[libc-commits] [libc] [libc] Provide isnan, isnanf and isnanl functions (PR #96008)

[Joseph Huber via libc-commits]

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@@ -17,4 +17,6 @@
 
 %%public_api()
 
+#define isnan(x) __builtin_isnan(x)
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jhuber6 wrote:

Do we expect every consumer of this header to have this builtin? We could possible do `if defined(__has_builtin) && __has_builtin(__builtin_isnan))` or omething.

https://github.com/llvm/llvm-project/pull/96008