Index: ELF/Relocations.cpp
===================================================================
--- ELF/Relocations.cpp
+++ ELF/Relocations.cpp
@@ -557,6 +557,7 @@
     const RelTy &RI = *I;
     SymbolBody &Body = File.getRelocTargetSym(RI);
     uint32_t Type = RI.getType(Config->Mips64EL);
+    Body.IsRelocTarget = true;
 
     RelExpr Expr = Target->getRelExpr(Type, Body);
     bool Preemptible = isPreemptible(Body, Type);
Index: ELF/Symbols.h
===================================================================
--- ELF/Symbols.h
+++ ELF/Symbols.h
@@ -52,7 +52,7 @@
     LazyObjectKind,
   };
 
-  SymbolBody(Kind K) : SymbolKind(K) {}
+  SymbolBody(Kind K) : SymbolKind(K), IsRelocTarget(false) {}
 
   Symbol *symbol();
   const Symbol *symbol() const {
@@ -121,6 +121,9 @@
   // True if this symbol has an entry in the global part of MIPS GOT.
   unsigned IsInGlobalMipsGot : 1;
 
+  // True if the symbol is relocation target.
+  unsigned IsRelocTarget : 1;
+
   // The following fields have the same meaning as the ELF symbol attributes.
   uint8_t Type;    // symbol type
   uint8_t StOther; // st_other field value
Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -317,9 +317,10 @@
   std::string Msg = "undefined symbol: ";
   Msg += Config->Demangle ? demangle(Sym->getName()) : Sym->getName().str();
 
+  bool Unused = !Sym->IsRelocTarget && !Sym->symbol()->includeInDynsym();
   if (Sym->File)
     Msg += " in " + getFilename(Sym->File);
-  if (Config->UnresolvedSymbols == UnresolvedPolicy::Warn)
+  if (Config->UnresolvedSymbols == UnresolvedPolicy::Warn || Unused)
     warn(Msg);
   else
     error(Msg);
Index: test/ELF/libsearch.s
===================================================================
--- test/ELF/libsearch.s
+++ test/ELF/libsearch.s
@@ -16,7 +16,7 @@
 // NOLIBRARY: missing arg value for "-l", expected 1 argument.
 
 // Should not link because of undefined symbol _bar
-// RUN: not ld.lld -o %t3 %t.o 2>&1 \
+// RUN: ld.lld -o %t3 %t.o 2>&1 \
 // RUN:   | FileCheck --check-prefix=UNDEFINED %s
 // UNDEFINED: undefined symbol: _bar
 
Index: test/ELF/sysroot.s
===================================================================
--- test/ELF/sysroot.s
+++ test/ELF/sysroot.s
@@ -7,7 +7,7 @@
 // REQUIRES: x86
 
 // Should not link because of undefined symbol _bar
-// RUN: not ld.lld -o %t/r %t/m.o 2>&1 \
+// RUN: ld.lld -o %t/r %t/m.o 2>&1 \
 // RUN:     | FileCheck --check-prefix=UNDEFINED %s
 // UNDEFINED: undefined symbol: _bar