[llvm] [llvm-nm] Introduce synthetic flag (PR #138232)

[James Henderson via llvm-commits]

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@@ -1783,6 +1785,55 @@ getDynamicSyms(SymbolicFile &Obj) {
   return E->getDynamicSymbolIterators();
 }
 
+// Returns false if there is error found or true otherwise.
+static bool getPltSyms(SymbolicFile &Obj, std::vector<NMSymbol> &SymbolList) {
+  const auto *ELFObj = dyn_cast<ELFObjectFileBase>(&Obj);
+  if (!ELFObj)
+    return true;
+
+  std::string Err;
+  Triple TT;
+  TT.setArch(ELFObj->getArch());
+  TT.setOS(ELFObj->getOS());
+  const Target *TheTarget = TargetRegistry::lookupTarget(TT, Err);
+  if (!TheTarget) {
+    error("unable to find target for " + Obj.getFileName() + ": " + Err);
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jh7370 wrote:

Could you give an example of what the full error message looks like, if e.g. you use llvm-nm built without X86_64 support with one that does support that target, please? I'd like to be sure the message isn't too clunky.

https://github.com/llvm/llvm-project/pull/138232