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Finally trying the OpenSUSE build service

Finally trying the OpenSUSE build service

For the upcoming SIMtrace hardware (e.g. see the communication between SIM and Phone) I want to provide a patched Wireshark and packages for our host utilities to make the installation (and upgrading) very easy. Being a happy Ubuntu user I started with launchpad, trying to create my own wireshark package. It was very easy to get source of the wireshark package, add a patch, upload it to my ppa. Then I spent some hours figuring out that launchpad does not…

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OsmoST SIP (SIP in Smalltalk)

OsmoST SIP (SIP in Smalltalk)

Intro The last couple of days, to some degree weeks I was implementing a SIP stack for GNU Smalltalk to be used in my Smalltalk GSM project. The first time I encountered SIP was around 2001 when we were excited to run a SIP Phone on our Linux powered iPAQs (Linphone on Opie). For Smalltalk I started with looking at SipStack by Frank Shearar (who was very responsive to questions regarding his code and SIP in general). The main problem…

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Cross compiling Qt and dealing with teams

Cross compiling Qt and dealing with teams

Let me share some notes on how Embedded Linux programming can be, if you decide the war/pain is over. We do this by looking at the desktop build and then look at the tons of stuff that you need for embedded programming. Desktop $ pkg-config –cflags libpng12…$ qmake && make… Embedded$ . /usr/local/angstrom/arm/environment$ pkg-config –cflags libpng12..…$ qmake-qt4 && make Where is the difference?There is little, you just use a cross compiler. The GNU/Linux Toolchain is prepared for cross compilation, pkg-config…

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Going to the Qt Contributors’ Summit

Going to the Qt Contributors’ Summit

I will leave Reykjavik around midnight, arrive in the early morning in Berlin and then try to get to the venue. This means I will most likely miss the keynotes but should be there by lunch time. Besides being interested in technical topics like the networking stack, signals for Qt5, I think I will try to focus on the license part of the contribution model. With recent events like Lodys going after individual developers I wonder if there is something…

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Calligra Flow

Calligra Flow

Currently I am mostly working on (FreeSoftware) GSM networks, adding software probes, monitors, filtering and patching of certain messages. With any complex system this is spanning across multiple applications, multiple hosts. Because we collectively know that a picture is worth a thousand words my technical documentation should have a picture, showing the computers, their IPs, some details of how the messages flow and such. Doing this kind of work with Free Software is still a lot harder than it should…

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Collection of WebKit ports

Collection of WebKit ports

WebKit is a very successfull project. It is that in many ways. The code produced seems to very fast, the code is nice to work on, the people are great, the partys involved collaborate with each other in the interest of the project. The project is also very successfull in the mobile/smartphone space. All the major smartphone platforms but Windows7 are using WebKit. This all looks great, a big success but there is one thing that stands out. From all…

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Random notes on building Android

Random notes on building Android

This is mostly a note to myself. The easy way to build a profilable image for Android (e.g. Gingerbread). I am applying the patch from the bottom to build with framepointers. I am build an unstripped image, I use the environment script and then launch the emulator. With the default engineering mode opcontrol and oprofiled will be installed only the events will be missing from the image. $ make TARGET_STRIP_MODULE=false$ . ./build/envsetup.sh$ help$ setpaths$ ./out/host/linux-x86/bin/emulator diff –git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mkindex ae1997c..66e55fd…

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Switching back to Ubuntu/Debian from Fedora

Switching back to Ubuntu/Debian from Fedora

My initial reason to try Fedora Linux was that a lot of good things (glibc, SELinux, systemtap, gdb) are mostly developed by Red Hat and put into Fedora. So it felt natural to try Fedora Linux to see the state of things. Now after more than a year with Fedora I am back to Ubuntu/Debian. For some simple reasons: yum is ultra slow. When I try to search a package it decides to update the package database over the network,…

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Playing with a MSC over the A-link

Playing with a MSC over the A-link

One of the benefits of having a dynamic language like Smalltalk is that it becomes easier to experiment. For one of my current projects I am dealing with some simple USSD message handling and want to see how much load my application and the backend system can handle. Using the Smalltalk TestPhone this becomes quite easy. The first thing I do is to make up an Identity. This includes the IMSI and the AuKey (e.g. COMPv1 as found in libosmocore)…

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Tsunamies and other things

Tsunamies and other things

This is just some random thoughts after the news from Japan, hiking the Taroko National Park in Taiwan, driving with the stop train on the Coast Line in Taiwan, studying chinese, and being away from Computers for a day or two. My idea for the tsunami would be something like an instant balloon. In Taiwan every floor has an emergency exit through the window and a device to use to safely get to the ground, there is also the famous…

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