternal.o /home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp
In file included from stan/lib/stan_math/lib/boost_1.78.0/boost/multi_array/multi_array_ref.hpp:32,
                 from stan/lib/stan_math/lib/boost_1.78.0/boost/multi_array.hpp:34,
                 from stan/lib/stan_math/lib/boost_1.78.0/boost/numeric/odeint/algebra/multi_array_algebra.hpp:22,
                 from stan/lib/stan_math/lib/boost_1.78.0/boost/numeric/odeint.hpp:63,
                 from stan/lib/stan_math/stan/math/prim/functor/ode_rk45.hpp:9,
                 from stan/lib/stan_math/stan/math/prim/functor/integrate_ode_rk45.hpp:6,
                 from stan/lib/stan_math/stan/math/prim/functor.hpp:15,
                 from stan/lib/stan_math/stan/math/rev/fun.hpp:198,
                 from stan/lib/stan_math/stan/math/rev.hpp:10,
                 from stan/lib/stan_math/stan/math.hpp:19,
                 from stan/src/stan/model/model_header.hpp:4,
                 from /home/alecks/git/MinimalODEExample/odefunc.hpp:3,
                 from <command-line>:
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:180:45: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  180 |         : public boost::functional::detail::unary_function<typename unary_traits<Predicate>::argument_type,bool>
      |                                             ^~~~~~~~~~~~~~
In file included from /usr/include/c++/13.1.1/string:49,
                 from /usr/include/c++/13.1.1/bits/locale_classes.h:40,
                 from /usr/include/c++/13.1.1/bits/ios_base.h:41,
                 from /usr/include/c++/13.1.1/ios:44,
                 from /usr/include/c++/13.1.1/istream:40,
                 from /usr/include/c++/13.1.1/sstream:40,
                 from /usr/include/c++/13.1.1/complex:45,
                 from stan/lib/stan_math/lib/eigen_3.4.0/Eigen/Core:50,
                 from stan/lib/stan_math/lib/eigen_3.4.0/Eigen/Dense:1,
                 from stan/lib/stan_math/stan/math/prim/fun/Eigen.hpp:22,
                 from stan/lib/stan_math/stan/math/rev.hpp:4:
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:214:45: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  214 |         : public boost::functional::detail::binary_function<
      |                                             ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:252:45: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  252 |         : public boost::functional::detail::unary_function<
      |                                             ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:299:45: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  299 |         : public boost::functional::detail::unary_function<
      |                                             ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:345:57: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  345 |     class mem_fun_t : public boost::functional::detail::unary_function<T*, S>
      |                                                         ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:361:58: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  361 |     class mem_fun1_t : public boost::functional::detail::binary_function<T*, A, S>
      |                                                          ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:377:63: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  377 |     class const_mem_fun_t : public boost::functional::detail::unary_function<const T*, S>
      |                                                               ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:393:64: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  393 |     class const_mem_fun1_t : public boost::functional::detail::binary_function<const T*, A, S>
      |                                                                ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:438:61: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  438 |     class mem_fun_ref_t : public boost::functional::detail::unary_function<T&, S>
      |                                                             ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:454:62: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  454 |     class mem_fun1_ref_t : public boost::functional::detail::binary_function<T&, A, S>
      |                                                              ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:470:67: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  470 |     class const_mem_fun_ref_t : public boost::functional::detail::unary_function<const T&, S>
      |                                                                   ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:487:68: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  487 |     class const_mem_fun1_ref_t : public boost::functional::detail::binary_function<const T&, A, S>
