MicroPython Forum (Archive)

Turns out the platform I'm porting micropython for does not provide alloca.h. I did some research and best reference I could find was this one ftp://ftp.dante.de/tex-archive/fonts/utilities/ps2mf/alloca.c (the only change I made was to use malloc instead of xmalloc.) Any chance that is going to work?

No, it's of course the opposite - selected platforms have optimized assembly implementation...

That's (of course) what I meant.

They all became empty when MICROPY_NLR_SETJMP is defined. My tool chain was not being able to properly preprocess .S files and thus defining MICROPY_NLR_SETJMP was not doing the trick. Do you think it make sense to modify py.mk to only compile nlr*.S if MICROPY_NLR_SETJMP is not defined? What I mean...

I'm port micropy to a platform which "requires" Keil's ARM toolchain. I'd like to avoid assembly code if possible (let's say I have reasons for that). Apparently, one can acoid assembly code by defining MICROPY_NLR_SETJMP (which will use setjmp/longjmp instead). However, PY_O_BASENAME still lists nl...

Did you derived from an existing port (eg bare-arm)? If yes, which one? Did you use --translate_gcc and --translate_gld? Did you publish your code somewhere? I'm targeting arm920t, big endian mode. I used the --translate_gcc plus -Warm,--c99,--gnu according to ARM documentation. I'm having trouble w...

Yes, same error messages. I'm using cygwin's gcc 5.2.0.

So, the recommendation is to turnoff libffi on windows?

I believe I do have libffi installed on my cygwin environment. Still, I'm getting same error messages.

What's the main consequence of turning libffi off?

Done: https://github.com/micropython/micropython/pull/1632

Got it. Just tried using unix port. I set MICROPY_PY_FFI=0 so it ignores the lack of libffi. Now assembler complains: ../py/nlrx86.S: Assembler messages: ../py/nlrx86.S:56: Warning: .type pseudo-op used outside of .def/.endef ignored. ../py/nlrx86.S:56: Error: junk at end of line, first unrecognized...

I went through the code but I could not quite understand how non-GC mode (MICROPY_ENABLE_GC = 0) works.

What are the main advantages of enabling/disabling GC?