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docs: why it didnt work without -march

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cscherr 2025-07-14 15:52:00 +02:00
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crates/algorithms/algorithms-c/README.md
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@ -22,3 +22,5 @@ CC=arm-none-eabi-gcc AR=arm-none-eabi-ar ceedling release
# compile for this computer # compile for this computer
CC=gcc AR=ar ceedling release CC=gcc AR=ar ceedling release
``` ```
It is also critically important to define the `-march=ARCH` option when using `arm-none-eabi-gcc`, since the compiler will otherwise just assume a target architecture. In this case, it needs to be set to `armv6-m`, since the MPU is a `cortex-M0+`. This MPU does only support the thumb instructionset, not the ARM32 set.