      |                                                                    ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:533:73: warning: ‘template<class _Arg, class _Result> struct std::unary_function’ is deprecated [-Wdeprecated-declarations]
  533 |     class pointer_to_unary_function : public boost::functional::detail::unary_function<Arg,Result>
      |                                                                         ^~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:117:12: note: declared here
  117 |     struct unary_function
      |            ^~~~~~~~~~~~~~
stan/lib/stan_math/lib/boost_1.78.0/boost/functional.hpp:557:74: warning: ‘template<class _Arg1, class _Arg2, class _Result> struct std::binary_function’ is deprecated [-Wdeprecated-declarations]
  557 |     class pointer_to_binary_function : public boost::functional::detail::binary_function<Arg1,Arg2,Result>
      |                                                                          ^~~~~~~~~~~~~~~
/usr/include/c++/13.1.1/bits/stl_function.h:131:12: note: declared here
  131 |     struct binary_function
      |            ^~~~~~~~~~~~~~~
/home/alecks/git/MinimalODEExample/odefunc.hpp: In instantiation of ‘Eigen::Matrix<stan::math::var_value<double>, -1, 1> minimalODEExampleExternal_model_namespace::odefunc(const double&, const T1__&, const double&, std::ostream*) [with T1__ = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; stan::require_all_t<stan::is_col_vector<T>, stan::is_vt_not_complex<T1__> >* <anonymous> = 0; std::ostream = std::basic_ostream<char>]’:
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:38:0:   required from ‘Eigen::Matrix<typename boost::math::tools::promote_args<T0__, typename stan::base_type<T1__, void>::type, T2__>::type, -1, 1> minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__::operator()(const T0__&, const T1__&, std::ostream*, const T2__&) const [with T0__ = double; T1__ = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; T2__ = double; stan::require_all_t<stan::is_stan_scalar<Var1>, stan::is_col_vector<Col>, stan::is_vt_not_complex<T1__>, stan::is_stan_scalar<T2__> >* <anonymous> = 0; typename boost::math::tools::promote_args<T0__, typename stan::base_type<T1__, void>::type, T2__>::type = stan::math::var_value<double>; typename stan::base_type<T1__, void>::type = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/lib/stan_math/stan/math/rev/functor/coupled_ode_system.hpp:130:40:   required from ‘stan::math::coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, stan::math::var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)> [with auto:616 = {const double&}]’
stan/lib/stan_math/stan/math/prim/functor/apply.hpp:26:11:   required from ‘constexpr decltype(auto) stan::math::internal::apply_impl(F&&, Tuple&&, std::index_sequence<I ...>) [with F = stan::math::coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, stan::math::var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)>; Tuple = std::tuple<const double&>&; long unsigned int ...I = {0}; std::index_sequence<I ...> = std::integer_sequence<long unsigned int, 0>]’
stan/lib/stan_math/stan/math/prim/functor/apply.hpp:44:30:   required from ‘constexpr decltype(auto) stan::math::apply(F&&, Tuple&&) [with F = coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)>; Tuple = std::tuple<const double&>&]’
stan/lib/stan_math/stan/math/rev/functor/coupled_ode_system.hpp:129:67:   required from ‘void stan::math::coupled_ode_system_impl<false, F, T_y0, Args ...>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double) [with F = minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__; T_y0 = stan::math::var_value<double>; Args = {const double&}]’
stan/lib/stan_math/lib/boost_1.78.0/boost/numeric/odeint/stepper/dense_output_runge_kutta.hpp:329:16:   [ skipping 4 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
stan/lib/stan_math/stan/math/prim/functor/ode_rk45.hpp:145:20:   required from ‘std::vector<Eigen::Matrix<typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type, -1, 1> > stan::math::ode_rk45_tol_impl(const char*, const F&, const T_y0&, T_t0, const std::vector<T_l>&, double, double, long int, std::ostream*, const Args& ...) [with F = minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__; T_y0 = Eigen::Matrix<var_value<double>, -1, 1>; T_t0 = double; T_ts = double; Args = {double}; stan::require_eigen_vector_t<T_CPCs>* <anonymous> = 0; typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type = var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/lib/stan_math/stan/math/prim/functor/ode_rk45.hpp:253:27:   required from ‘std::vector<Eigen::Matrix<typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type, -1, 1> > stan::math::ode_rk45(const F&, const T_y0&, T_t0, const std::vector<T_l>&, std::ostream*, const Args& ...) [with F = minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__; T_y0 = Eigen::Matrix<var_value<double>, -1, 1>; T_t0 = double; T_ts = double; Args = {double}; stan::require_eigen_vector_t<T_CPCs>* <anonymous> = 0; typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type = var_value<double>; std::ostream = std::basic_ostream<char>]’
