verilator/docs/guide/deprecations.rst

.. Copyright 2003-2023 by Wilson Snyder.
.. SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

Deprecations
============

The following deprecated items are scheduled for future removal:

C++11 compiler support
  Verilator currently requires a C++20 or newer compiler for timing, and a
  C++11 or newer compiler for no-timing.

  Verilator will require C++14 or newer compilers for both compiling
  Verilator and compiling Verilated models with --no-timing no sooner than
  January 2023.

  Verilator will require C++20 or newer compilers for both compiling
  Verilator and compiling all Verilated models no sooner than January 2025.

Verilated_heavy.h
  The legacy "verilated_heavy.h" include was replaced with just including
  "verilated.h". Verilated_heavy.h is planned for removal no sooner than
  July 2022.

Option `-O<letter>`
  The debug `-O<letter>` options have been replaced with
  `-fno-<optimization>` debug options to match GCC. The old options are
  planned for removal no sooner than June 2023.

Option `--prof-threads`
  The `--prof-threads` option has been superseded by the `--prof-exec` and
  `--prof-pgo` options and is planned for removal no sooner than April 2023.

Verilated model options `+verilator+prof+threads+*`
  The `+verilator+prof+threads+start`, `+verilator+prof+threads+window` and
  `+verilator+prof+threads+file` options have been superseded by the
  `+verilator+prof+exec+start`, `+verilator+prof+exec+window` and
  `+verilator+prof+exec+file` options respectively and are planned for removal
  no sooner than April 2023.