Configuring GCC with FreeRTOS and OpenOCD?

FreeRTOS is C source code, so like you say you would have to have some mechanism for linking C with your Pascal programs. Also, FreeRTOS relies on certain registers to be used for things like passing a parameter into a task (as a hypothetical example, the task might always expect the parameter to be in register R0) so you would have to ensure the ABI for the C compiler and the Pascal compiler was the same - or have your task entry in C then have it call a Pascal function (very nasty). Then there is the issue of interrupts, calling inline macros, etc.I would say this would be extremely difficult to achieve.

Both GNU Pascal and Free Pascal support linking to C (gcc) and ARM, as well as calling pascal code from C etc. Writing a header and declaring the prototypes with cdecl is all there is to it. Macros are a bit bigger problem. Usually I just rewrite them to inline functions (what they should have been anyway).

Except for the macro/header issue, the problems are more compiler specific functionality (which you also would have a problem with when porting from one C compiler to the next) If you prefer TP/Delphi dialect, Free Pascal is the better choice. I run my old Delphi code fine on my sheevaplug.

There is already an example for FreeRTOS/GCC/OpenOCD on a TI Cortex-M3 (was Luminary Micro Cortex-M3). Be aware though that this is a really old example and both the Eclipse and OpenOCD versions used are out of date. Although there is an Eclipse project provided, the project is configured as a standard make (as opposed to a managed make) project, so there is a standard makefile that can be just as easily executed from the command line as from within Eclipse.

http://www.freertos.org/portLM3Sxxxx_Eclipse.html.

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