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:297:0:   required from ‘stan::scalar_type_t<T2> minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model::log_prob_impl(VecR&, VecI&, std::ostream*) const [with bool propto__ = false; bool jacobian__ = false; VecR = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; VecI = Eigen::Matrix<int, -1, 1>; stan::require_vector_like_t<VecR>* <anonymous> = 0; stan::require_vector_like_vt<std::is_integral, VecI>* <anonymous> = 0; stan::require_st_var<VecR>* <anonymous> = 0; stan::scalar_type_t<T2> = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:543:0:   required from ‘T_ minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model::log_prob(Eigen::Matrix<T_job_param, -1, 1>&, std::ostream*) const [with bool propto__ = false; bool jacobian__ = false; T_ = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/src/stan/model/model_base_crtp.hpp:98:0:   required from ‘stan::math::var stan::model::model_base_crtp<M>::log_prob(Eigen::Matrix<stan::math::var_value<double>, -1, 1>&, std::ostream*) const [with M = minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model; stan::math::var = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/src/stan/model/model_base_crtp.hpp:96:0:   required from here
/home/alecks/git/MinimalODEExample/odefunc.hpp:37: error: invalid use of incomplete type ‘class stan::math::var_value<Eigen::Matrix<stan::math::var_value<double>, -1, 1>, void>’
   37 |   stan::math::make_callback_var(dydt, [y_arena, jacobian](auto& res){
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   38 |     y_arena.adj() += jacobian.transpose() * res.adj();
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   39 |   });
      | 
In file included from stan/lib/stan_math/stan/math/rev/core/vari.hpp:4,
                 from stan/lib/stan_math/stan/math/rev/core/var.hpp:8,
                 from stan/lib/stan_math/stan/math/rev/meta/conditional_var_value.hpp:4,
                 from stan/lib/stan_math/stan/math/rev/meta.hpp:6,
                 from stan/lib/stan_math/stan/math/rev/core/accumulate_adjoints.hpp:5,
                 from stan/lib/stan_math/stan/math/rev/core.hpp:4,
                 from stan/lib/stan_math/stan/math/rev.hpp:8:
stan/lib/stan_math/stan/math/rev/core/var_value_fwd_declare.hpp:8:7: note: declaration of ‘class stan::math::var_value<Eigen::Matrix<stan::math::var_value<double>, -1, 1>, void>’
    8 | class var_value;
      |       ^~~~~~~~~
In file included from stan/lib/stan_math/stan/math/rev/core.hpp:13:
stan/lib/stan_math/stan/math/rev/core/callback_vari.hpp: In instantiation of ‘stan::math::var_value<typename stan::plain_type<T>::type> stan::math::make_callback_var(T&&, F&&) [with T = Eigen::Matrix<var_value<double>, -1, 1>&; F = minimalODEExampleExternal_model_namespace::odefunc<Eigen::Matrix<stan::math::var_value<double>, -1, 1> >(const double&, const Eigen::Matrix<stan::math::var_value<double>, -1, 1>&, const double&, std::ostream*)::<lambda(auto:660&)>; typename stan::plain_type<T>::type = Eigen::Matrix<var_value<double>, -1, 1>]’:
/home/alecks/git/MinimalODEExample/odefunc.hpp:37:0:   required from ‘Eigen::Matrix<stan::math::var_value<double>, -1, 1> minimalODEExampleExternal_model_namespace::odefunc(const double&, const T1__&, const double&, std::ostream*) [with T1__ = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; stan::require_all_t<stan::is_col_vector<T>, stan::is_vt_not_complex<T1__> >* <anonymous> = 0; std::ostream = std::basic_ostream<char>]’
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:38:0:   required from ‘Eigen::Matrix<typename boost::math::tools::promote_args<T0__, typename stan::base_type<T1__, void>::type, T2__>::type, -1, 1> minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__::operator()(const T0__&, const T1__&, std::ostream*, const T2__&) const [with T0__ = double; T1__ = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; T2__ = double; stan::require_all_t<stan::is_stan_scalar<Var1>, stan::is_col_vector<Col>, stan::is_vt_not_complex<T1__>, stan::is_stan_scalar<T2__> >* <anonymous> = 0; typename boost::math::tools::promote_args<T0__, typename stan::base_type<T1__, void>::type, T2__>::type = stan::math::var_value<double>; typename stan::base_type<T1__, void>::type = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/lib/stan_math/stan/math/rev/functor/coupled_ode_system.hpp:130:40:   required from ‘stan::math::coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, stan::math::var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)> [with auto:616 = {const double&}]’
