[llvm] [llvm] Disable some LLVM arguments in runtimes mode (PR #73031)

[Johannes Doerfert via llvm-commits]

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@@ -151,6 +151,9 @@ endif()
 # Avoid checking whether the compiler is working.
 set(LLVM_COMPILER_CHECKED ON)
 
+# This can be used to detect whether we're in the runtimes build.
+set(LLVM_RUNTIMES_BUILD ON)
+
 # Handle common options used by all runtimes.
 include(AddLLVM)
 include(HandleLLVMOptions)
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jdoerfert wrote:

FWIW, I think this is the right way to go. We'll handle the fallout as it shows up.

https://github.com/llvm/llvm-project/pull/73031