Update ibex_demo_system.core

[jaisw7]

Fix for Verilator 5.x

Output from sample hello_world

./build/lowrisc_ibex_demo_system_0/sim-verilator/Vtop_verilator \
  --meminit=ram,./sw/c/build/demo/hello_world/demo
Simulation of Ibex Demo System
==============================

Tracing can be toggled by sending SIGUSR1 to this process:
$ kill -USR1 421326

UART: Created /dev/pts/3 for uart0. Connect to it with any terminal program, e.g.
$ screen /dev/pts/3
UART: Additionally writing all UART output to 'uart0.log'.

Simulation running, end by pressing CTRL-c.
^CReceived stop request, shutting down simulation.

Simulation statistics
=====================
Executed cycles:  57408461
Wallclock time:   39.825 s
Simulation speed: 1.44152e+06 cycles/s (1441.52 kHz)

Performance Counters
====================
Cycles:                     69899
Instructions Retired:       39498
LSU Busy:                   17890
Fetch Wait:                 2982
Loads:                      10981
Stores:                     6909
Jumps:                      3367
Conditional Branches:       2395
Taken Conditional Branches: 1258

[marnovandermaas]

This change also works for Verilator 4.210. Out of curiosity what error were you seeing when running under Verilator 5?

[jaisw7]

Sure. Here's the command I used:

fusesoc --cores-root=. run --target=sim --tool=verilator --setup --build lowrisc:ibex:demo_system

and the error log:

