[libc-commits] [libc] [libc] Add backup definition for LONG_WIDTH in limits-macros.h. (PR #79375)

[Nick Desaulniers via libc-commits]

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@@ -69,8 +69,8 @@
 #define LONG_WIDTH __LONG_WIDTH__
 #elif defined(__WORDSIZE)
 #define LONG_WIDTH __WORDSIZE
-#else
-#error "Unknown WORDSIZE to define LONG_WIDTH."
+#else // use sizeof(long) * CHAR_BIT as backup.
+#define LONG_WIDTH (sizeof(long) * CHAR_BIT)
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nickdesaulniers wrote:

clang-14 is the first release to define `__LONG_WIDTH__`.

https://github.com/llvm/llvm-project/pull/79375