[lld] [ELF] Support relocatable files using CREL (PR #98115)

[Fangrui Song via llvm-commits]

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@@ -592,6 +608,113 @@ static void finalizeShtGroup(OutputSection *os, InputSection *section) {
   os->size = (1 + seen.size()) * sizeof(uint32_t);
 }
 
+template <class uint>
+LLVM_ATTRIBUTE_ALWAYS_INLINE static void
+encodeOneCrel(raw_svector_ostream &os, uint &outOffset, uint32_t &outSymidx,
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MaskRay wrote:

Thanks for the suggestion. Adopted `Elf_Crel<is64> &out`

https://github.com/llvm/llvm-project/pull/98115