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feat(libc): add support for fallthrough statement

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Modern C compilers warn about unannotated switch/case fallthrough code,
and require either a comment with some magic words, or an explicit
compiler attribute.
Since some TF-A static analysis CI check suggests having a "fallthrough;"
statement instead of a comment, introduce a macro that implements that
statement, and emits the proper compiler attribute.

Change-Id: Ib34e615fb48d0f4a340aabfad4472e08d5c70248
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Andre Przywara 2023-02-21 12:05:29 +00:00
parent 6437a09a2d
commit 023f1bed1d
1 changed files with 1 additions and 0 deletions

1
include/lib/libc/cdefs.h
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@ -15,6 +15,7 @@
#define __maybe_unused __attribute__((__unused__))
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
#define __fallthrough __attribute__((__fallthrough__))
#if RECLAIM_INIT_CODE
/*
* Add each function to a section that is unique so the functions can still