circuitpython/mpy-cross
David Lechner 115acadf92 mpy-cross: Disable stack check when building with Emscripten.
`mpy-cross` can be compiled to WASM using Emscripten, but it is not happy
unless the stack check is disabled.

Signed-off-by: David Lechner <david@pybricks.com>
2021-06-25 10:48:56 +10:00
..
.gitignore mpy-cross: Add new component, a cross compiler for MicroPython bytecode. 2016-02-25 10:12:21 +00:00
Makefile mpy-cross: Enable more warnings. 2020-10-22 11:54:11 +02:00
README.md mpy-cross/README.md: Add notes about -march and -O. 2019-12-09 14:23:04 +11:00
gccollect.c all: Factor gchelper code to one place and use it for unix & ARM ports. 2020-04-29 23:45:19 +10:00
main.c all: Rename BYTES_PER_WORD to MP_BYTES_PER_OBJ_WORD. 2021-02-04 22:46:42 +11:00
mpconfigport.h mpy-cross: Disable stack check when building with Emscripten. 2021-06-25 10:48:56 +10:00
mphalport.h mpy-cross: Make build independent of extmod directory. 2018-07-10 14:11:28 +10:00
mpy-cross.vcxproj all: Factor gchelper code to one place and use it for unix & ARM ports. 2020-04-29 23:45:19 +10:00
qstrdefsport.h mpy-cross: Add new component, a cross compiler for MicroPython bytecode. 2016-02-25 10:12:21 +00:00

README.md

MicroPython cross compiler

This directory contains the MicroPython cross compiler, which runs under any Unix-like system and compiles .py scripts into .mpy files.

Build it as usual:

$ make

The compiler is called mpy-cross. Invoke it as:

$ ./mpy-cross foo.py

This will create a file foo.mpy which can then be copied to a place accessible by the target MicroPython runtime (eg onto a pyboard's filesystem), and then imported like any other Python module using import foo.

Different target runtimes may require a different format of the compiled bytecode, and such options can be passed to the cross compiler. For example, the unix port of MicroPython requires the following:

$ ./mpy-cross -mcache-lookup-bc foo.py

If the Python code contains @native or @viper annotations, then you must specify -march to match the target architecture.

Run ./mpy-cross -h to get a full list of options.

The optimisation level is 0 by default. Optimisation levels are detailed in https://docs.micropython.org/en/latest/library/micropython.html#micropython.opt_level