[llvm] [MC][CodeGen] Add --large-eh-encoding flag for x86_64 ELF (PR #174508)

[Farid Zakaria via llvm-commits]

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@@ -182,6 +183,14 @@ llvm::mc::RegisterMCTargetOptionsFlags::RegisterMCTargetOptionsFlags() {
                      "Never use section symbols")));
   MCBINDOPT(RelocSectionSym);
 
+  static cl::opt<bool> LargeEHEncoding(
+      "large-eh-encoding",
+      cl::desc("Use 8-byte pointer size for all x86_64 ELF EH encodings "
+               "(FDE, personality, LSDA, TType) to avoid relocation "
+               "overflows in large binaries"),
+      cl::init(false));
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fzakaria wrote:

done.

https://github.com/llvm/llvm-project/pull/174508