[libc-commits] [libc] [libc] Add backup definition for LONG_WIDTH in limits-macros.h. (PR #79375)
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Wed Jan 24 13:46:10 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libc
Author: None (lntue)
<details>
<summary>Changes</summary>
---
Full diff: https://github.com/llvm/llvm-project/pull/79375.diff
1 Files Affected:
- (modified) libc/include/llvm-libc-macros/limits-macros.h (+2-2)
``````````diff
diff --git a/libc/include/llvm-libc-macros/limits-macros.h b/libc/include/llvm-libc-macros/limits-macros.h
index fc21d1318a081b..1926bc25bcfa1d 100644
--- a/libc/include/llvm-libc-macros/limits-macros.h
+++ b/libc/include/llvm-libc-macros/limits-macros.h
@@ -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)
#endif // __LONG_WIDTH__
#endif // LONG_WIDTH
``````````
</details>
https://github.com/llvm/llvm-project/pull/79375
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