[libc] [llvm] [RFC][libc] Codify header inclusion policy (PR #87017)

[Nick Desaulniers via llvm-commits]

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@@ -43,6 +43,7 @@ function(_get_common_compile_options output_var flags)
     list(APPEND compile_options "-fpie")
 
     if(LLVM_LIBC_FULL_BUILD)
+      list(APPEND compile_options "-DLIBC_FULL_BUILD")
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nickdesaulniers wrote:

It's possibly still worth having this conversation, but the diff this thread is off of was made obsolete by #87598.  File a new bug if you'd like to discuss this more?

https://github.com/llvm/llvm-project/pull/87017