[libc-commits] [libc] [libc] Fix missing default value for errno config (PR #100175)

[via libc-commits]

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@@ -23,7 +25,8 @@
 // fullbuild mode, effectively the same as `LIBC_ERRNO_MODE_EXTERNAL`.
 #define LIBC_ERRNO_MODE_SYSTEM 5
 
-#ifndef LIBC_ERRNO_MODE
+#if !defined(LIBC_ERRNO_MODE) || LIBC_ERRNO_MODE == LIBC_ERRNO_MODE_DEFAULT
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lntue wrote:

Can you add `LIBC_ERRNO_MODE_DEFAULT` to the `#error` message below?

https://github.com/llvm/llvm-project/pull/100175