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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@LaplaceG
Hi,
You guys probably know this already, but I'm just posting the update for further reference if anyone else runs into the same problem. The Undefined reference to `_etext' is because _etext is being used directly from jswrap_process.c here:
extern int LINKER_ETEXT_VAR; // end of flash text (binary) section. This define is located in platform_config.h produced by build_platform_config.py.The reason for the mismatch is that the EFM32 linker (and startup-file) defines this variable as __etext (notice two underscores). So after updating the build_platform_config.py to use this name instead for the LINKER_ETEXT_VAR it's all good.
The other undefined references to _sbrk and _exit was solved by adding
-Wl,--start-group -lgcc -lc -lnosys -Wl,--end-groupto the linker options for the EFM32.