Collection of different cross-compiling instructions and experiences, mostly for scientific packages and targetting embedded hardware. This aims to collect the information I did not now, when I worked on these projects during research.

Projects done so far:

• fully static build of GNU GSL (https://www.gnu.org/software/gsl/) for embedded usage
• build of acados (https://github.com/acados/acados) for embedded usage
• build of blasfeo (https://github.com/giaf/blasfeo) and hpipm (https://github.com/giaf/hpipm) for embedded usage

Targetted microcontrollers so far:

• STM32-H7 series (ARM Cortex-M7), bare-metal
• Xilinx Zynq7000 series (ARM Cortex-A9), bare-metal

ARM provides pre-built binaries of (cross-)compilers for the most relevant use cases, called the GNU ARM Embedded Toolchain https://developer.arm.com/downloads/-/gnu-rm. So, whenever compiling a library, one does not have to search for the hidden gcc, the microcontroller's IDE brings, but can fall back to the GNU ARM compilers. Most of the time, this eases development, avoiding the need of cygwin or similar alternatives... Just use a (virtual) Linux.