" vl gather: Collect Verilog files into a single file. Example: vl gather engine.v wrapper.v core.v \\ --search ./simlibs \\ --search ./baselibs \\ --output all-modules.v Usage: vl gather [OPTIONS] file.v [file2.v ...] Options: -h,--help Show a brief usage message and exit. --readme Show a more elaborate README and exit. -o,--output=FILE Default is \"vl_gather.v\". Where to write the collected up modules. -s,--search=DIR Control the search path for finding modules. You can give this switch multiple times, to set up multiple search paths in priority order. -I,--incdir=DIR Control the list of directories for `include files. You can give this switch multiple times. By default, we look only in the current directory. --searchext=EXT Control the search extensions for finding modules. You can give this switch multiple times. By default we just look for files named \"foo.v\" in the --search directories. But if you have Verilog files with different extensions, this won't work, so you can add these extensions here. EXT should not include the period, e.g., use \"--searchext vv\" to consider files like \"foo.vv\", etc. -D,--define=VAR Set up definitions to use before parsing begins. For instance, \"--define foo\" is similar to \"`define foo\" and \"--define foo=3\" is similar to \"`define foo 3\". Note: these defines are \"sticky\" and will override subsequent `defines in your Verilog files unless your Verilog explicitly uses `undef. You can give this option multiple times. --edition=EDITION Which edition of the Verilog standard to implement? Default: \"SystemVerilog\" (IEEE 1800-2012). You can alternately use \"Verilog\" for IEEE 1364-2005, i.e., Verilog-2005. --strict Disable VL extensions to Verilog. -m,--mem=GB How much memory to try to use. Default: 4 GB. Raising this may improve performance by avoiding garbage collection. To avoid swapping, keep this below (physical_memory - 2 GB). "