RIOT-OS
core: add stdio.h to replace stdout functions with stdio_null
Contribution description
So far stdio_null would just drop the stdio backend, all the expensive stdio formatting functions were still included.
This PR replaces all calls to printf() and friends with a no-op.
Testing procedure
Build e.g. tests/minimal which uses stdio_null:
master
text data bss dec hex filename
9256 108 1312 10676 29b4 /home/benpicco/dev/RIOT-2/tests/minimal/bin/same54-xpro/tests_minimal.elf
this PR
text data bss dec hex filename
5140 108 1312 6560 19a0 /home/benpicco/dev/RIOT/tests/minimal/bin/same54-xpro/tests_minimal.elf
Issues/PRs references
Murdock results
:heavy_check_mark: PASSED
f840d80473f22d76f41158e771bec5c67f9c9e56 cpu/avr8_common: don't implement perror() with stdio_null
| Success | Failures | Total | Runtime |
|---|---|---|---|
| 10287 | 0 | 10287 | 11m:53s |
Artifacts
How do we proceed here?
In the last VMA, there was agreement on using #include_next, so I guess this is good to proceed. According to the notes, @maribu volunteered to open a PR reflecting the discussion in the coding convention, that is still pending, afaict.
Thx for the reminder; here is the PR: https://github.com/RIOT-OS/RIOT/pull/21140
With the feature freeze past, #21140 in and one approval present, I think we can go on and merge.