CODING_CONVENTIONS.md: Elaborate on C11 compliance #21140
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This adds reasoning for requiring standard compliant C code, and lists generally accepted exceptions to this rule.
maribu
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Jan 19, 2025
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| - `__attribute__((used))`, `__attribute__((section("...")))`, | ||
| `__attribute__((weak))`, and `__attribute__((alias("...")))` |
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Notably missing but used in the code base:
__attribute__((always_inline)): This should be IMO a wrapper incompiler_hints.h. A compiler not supporting this will generate less efficient code (assuming this is actually sensibly used), but correct code, if this is ignored__attribute__((align(N)))/attribute((aligned(N))): There is now<stdalign.h>that providesalignas()and the_Alignas()` since C11, so no need to use an extension for this.
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Contribution description
This adds reasoning for requiring standard compliant C code, and lists generally accepted exceptions to this rule.
Testing procedure
Read the changes and reasoning.
Issues/PRs references
https://forum.riot-os.org/t/notes-virtual-maintainer-assembly-vma-2024-11/4428