review: add ELF block to denote unhandled option

Author: inbelic

llvm/include/llvm/ObjCopy/ConfigManager.h

@@ -27,7 +27,7 @@ struct LLVM_ABI ConfigManager : public MultiFormatConfig {
 
   const CommonConfig &getCommonConfig() const override { return Common; }
 
-  Expected<const ELFConfig &> getELFConfig() const override { return ELF; }
+  Expected<const ELFConfig &> getELFConfig() const override;
 
   Expected<const COFFConfig &> getCOFFConfig() const override;
 

llvm/lib/ObjCopy/ConfigManager.cpp

@@ -13,6 +13,13 @@
 using namespace llvm;
 using namespace llvm::objcopy;
 
+Expected<const ELFConfig &> ConfigManager::getELFConfig() const {
+  if (!Common.ExtractSection.empty())
+    return createStringError(llvm::errc::invalid_argument,
+                             "option is not supported for ELF");
+  return ELF;
+}
+
 Expected<const COFFConfig &> ConfigManager::getCOFFConfig() const {
   if (!Common.SplitDWO.empty() || !Common.SymbolsPrefix.empty() ||
       !Common.SymbolsPrefixRemove.empty() || !Common.SymbolsToSkip.empty() ||