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micropython / micropython

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
https://micropython.org
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Unable to compile natmod uzlib example #7233

Open br0kenpixel opened 3 years ago

br0kenpixel commented 3 years ago

When I try to compile the uzlib example I get the following error:

GEN build/uzlib_xtensawin.config.h
CC uzlib.c
LINK build/uzlib.o
LinkError: build/uzlib.o: undefined symbol: realloc
make: *** [build/uzlib_xtensawin.native.mpy] Error 1

I'm on MacOS 10.15.7 and using ESP-IDF v4.2

dpgeorge commented 3 years ago

There shouldn't be any calls to realloc, they should all go through m_realloc_dyn.

Can you provide a dump of uzlib.o via xtensa-esp32-elf-objdump -xd build/uzlib.o?

br0kenpixel commented 3 years ago

Sure thing. I attached the dump. dump.txt

dpgeorge commented 3 years ago

It looks like there is code included in your build for compression, which is not in this repo. Are you building uzlib from a clean version of this repo?

br0kenpixel commented 3 years ago

No. I actually modified it. I found another repo with a modified uzlib that supports compression. I didn't think it would affect building the natmod. I wanted to create .mpy of the modified uzlib module so if anyone needs compression support, then they could just download the .mpy file and import it into their code without having to download the source, apply the patches and build it.

jonnor commented 3 days ago

If the modified code acutally uses realloc, then you can provide a stub defintion of that file, which calls m_realloc_dyn (or similar) from the MicroPython library table.