Usually I do not have to cope with OSX. But today I had to and Apple's dylib policy drove me crazy (especially when there are many dylibs with absolute paths to their dependencies). The blogpost that saved the day for me introduced the handy tool install_name_tool. Calling with the -id switch, you can change the install name of the target. When used with the -change switch, install_name_tool will change the path to the dependency according to your settings (paths preferably relative!).
I wrote this post in case I ever have to deal with OSX again. Knowing that makes life a lot easier.
Thursday, July 25, 2013
Saturday, July 20, 2013
blog recommendation
Whoever is interested in C++ should have a look at http://herbsutter.com/. Amongst other occupations Herb Sutter used to be a chair of the ISO C++ standards comittee. That qualifies him to produce interesting and informative posts on C++, especially with regard to standard C++.
For me the section Guru of the Week is particularly useful. Every week there's a C++ problem (not a specific implementation task, but general questions regarding standard C++) that you can try to solve yourself. If you need a hint or are just interested in the solution, there is always an exhaustive answer. The problems are being updated to match C++14, therefore many problems are currently offline for revision. However, until they are back again, I recommend having a peek at the remaining ones.
For me the section Guru of the Week is particularly useful. Every week there's a C++ problem (not a specific implementation task, but general questions regarding standard C++) that you can try to solve yourself. If you need a hint or are just interested in the solution, there is always an exhaustive answer. The problems are being updated to match C++14, therefore many problems are currently offline for revision. However, until they are back again, I recommend having a peek at the remaining ones.
Thursday, July 11, 2013
Disable CPU throttling in Debian (aptosid)
When building ATLAS you cannot have CPU throttling enabled:
"CPU Throttling apparently enabled! It appears you have cpu throttling enabled, which makes timings unreliable and an ATLAS install nonsensical. Aborting. "
Disabling throttling is just a single command (for each cpu):
Where CPU denotes the cpu index (0 through 7 in my case). If you do not have cpufreq-set, you can get it from the package cpufrequtils.
"CPU Throttling apparently enabled! It appears you have cpu throttling enabled, which makes timings unreliable and an ATLAS install nonsensical. Aborting. "
Disabling throttling is just a single command (for each cpu):
cpufreq-set -g performance -c <CPU>
Where CPU denotes the cpu index (0 through 7 in my case). If you do not have cpufreq-set, you can get it from the package cpufrequtils.
Wednesday, July 3, 2013
online UML diagrams
yuml is a website that allows you to draw UML diagrams online. You can export your diagrams to various formats, such as svg, png, json.
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| sample diagram generated using yuml |
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