[clang] [C23] Add *_NORM_MAX macros to <float.h> (PR #96643)

[Aaron Ballman via cfe-commits]

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@@ -207,6 +211,23 @@
     #error "Mandatory macros {FLT,DBL,LDBL}_MAX_10_EXP are invalid."
 #endif
 
+#if __STDC_VERSION__ >= 202311L || !defined(__STRICT_ANSI__)
+#ifndef FLT_NORM_MAX
+  #error "Mandatory macro FLT_NORM_MAX is missing."
+#else
+  _Static_assert(FLT_NORM_MAX >= 1.0E+37F, "Mandatory macro FLT_NORM_MAX is invalid.");
+#endif
+#ifndef DBL_NORM_MAX
+  #error "Mandatory macro DBL_NORM_MAX is missing."
+#else
+  _Static_assert(DBL_NORM_MAX >= 1.0E+37F, "Mandatory macro DBL_NORM_MAX is invalid.");
+#endif
+#ifndef LDBL_NORM_MAX
+  #error "Mandatory macro LDBL_NORM_MAX is missing."
+#else
+  _Static_assert(LDBL_NORM_MAX >= 1.0E+37F, "Mandatory macro LDBL_NORM_MAX is invalid.");
+#endif
+#endif
 
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AaronBallman wrote:

Oops, no, that's copy pasta from me, good catch! I'll correct that.

https://github.com/llvm/llvm-project/pull/96643