Monthly Archives: November 2007

Technology

Better Photos From An Angle!

Stockholm from above at a 45 degrees angleWe’ve been spoiled by nice photos from above from services like Google Maps, but here in Sweden that service never really even got close to match what Hitta.se and Eniro have offered. Google’s service is and always have been too US-centric for us Swedes.

I’ve considered Hitta to be the Swedish leader in this race, with their street level photos of buildings for addresses you search for etc, but now it seems Eniro has taken this one step further up the ladder as now they no longer only provide very detailed photos taken from above, they now also offer very cool photos taken from a 45 degrees angle!

Also, it seems the new “utsikt” photos (which translates to “view” in English) are taken closer to the ground as I can view my own house and neighborhood even closer using this service. The only downside with this service is that it is painfully slow. I can see that I get very slow transfers and my computer is idling so it can’t be much else than underpowered servers in their end!

Rockbox

Free-to-use compiler from TI

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Texas InstrumentsTexas Instruments finally decided to release free-to-use versions for Linux of their C/C++ compiler for the c54x DSP series (for open source projects at least).

This DSP is found in TI’s TMS320 family (dreaded chips, known mostly in our communities for their total lack of public docs).

Rockbox tinyIn Rockbox terms, this exciting news opens up the possibility for easier coding for the targets that use the DM320 series, which currently is the Olympus M:Robe 500 but may include other players in the future.

For your convenience, here’s a link to the actual TI license and the 12MB tarball (hosted on my site). The tarball contains a binary that installs 86 files occupying 31MB.

The compiler and more details can be found in the Neuros blog.

cURL and libcurl, Rockbox

Human Connections

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LinkedIn logoFor fun, I created two “groups” on LinkedIn for two of the open source projects I’m perhaps the most active in. I’m not quite sure what benefit and good use we’ll get from them, but anyway they’re created and if you feel in any way related to Rockbox or curl, here are the links you can use to do a join request:

Rockbox tiny Rockbox: http://www.linkedin.com/e/gis/42081/49AF807A7908

curl tiny cURL: http://www.linkedin.com/e/gis/42082/362F5916AFF1

And a link to my public LinkedIn profile…

Open Source

c-ares and me

I’ve said this a few times on the c-ares mailing list, but I guess that just doesn’t reach very many people outside the very closest “family” so I decided I’d mention a blurb here. (I don’t think this reaches very many people either, but quite possibly at least a few others…)

Background

A couple of years ago, I wanted to introduce asynchronous name resolving to libcurl to better allow many simultaneous requests still being single-threaded. This venture started with me and Bjorn Reese starting the Denise project that would do exactly this. We found no proper existing alternatives with a suitable license so we started our own.

Then someone mentioned that ares is almost exactly what Denise was meant to become and it had a fine license. I immediately jumped the Denise idea and went with ares. Soon enough we found out that ares needed improvements and tweaks, and its original author didn’t seem interested in incorporation those into ares… so I created a fork named c-ares.

c-ares has since then been used by libcurl and it has been bug-fixed and improved by a bunch of skilled hackers and it works solidly and reliably. It has also been discovered and incorporated into a bunch of other softwares, including UnreadlIRCd, BZFlag, Hobbit network monitor, libevnet, Tor, gLite, aria2, sipsak, Second Life and more…

Today

I don’t normally work with any of my open source projects in my full-time job, so I need to distribute my spare time on the various projects. When my spare time gets limited, I need to cut down on the projects that I deem is least interesting or perhaps least in need of attention (from me). Recently, it has been obvious that c-ares is one of them projects that I rarely have time and energy left for at the end of the day.

Caretaker

I have no plans to “jump ship” or to abandon the project in any way, but I think it would be beneficial for the c-ares project if someone would step forward and if not “take over” the project, at least join in and help share the burden with patch applying, source code reviewing, do design decisions, reply to mailing list questions etc.

There’s no crisis, there’s no hurry, but the project won’t move forward very fast as the situation currently is.

cURL and libcurl

Fresh CA Cert Bundle Anyone?

cURLThe popular ca extract service on the curl web site converts the Firefox ca certs into a PEM file suitable for use with curl, wget or anything else OpenSSL-based that likes PEM formatted CA cert bundles.

The main script was fixed yesterday as it was previously getting a nightly source code snapshot to get the “magic” file to convert from, but I noticed they stopped updating the nightly source snapshots a good while ago so the updates had stopped!

Now, the script only gets the actually needed certdata file and converts it, so now it downloads a lot less data in vain and it also thus runs much faster. Now the PEM files offered on that page are up-to-date with the most recent Firefox.

Rockbox

Distributed Builds on Every Commit

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Rockbox

I’m not sure everyone out there has yet realized what a cool build system we’ve created in the Rockbox project!

We’re using Subversion for source code version control. We have a master server that detects whenever there has been a commit and it then starts one thread for each known build server, where each thread connects to the remote server, asks it to update to a specific rev number and then asks the server to build for a particular target.

When the build is done, the master copies the build log and in some cases also the final zip file (which is then offered for download to users). At the time of this writing, we have 67 different builds and we average on 15 build servers. The master adapts to the servers that respond and just ignores the ones that don’t.

This has the cool outcome that roughly 5 – 7 minutes after a commit, there are zip files offered on the site with the absolutely latest code for 27 different players! There’s also a huge table presented on the site with the results from all builds so that warnings and build errors can be worked on.

Of course the master then goes back to check for commits again and the whole thing starts all over again.

Just now, the build for the Olympus M:Robe 500 was modified to depend on a recent ARM tool chain patch so we need to get all build server admins to update their ARM compilers!

The build servers are of course “donated” to the cause by volunteers. It is a fairly easy way to help out the project, if you have the sufficient bandwidth and machine. You can help too!

libssh2

libssh2 0.18

I stole some time from my family this weekend and I managed to put together and released a fresh libssh2 tarball, labeled 0.18.

I’m not really too fond of spending a lot of time with a sub-zero version number, but the recent releases have felt like just minor improvements to the previous so bumping up to 1.0 has a certain mental brake all over it. I guess I need to just ignore the brake and take the plunge soon, as I believe it’ll make users more likely to start actually using the lib and that will be good.