Hdlmake generates multi-purpose makefiles for HDL projects management. It supports synthesis, simulation, fetching module dependencies from repositories, creating project for multiple FPGA toolchains... All of this can be done with a makefile command or with Hdlmake directly. It supports modularity, scalability, use of revision control systems and code reuse. Hdlmake is free, open and distributed under the GPL license.


Supported Tools

Tool Synthesis Simulation
Xilinx ISE Yes n.a.
Xilinx PlanAhead Yes n.a.
Xilinx Vivado Yes Yes
Altera Quartus Yes n.a.
Microsemi (Actel) Libero Yes n.a.
Lattice Semi. Diamond Yes n.a.
Project IceStorm Verilog n.a.
Xilinx ISim Yes n.a.
Mentor Graphics Modelsim n.a. Yes
Mentor Graphics Questa n.a. Yes
Aldec Active-HDL n.a. Yes
Aldec Riviera-PRO n.a. Yes
Icarus Verilog n.a. Yes

Supported Operating Systems

Operating System Comments
Linux tested on Ubuntu Precise/Trusty/Xenial, CentOS 6/7
Windows tested on Windows 7/8/8.1/10 for CMD and PowerShell

Supported Python Version

Version Comments
Python 2 Runs on 2.7
Python 3 Runs on 3.x


Hdlmake docs are written by using Sphinx and hosted in Read the docs in order to allow an agile managament for the documentation related with the different code branches and releases.

Previous Releases


ISYP is the name of the original hdlmake release written by Pawel Szostek. Most of the HDL projects hosted in the Open Hardware Repository rely on this stable version, so you can find more info about it via the following links:

In order to migrate an old HDLMake project to the new version, you should check the following guidelines:


Commercial Support

  • GL Research provides commercial consulting and trainig services for advanced hdlmake use cases.

General Questions


Date Event
16-08-2010 Project creation
05-05-2013 Version 1.0 published (A.K.A. ISYP), featuring support for Xilinx ISE synthesis and Mentor Modelsim simulation
03-04-2014 Custom version 1.1, crafted under GSI requirements and supporting Altera Quartus designs
09-10-2014 Version 2.0 published and introduced at the 8th White Rabbit workshop. Aimed to provide multi-tool support
28-03-2015 Version 2.1 published, featuring incremental improvements over the previous release
19-09-2016 Developer beta for version 3.0 released for user input driven debugging
26-05-2017 Version 3.0 published, featuring native Windows shell and Python 2.7 / 3.x support

Javier Garcia-Lasheras - May 2017