tldr/pages/common/ghdl.md

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# ghdl
> Open-source simulator for the VHDL language.
> More information: <http://ghdl.free.fr>.
- Analyze a VHDL source file and produce an object file:
`ghdl -a {{filename.vhdl}}`
- Elaborate a design (where `design` is the name of a configuration unit, entity unit or architecture unit):
`ghdl -e {{design}}`
- Run an elaborated design:
`ghdl -r {{design}}`
- Run an elaborated design and dump output to a waveform file:
`ghdl -r {{design}} --wave={{output.ghw}}`
- Check the syntax of a VHDL source file:
`ghdl -s {{filename.vhdl}}`
- Display the help page:
`ghdl --help`