GNU Tools Cauldron 2016

<< GNU Tools Cauldron 2015


Organizing committee:


Slides and Notes

The videos, slides and any notes for all recorded presentations will be available after the Cauldron ends.

Mailing lists

  1. Abstract submissions, registration, administrivia questions:

  2. Announcements and discussions related to the conference: .

Workshop description

We are pleased to announce another gathering of GNU tools developers. The basic format of this meeting will be similar to the previous meetings.

The purpose of this workshop is to gather all GNU tools developers, discuss current/future work, coordinate efforts, exchange reports on ongoing efforts, discuss development plans for the next 12 months, developer tutorials and any other related discussions.

This time, the GNU Tools Cauldron will form the closing weekend of the Wuthering Bytes technology festival in Hebden Bridge in the UK. Situated at the heart of the UK's "Northern Powerhouse", Hebden Bridge is roughly equidistant from Liverpool, Manchester, Sheffield, Leeds and Bradford. The Wuthering Bytes festival is a 10 day celebration of all things technological that are free and open source.

We are inviting every developer working in the GNU toolchain: GCC, GDB, binutils, runtimes, etc. In addition to discussion topics selected at the conference, we are looking for advance submissions.

If you have a topic that you would like to present, please submit an abstract describing what you plan to present. We are accepting three types of submissions:

Note that we will not be doing in-depth reviews of the presentations. Mainly we are looking for applicability and to decide scheduling. There will be time at the conference to add other topics of discussion, similarly to what we did at the previous meetings.

To register your abstract, send e-mail to .

Your submission should contain the following information:

If you intend to participate, but not necessarily present, please let us know as well. Send a message to stating your intent to participate. Please indicate your affiliation, dietary requirements and t-shirt size.

Outline Schedule

All events are at Hebden Bridge Town Hall, except where indicated.


Abstracts will be added here as they are submitted.





Hebden Bridge Town Hall (main venue)

Hebden Bridge Town Hall

The Town Hall is in the centre of Hebden Bridge and in recent years it was extended significantly, adding modern business facilities, while retaining grade 2 listed features in the original part of the building that date back to 1897. We shall be making use of its three major public meeting rooms to provide two tracks of talks and a breakout room.

The Town Hall also has its own cafe/restaurant, and a piazza overlooking the river.

Full fibre network connectivity is available for all meeting participants.

The Birchcliffe Centre (Cauldron dinner venue)

The front of the Birchcliffe Centre

A converted Baptist church, the Birchcliffe Centre, offers an ideal venue for the Cauldron dinner.

We plan a buffet feast of regional foods, which will be accompanied by beverages from local brewers and vineyards (yes - they really exist in Yorkshire).

Birchcliffe Centre main hall

About Hebden Bridge

Hebden Bridge is a picturesque market town located in the North of England, in the foothills of the Pennines. It has a rich industrial and cultural heritage, having played an important part during the industrial revolution and being located nearby to the birthplace of the cooperative movement. Ted Hughes — who served as Poet Laureate from 1984 until his death — was born on the outskirts of the town and drew much inspiration from the local area. In more recent years it has gone on to become home to many artists and other creatives

It has also been suggested that Hebden Bridge is perfectly located to play the part of Britain's 2nd city, or rather the centre of an inverted super-city with a "greenbelt centre and suburbs called Manchester, Leeds and Liverpool." (BBC,Guardian).

Hebden Bridge has its own hackerspace, Bridge Rectifier, and if there are going to be a few people in town outside of the main Cauldron days, it may be possible to arrange access and/or some sort of social or other informal event. Suggestions are welcomed



By Air

Hebden Bridge is served by both Manchester International and Leeds/Bradford airports. Transfer time by train from both is approximately 1.75 hours.

Public Transport

Hebden Bridge station is about half a mile from the centre of town and is well served by trains from Leeds and Manchester and thence to London and all major UK destinations. For timetables and travel planning see National Rail Enquiries.


A number of taxi companies serve Hebden Bridge. You are advised to call in advance if you wish to be met at the station.

Getting around Hebden Bridge

The town is quite small, so walking is the usual mode of transport. However much of the terrain is very hilly, so be prepared for some exertion. This is particularly true when walking from the main venue, the Town Hall, to the Birchcliffe Centre.


Hebden Bridge is a small historic market town, so you won't find the major hotel chains there, but there are smaller hotels, along together with plenty of B&B and self-catering accommodation.

Please note that you are advised to do your own research to ensure that accommodation lives up to your expectations.

Local hotels, B&Bs and self-catering

There are two main hotels in the town:

There are also well serviced self-catering apartments:

Plus many smaller B&Bs and self-catering options available, details of which can be found via:

Hebden Bridge Hostel

Adjacent to the Birchcliffe Centre, the hostel provides very low cost rooms, both individual and shared. It does fill up quickly, so ensure you book well in advance.

Larger hotels (Halifax)

Larger hotels can be found in the much larger neighbouring town of Halifax, 8 miles away. There is a regular train service to get to and from Hebden Bridge, or you can take a taxi.

Crossley's Cars are located close to the Travelodge and have quoted a fare of £12-13 for a taxi to Hebden Bridge Town Hall.


The UK is generally temperate, but well known for the variability of its weather. While September can often be pleasantly warm, it can also serve up autumn gales and rain.

Wuthering Bytes

Wuthering Bytes is an annual technology festival, with events that run as part of it covering a broad range of topics, but with open source and participation being common themes. Since starting in 2013 the festival has grown in size year-on-year and 2016 promises to be the largest yet.

Festival Day (September 2)

The festival will get off to a start on Friday 2nd September and a day filled with talks covering a diverse range of topics, with a particular focus on inspirational stories and unique insights, while looking to both the history and the future of technology. Talks from previous years include:

Open Source Hardware Camp (September 3-4)

OSHCamp is the annual conference of the Open Source Hardware User Group and will be in its sixth year, typically featuring around 12 talks on the Saturday and 6 workshops on the Sunday. Topics covered in previous years include open hardware licensing, simulating and benchmarking the Adapteva Parallella board, from idea to finished product, building a maker business, and developing Linux on embedded devices.

Cauldron delegates are also invited to submit proposals for talks and workshops.

Open for Business (September 5)

This free one day conference is hosted by the BCS Open Source Group (OSSG) and aims to help anyone with or working at, an open source business, along with those who may be thinking of starting an open source business. There will be presentations that provide insights into first-hand experiences at companies ranging from micro to global in scale, together with talks that look at the economics and legal considerations, exploring open source business models and contracts.

This will be the 2nd year that Open for Business has been run and the video from 2015 is available online.


Other events running as part of Wuthering Bytes 2016 TBC.



There is much excellent walking to be had in almost very direction, with Hebden Bridge making an excellent base for novice and more adventurous walkers alike.


Hebden Bridge is less than 10 miles from the village of Haworth, where the Bronte Sisters spent most of their lives — the Bronte Parsonage is now a museum — and wrote their famous novels, as well as being one of the main stations on heritage steam railway, the Keighley & Worth Valley Railway. Hebden Bridge to Haworth is served by the 500 bus. For walkers with suitable all weather clothing, moderate experience and a day to spare, there are extremely picturesque routes across the moors from Hebden Bridge to Haworth.

20 miles+

The Museum of Science and Industry at Manchester is well worth a visit.

Hebden Bridge is also about 20 miles south of one of the UK's most starkly scenic regions, the Yorkshire Dales.