Thanks Fedex, just got my shiny Odroid-U3 delivered from Korea :-D For those who don't know, it's a small developer board like the RaspberryPI (leave now if you don't even know the RaspberryPI! ;-)) with an ARM CPU. Actually 4x 1.7GHz Samsung Exynos 4412 ARM Cortex-A9 processor ...

So since I run some old/slow hardware, I want to get the max out of them, speedwise, without upgrading anything on the hardware side. So one of the things I do is to re-compile the applications/libraries with some customized CFlags. CFlags allow you to instruct your compiler (GCC ...