ghdl man page

ghdl — VHDL compiler/simulator

Synopsis

ghdl [command] [options] files...

Description

This manual page documents briefly the ghdl command. This manual page was written for user of man, but is not as complete as the reference documentation.

Instead, users should read the GHDL texinfo manual

Options

This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of the main modes and options is included below. For a complete description, refer to the GHDL texinfo manual.

Basic commands:

-a
Analysis, i.e. ghdl -a file.vhdl
-e
Elabortation, i.e. ghdl -e unit_name
-r
Run: run the simulation, i.e. ghdl -r unit_name
-s
Syntax-check, i.e. ghdl -s file.vhdl
--clean
Clean: remove generated files, i.e. ghdl --clean
-h, --help
Help, i.e. ghdl --help
--version
Version, i.e. ghdl --version

Basic options:

--work=NAME
Name of the WORK library, i.e. ghdl -a --work=foo foo.vhdl
--std=STD
Which VHDL standard (87|93|93c|00|02), i.e. ghdl -a --std=87 old.vhdl
--ieee=VER
Which IEEE library (none|standard|synopsys|mentor), i.e. ghdl -a --ieee=synopsys broken.vhdl
--no-vital-checks
Disable VITAL restriction checking, i.e. ghdl -a --no-vital-checks unsupported_vital.vhdl

There are many more modes and options; please consult the documentation.

Executables created by GHDL have addition simulation options. The most important ones are listed below:

--help
Show options for simulation and execution.
--assert-level=LEVEL
Assert level at which to stop simulation (none|note|warning|error|failure), i.e. ./touchy_design --assert-level=note
--stop-time=TIME
Stop simuation after TIME, i.e. ./design --stop-time=50ns
--vcd=FILENAME
Dump VCD to FILENAME (a waveform dump, viewable with--for instance--gtkwave), i.e. ./design --vcd=design.vcd
--sdf=[TYPE=]PATH=FILENAME
Back annotate SDF onto design using TYPE (min|typ|max), instance PATH, and SDF file FILENAME, i.e. ./sdf_design --sdf=typ=top/inst=inst.sdf

See Also

gtkwave (1)

The texinfo manual fully documents GHDL. You may also browse it at <http://ghdl.free.fr/ghdl/index.html>.

Author

This manual page was written by Wesley J. Landaker <wjl@icecavern.net>, for the Debian project (but may be used by others). It is released under the same terms as GHDL, i.e. the GNU General Public License. It was modified by Tristan Gingold to include it in the GHDL sources.

Info

Jun 24, 2006