[lld] [lld][WebAssembly] Report Unsupported PIC Relocations as Errors (PR #104926)

[Luc Blaeser via llvm-commits]

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@@ -173,6 +173,22 @@ void scanRelocations(InputChunk *chunk) {
       }
     }
 
+    if (sym->isUndefined()) {
+      switch (reloc.Type) {
+      case R_WASM_TABLE_INDEX_REL_SLEB:
+      case R_WASM_TABLE_INDEX_REL_SLEB64:
+      case R_WASM_MEMORY_ADDR_REL_SLEB:
+      case R_WASM_MEMORY_ADDR_REL_SLEB64:
+        // These relocation types are only present in the code section and
+        // are not supported for undefined symbols. It would require replacing
+        // the constant by using a GOT global.
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luc-blaeser wrote:

Thanks. I improved the comment.

https://github.com/llvm/llvm-project/pull/104926