Verilator 4.210 2021-07-07 released

[wsnyder]

Verilator 4.210 2021-07-07

Major:

• Generated code is now emitted as global functions rather than methods. '$c'
  contents might need to be updated, see the docs (Convert to emit 'loose methods' with explicit 'self' pointers verilator#3006). [Geza Lore]
• The generated model class instantiated by the user is now an interface
  object and no longer the TOP module instance. User code with direct
  C++ member access to model internals, including verilator public_flat
  items will likely need to be updated. See the manual for instructions:
  https://verilator.org/guide/latest/connecting.html#porting-from-pre-4-210
  (Make TOP part of Sym verilator#3036). [Geza Lore]

Minor:

• Add --prof-c to pass profiling to compiler (profiling verilator verilator#3059). [Alexander Grobman]
• Optimize a lot more model variables into function locals (Improve V3Localize verilator#3027). [Geza Lore]
• Support middle-of-design nested topmodules (Support middle-of-design nested topmodules verilator#3026). [Dan Petrisko]
• Remove deprecated --no-relative-cfuncs option (Remove deprecated --no-relative-cfuncs verilator#3024). [Geza Lore]
• Remove deprecated --inhibit-sim option (Remove deprecated --inhibit-sim verilator#3035). [Geza Lore]
• Merge const static data globally into a new constant pool (Implement a distinct constant pool verilator#3013). [Geza Lore]
• Allow configure override of AR program (Non-GNU implementation of the ar command does not read command-line options from file verilator#2999). [ahouska]
• In XML, show pinIndex information (XML missing instance port connection (Verilog 1995, ordered list) verilator#2877). [errae233]
• Fix error on unsupported recursive functions (Support recursive functions (and/or better error) verilator#2957). [Trefor Southwell]
• Fix type parameter specialization when struct names are same ('parameter type' data type bit width changes unexpectedly verilator#3055). [7FM]
• Improve speed of table optimization (-OA) pass. [Geza Lore]