Commentary (#3436).

bin/verilator

@@ -319,7 +319,7 @@ detailed descriptions of these arguments.
      -f <file>                  Parse arguments from a file
      -FI <file>                 Force include of a file
     --flatten                   Force inlining of all modules, tasks and functions
-    --fno-<optimization>        Disable internal optimization stage
+     -fno-<optimization>        Disable internal optimization stage
      -G<name>=<value>           Overwrite top-level parameter
     --gdb                       Run Verilator under GDB interactively
     --gdbbt                     Run Verilator under GDB for backtrace

docs/guide/deprecations.rst

@@ -20,9 +20,9 @@ Option `--cdc`
   The experimental `--cdc` option is believed to be generally unused and is
   planned for removal no sooner than January 2023.
 
-Option `--O<letter>`
+Option `-O<letter>`
-  The debug `--O<letter>` options have been replaced with
+  The debug `-O<letter>` options have been replaced with
-  `--fno-<optimization>` debug options to match GCC. The old options are
+  `-fno-<optimization>` debug options to match GCC. The old options are
   planned for removal no sooner than June 2023.
 
 Option `--prof-threads`

docs/guide/exe_verilator.rst

@@ -431,47 +431,47 @@ Summary:
    flattening large designs may require significant CPU time, memory and
    storage.
 
-.. option:: --fno-acyc-simp
+.. option:: -fno-acyc-simp
 
-.. option:: --fno-assemble
+.. option:: -fno-assemble
 
-.. option:: --fno-case
+.. option:: -fno-case
 
-.. option:: --fno-combine
+.. option:: -fno-combine
 
-.. option:: --fno-const
+.. option:: -fno-const
 
-.. option:: --fno-const-bit-op-tree
+.. option:: -fno-const-bit-op-tree
 
-.. option:: --fno-dedup
+.. option:: -fno-dedup
 
-.. option:: --fno-expand
+.. option:: -fno-expand
 
-.. option:: --fno-gate
+.. option:: -fno-gate
 
-.. option:: --fno-inline
+.. option:: -fno-inline
 
-.. option:: --fno-life
+.. option:: -fno-life
 
-.. option:: --fno-life-post
+.. option:: -fno-life-post
 
-.. option:: --fno-localize
+.. option:: -fno-localize
 
-.. option:: --fno-merge-cond
+.. option:: -fno-merge-cond
 
-.. option:: --fno-merge-const-pool
+.. option:: -fno-merge-const-pool
 
-.. option:: --fno-reloop
+.. option:: -fno-reloop
 
-.. option:: --fno-reorder
+.. option:: -fno-reorder
 
-.. option:: --fno-split
+.. option:: -fno-split
 
-.. option:: --fno-subst
+.. option:: -fno-subst
 
-.. option:: --fno-subst-const
+.. option:: -fno-subst-const
 
-.. option:: --fno-table
+.. option:: -fno-table
 
    Rarely needed. Disables one of the internal optimization steps. These
    are typically used only when recommended by a maintainer to help debug

test_regress/t/t_case_write1.pl

@@ -11,7 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 scenarios(simulator => 1);
 
 compile(
-    verilator_flags2 => ["--stats --O3 -x-assign fast"],
+    verilator_flags2 => ["--stats -O3 -x-assign fast"],
     );
 
 execute(

test_regress/t/t_case_write2.pl

@@ -11,7 +11,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 scenarios(simulator => 1);
 
 compile(
-    verilator_flags2 => ["--stats --O3 -x-assign fast"],
+    verilator_flags2 => ["--stats -O3 -x-assign fast"],
     );
 
 execute(