I've been a big fan of crosstool-ng ever since I found out that Dan Kegal's crosstool scripts idea was being continued. I picked up one of these boards, an Olimex STM32-H103 , because I'm putting together a custom PCB with an STM32F103 on it and didn't want to be bringing up the toolchain at the same time as debugging the hardware. Starting with this board means starting with a known working STM32F103 board. Steps - Install 'gcc-multilib' package. If you don't have this you'll get some odd errors when building the toolchain such as: [INFO ] ================================================================= [INFO ] Installing binutils for host [INFO ] Installing binutils for host: done in 142.17s (at 11:46) [INFO ] ================================================================= [INFO ] Installing pass-1 core C compiler [ERROR] checking dynamic linker characteristics... checking whether getchar_unlocked is declared... configure: er...