stan/lib/stan_math/stan/math/prim/functor/apply.hpp:26:11:   required from ‘constexpr decltype(auto) stan::math::internal::apply_impl(F&&, Tuple&&, std::index_sequence<I ...>) [with F = stan::math::coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, stan::math::var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)>; Tuple = std::tuple<const double&>&; long unsigned int ...I = {0}; std::index_sequence<I ...> = std::integer_sequence<long unsigned int, 0>]’
stan/lib/stan_math/stan/math/prim/functor/apply.hpp:44:30:   required from ‘constexpr decltype(auto) stan::math::apply(F&&, Tuple&&) [with F = coupled_ode_system_impl<false, minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__, var_value<double>, const double&>::operator()(const std::vector<double, std::allocator<double> >&, std::vector<double, std::allocator<double> >&, double)::<lambda(auto:616&& ...)>; Tuple = std::tuple<const double&>&]’
stan/lib/stan_math/stan/math/rev/functor/coupled_ode_system.hpp:129:67:   [ skipping 5 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
stan/lib/stan_math/stan/math/prim/functor/ode_rk45.hpp:145:20:   required from ‘std::vector<Eigen::Matrix<typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type, -1, 1> > stan::math::ode_rk45_tol_impl(const char*, const F&, const T_y0&, T_t0, const std::vector<T_l>&, double, double, long int, std::ostream*, const Args& ...) [with F = minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__; T_y0 = Eigen::Matrix<var_value<double>, -1, 1>; T_t0 = double; T_ts = double; Args = {double}; stan::require_eigen_vector_t<T_CPCs>* <anonymous> = 0; typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type = var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/lib/stan_math/stan/math/prim/functor/ode_rk45.hpp:253:27:   required from ‘std::vector<Eigen::Matrix<typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type, -1, 1> > stan::math::ode_rk45(const F&, const T_y0&, T_t0, const std::vector<T_l>&, std::ostream*, const Args& ...) [with F = minimalODEExampleExternal_model_namespace::odefunc_variadic2_functor__; T_y0 = Eigen::Matrix<var_value<double>, -1, 1>; T_t0 = double; T_ts = double; Args = {double}; stan::require_eigen_vector_t<T_CPCs>* <anonymous> = 0; typename stan::return_type<T_y0, T_t0, T_ts, Args ...>::type = var_value<double>; std::ostream = std::basic_ostream<char>]’
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:297:0:   required from ‘stan::scalar_type_t<T2> minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model::log_prob_impl(VecR&, VecI&, std::ostream*) const [with bool propto__ = false; bool jacobian__ = false; VecR = Eigen::Matrix<stan::math::var_value<double>, -1, 1>; VecI = Eigen::Matrix<int, -1, 1>; stan::require_vector_like_t<VecR>* <anonymous> = 0; stan::require_vector_like_vt<std::is_integral, VecI>* <anonymous> = 0; stan::require_st_var<VecR>* <anonymous> = 0; stan::scalar_type_t<T2> = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
/home/alecks/git/MinimalODEExample/minimalODEExampleExternal.hpp:543:0:   required from ‘T_ minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model::log_prob(Eigen::Matrix<T_job_param, -1, 1>&, std::ostream*) const [with bool propto__ = false; bool jacobian__ = false; T_ = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/src/stan/model/model_base_crtp.hpp:98:0:   required from ‘stan::math::var stan::model::model_base_crtp<M>::log_prob(Eigen::Matrix<stan::math::var_value<double>, -1, 1>&, std::ostream*) const [with M = minimalODEExampleExternal_model_namespace::minimalODEExampleExternal_model; stan::math::var = stan::math::var_value<double>; std::ostream = std::basic_ostream<char>]’
stan/src/stan/model/model_base_crtp.hpp:96:0:   required from here
stan/lib/stan_math/stan/math/rev/core/callback_vari.hpp:61:28: error: return type ‘class stan::math::var_value<Eigen::Matrix<stan::math::var_value<double>, -1, 1>, void>’ is incomplete
   61 | var_value<plain_type_t<T>> make_callback_var(T&& value, F&& functor) {
      |                            ^~~~~~~~~~~~~~~~~
stan/lib/stan_math/stan/math/rev/core/callback_vari.hpp:62:10: error: invalid use of incomplete type ‘class stan::math::var_value<Eigen::Matrix<stan::math::var_value<double>, -1, 1>, void>’
   62 |   return var_value<plain_type_t<T>>(
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   63 |       make_callback_vari(std::move(value), std::forward<F>(functor)));
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stan/lib/stan_math/stan/math/rev/core/var_value_fwd_declare.hpp:8:7: note: declaration of ‘class stan::math::var_value<Eigen::Matrix<stan::math::var_value<double>, -1, 1>, void>’
    8 | class var_value;
      |       ^~~~~~~~~
make: *** [make/program:58: /home/alecks/git/MinimalODEExample/minimalODEExampleExternal] Error 1