Add VERILATOR define by default

pyproject.toml

@@ -35,7 +35,7 @@ name = "fpga-sim"  # REQUIRED, is the only field that cannot be marked as dynami
 # https://packaging.python.org/guides/single-sourcing-package-version/
 
 # dynamic = ["version"]
-version = "0.3.1"  # REQUIRED, although can be dynamic
+version = "0.3.2"  # REQUIRED, although can be dynamic
 
 # This is a one-line description or tagline of what your project does. This
 # corresponds to the "Summary" metadata field:

src/fpga_sim/fpga_sim.py

@@ -71,6 +71,8 @@ def fpga_sim_main():
                 print(f"{define}: {cfg_defines[define]}, {os.path.expandvars(cfg_defines[define])}")
                 defines[define] = os.path.expandvars(cfg_defines[define])
 
+            cfg_defines["VERILATOR"] = None
+
     parse_cfg(cfg, base_path)
 
     # 4: Run those tests