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Don't use Clang nullability qualifiers in strict ISO C mode #3074

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Merged
soutaro merged 1 commit into from
Aug 10, 2026
Merged

Don't use Clang nullability qualifiers in strict ISO C mode #3074

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7 changes: 6 additions & 1 deletion include/rbs/defines.h
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Original file line number Diff line number Diff line change
Expand Up @@ -87,8 +87,13 @@
* Nullability annotations for pointer types.
* Clang supports _Nullable and _Nonnull to indicate whether a pointer may be NULL.
* On other compilers, these expand to nothing.
*
* They are Clang extensions, so a strict ISO C compilation rejects them with
* `-Wnullability-extension`, which is an error under `-pedantic-errors`. Expand
* them to nothing in that case, so that embedders compiling these headers with a
* conforming dialect (`-std=c99` and friends define `__STRICT_ANSI__`) still build.
*/
#ifdef __clang__
#if defined(__clang__) && !defined(__STRICT_ANSI__)
#define RBS_NULLABLE _Nullable
#define RBS_NONNULL _Nonnull
#else
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