Re: [avr-libc-dev] fwrite() not working as expected

[Georg-Johann Lay]

address@hidden schrieb:
> Hi,
> I am trying to use fwrite() to write the first X bytes of a string like
> this, but with a wrong output:
>
> auto ret = fwrite("Hello World!", 1, 5, stdout);
> printf("%d\n", ret);
> // Output: H0
>
> Its documented here:
> https://www.nongnu.org/avr-libc/user-manual/group__avr__stdio.html#gadd5777719a41713629a62b68c239a774
>
> Can anyone please tell me if this is a bug or if I am doing something
> wrong. I am using avr-libc 2.0.0 on Arch Linux with the latest avr-gcc 7.3.0
>
> ~Nico

How did you setup stdout? Using FDEV_SETUP_STREAM?
https://www.nongnu.org/avr-libc/user-manual/group__avr__stdio.html#gaea2b6be92ead4673bc487b271b7227fb

Are you sure the communication / output routines passed to stdout are 
correct and I/O correctly set up? Including host I/O, given you use it.

Johann