ERROR: In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.cpp:24:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:30:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from /usr/local/share/verilator/include/verilated.cpp:51:
/usr/local/share/verilator/include/verilatedos.h:265:3: error: #error "Verilator requires a C++14 or newer compiler"
  265 | # error "Verilator requires a C++14 or newer compiler"
      |   ^~~~~
In file included from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.h:28,
                 from /usr/local/share/verilator/include/verilated_threads.cpp:26:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.h:31,
                 from /usr/local/share/verilator/include/verilated_dpi.cpp:32:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.h:13,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilator_sim_ctrl.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_threads.h:28,
                 from /usr/local/share/verilator/include/verilated_threads.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.cpp:24:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_threads.h:28,
                 from /usr/local/share/verilator/include/verilated_threads.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.cpp:24:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_dpi.h:31,
                 from /usr/local/share/verilator/include/verilated_dpi.cpp:32:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_threads.h:28,
                 from /usr/local/share/verilator/include/verilated_threads.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.cpp:24:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_threads.h:28,
                 from /usr/local/share/verilator/include/verilated_threads.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_threads.cpp:24:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:30:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_imp.h:32,
                 from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_dpi.h:31,
                 from /usr/local/share/verilator/include/verilated_dpi.cpp:32:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:30:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_dpi.h:31,
                 from /usr/local/share/verilator/include/verilated_dpi.cpp:32:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:30:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_dpi.h:31,
                 from /usr/local/share/verilator/include/verilated_dpi.cpp:32:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:30:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ./Vtop_verilator__Syms.h:10,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.cc:9:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_imp.h:32,
                 from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.cpp:51:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_imp.h:32,
                 from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.cpp:51:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_imp.h:32,
                 from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.cpp:51:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_imp.h:32,
                 from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.cpp:51:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_dpi.cpp:34:
/usr/local/share/verilator/include/verilated_imp.h: In static member function ‘static int VerilatedImp::exportFind(const char*)’:
/usr/local/share/verilator/include/verilated_imp.h:555:34: error: unable to find string literal operator ‘operator""s’ with ‘const char [28]’, ‘long unsigned int’ arguments
  555 |         const std::string msg = ("%Error: Testbench C called "s + namep
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Vtop_verilator.mk:121: verilated_toplevel.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:275: verilated_threads.o] Error 1
In file included from /usr/local/share/verilator/include/verilated.cpp:53:
/usr/local/share/verilator/include/verilated_imp.h: In static member function ‘static int VerilatedImp::exportFind(const char*)’:
/usr/local/share/verilator/include/verilated_imp.h:555:34: error: unable to find string literal operator ‘operator""s’ with ‘const char [28]’, ‘long unsigned int’ arguments
  555 |         const std::string msg = ("%Error: Testbench C called "s + namep
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Vtop_verilator.mk:123: verilator_sim_ctrl.o] Error 1
In file included from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
make[1]: *** [Vtop_verilator.mk:125: ibex_demo_system.o] Error 1
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:275: verilated_dpi.o] Error 1
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated.h:76:22: error: ‘literals’ is not a namespace-name
   76 | using namespace std::literals;  // "<std::string literal>"s; see SF.7 core guideline
      |                      ^~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In function ‘void _vl_vsformat(std::string&, const string&, __va_list_tag*)’:
/usr/local/share/verilator/include/verilated.cpp:946:38: error: unable to find string literal operator ‘operator""s’ with ‘const char [2]’, ‘long unsigned int’ arguments
  946 |                             append = "-"s + VL_DECIMAL_NW(lbits, neg);
      |                                      ^~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated.cpp:1088:45: error: unable to find string literal operator ‘operator""s’ with ‘const char [28]’, ‘long unsigned int’ arguments
 1088 |                     const std::string msg = "Unknown _vl_vsformat code: "s + pos[0];
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from /usr/local/share/verilator/include/verilated_fst_c.cpp:26:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In function ‘IData _vl_vsscanf(FILE*, int, WDataInP, const string&, const string&, __va_list_tag*)’:
/usr/local/share/verilator/include/verilated.cpp:1370:45: error: unable to find string literal operator ‘operator""s’ with ‘const char [27]’, ‘long unsigned int’ arguments
 1370 |                     const std::string msg = "Unknown _vl_vsscanf code: "s + pos[0];
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In function ‘std::string VL_STACKTRACE_N()’:
/usr/local/share/verilator/include/verilated.cpp:1730:73: error: unable to find string literal operator ‘operator""s’ with ‘const char [2]’, ‘long unsigned int’ arguments
 1730 |     for (int j = 0; j < nptrs; j++) result += std::string{strings[j]} + "\n"s;
      |                                                                         ^~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from ../src/lowrisc_dv_verilator_simutil_verilator_0/cpp/verilated_toplevel.h:12,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system.h:5,
                 from ../src/lowrisc_ibex_demo_system_0/dv/verilator/ibex_demo_system_main.cc:5:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEvent&)’:
/usr/local/share/verilator/include/verilated_types.h:266:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  266 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In function ‘std::string VL_TO_STRING(const VlEventBase&)’:
/usr/local/share/verilator/include/verilated_types.h:277:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [11]’, ‘long unsigned int’ arguments
  277 |     return "triggered="s + (e.isTriggered() ? "true" : "false");
      |            ^~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1651:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1651 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In constructor ‘VlClassRef<T_Class>::VlClassRef(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1661:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1661 |         : m_objp{std::exchange(moved.m_objp, nullptr)} {}
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_Class>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1676:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1676 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:950,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilated_types.h: In member function ‘VlClassRef<T_Class>& VlClassRef<T_Class>::operator=(VlClassRef<T_OtherClass>&&)’:
/usr/local/share/verilator/include/verilated_types.h:1691:23: error: ‘exchange’ is not a member of ‘std’; did you mean ‘vlstd::exchange’?
 1691 |         m_objp = std::exchange(moved.m_objp, nullptr);
      |                       ^~~~~~~~
In file included from /usr/local/share/verilator/include/verilated.h:42,
                 from Vtop_verilator__pch.h:21:
/usr/local/share/verilator/include/verilatedos.h:642:3: note: ‘vlstd::exchange’ declared here
  642 | T exchange(T& obj, U&& new_value) {
      |   ^~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In static member function ‘static void Verilated::overWidthError(const char*)’:
/usr/local/share/verilator/include/verilated.cpp:2993:30: error: unable to find string literal operator ‘operator""s’ with ‘const char [24]’, ‘long unsigned int’ arguments
 2993 |     const std::string msg = ("Testbench C set input '"s + signame
      |                              ^~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In member function ‘void VerilatedScope::varInsert(int, const char*, void*, bool, VerilatedVarType, int, int, ...)’:
/usr/local/share/verilator/include/verilated.cpp:3215:37: error: unable to find string literal operator ‘operator""s’ with ‘const char [49]’, ‘long unsigned int’ arguments
 3215 |             const std::string msg = "Unsupported multi-dimensional public varInsert: "s + namep;
      |                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In static member function ‘static void* VerilatedScope::exportFindNullError(int)’:
/usr/local/share/verilator/include/verilated.cpp:3235:30: error: unable to find string literal operator ‘operator""s’ with ‘const char [21]’, ‘long unsigned int’ arguments
 3235 |     const std::string msg = ("Testbench C called '"s + VerilatedImp::exportName(funcnum)
      |                              ^~~~~~~~~~~~~~~~~~~~~~~
/usr/local/share/verilator/include/verilated.cpp: In member function ‘void* VerilatedScope::exportFindError(int) const’:
/usr/local/share/verilator/include/verilated.cpp:3245:12: error: unable to find string literal operator ‘operator""s’ with ‘const char [21]’, ‘long unsigned int’ arguments
 3245 |         = ("Testbench C called '"s + VerilatedImp::exportName(funcnum)
      |            ^~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Vtop_verilator.mk:127: ibex_demo_system_main.o] Error 1
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:275: verilated.o] Error 1
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:275: verilated_fst_c.o] Error 1
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:281: Vtop_verilator__pch.h.fast.gch] Error 1
make[1]: *** [/usr/local/share/verilator/include/verilated.mk:283: Vtop_verilator__pch.h.slow.gch] Error 1
make: *** [Makefile:13: Vtop_verilator] Error 2

ERROR: Failed to build lowrisc:ibex:demo_system:0 : '['make', '-j', '20']' exited with an error: 2