diff --git a/llvm/docs/CommandGuide/llvm-libtool-darwin.rst b/llvm/docs/CommandGuide/llvm-libtool-darwin.rst
--- a/llvm/docs/CommandGuide/llvm-libtool-darwin.rst
+++ b/llvm/docs/CommandGuide/llvm-libtool-darwin.rst
@@ -68,6 +68,10 @@
 
    Do not warn about files that have no symbols.
 
+.. option:: -warnings_as_errors:
+
+  Produce a non-zero exit status if any warnings are emitted.
+
 .. option:: -o <filename>
 
   Specify the output file name. Must be specified exactly once.
diff --git a/llvm/test/tools/llvm-libtool-darwin/create-static-lib.test b/llvm/test/tools/llvm-libtool-darwin/create-static-lib.test
--- a/llvm/test/tools/llvm-libtool-darwin/create-static-lib.test
+++ b/llvm/test/tools/llvm-libtool-darwin/create-static-lib.test
@@ -58,6 +58,14 @@
 # DUPLICATE-INPUT-DAG: [[INPUTA]]
 # DUPLICATE-INPUT-DAG: [[INPUTB]]
 
+# RUN: not llvm-libtool-darwin -warnings_as_errors -static -o %t.lib %t-input1.o %t-input2.o %t-input1.o 2>&1 | \
+# RUN:   FileCheck %s --check-prefix=ERROR-DUPLICATE-INPUT -DFILE=%basename_t.tmp-input1.o \
+# RUN:     -DINPUTA=%t-input1.o -DINPUTB=%t-input1.o
+
+# ERROR-DUPLICATE-INPUT:     error: file '[[FILE]]' was specified multiple times.
+# ERROR-DUPLICATE-INPUT-DAG: [[INPUTA]]
+# ERROR-DUPLICATE-INPUT-DAG: [[INPUTB]]
+
 ## Make sure we can combine object files with the same name if
 ## they are for different architectures.
 # RUN: mkdir -p %t/arm64 %t/armv7
diff --git a/llvm/test/tools/llvm-libtool-darwin/no-symbols-warning.test b/llvm/test/tools/llvm-libtool-darwin/no-symbols-warning.test
--- a/llvm/test/tools/llvm-libtool-darwin/no-symbols-warning.test
+++ b/llvm/test/tools/llvm-libtool-darwin/no-symbols-warning.test
@@ -11,6 +11,11 @@
 
 # WARNING: warning: '[[PREFIX]]-x86_64-empty.o': has no symbols for architecture x86_64
 
+# RUN: not llvm-libtool-darwin -static -warnings_as_errors -o %t-error.lib %t-x86_64-empty.o 2>&1 | \
+# RUN:   FileCheck --check-prefix=ERROR %s -DPREFIX=%basename_t.tmp
+
+# ERROR: error: '[[PREFIX]]-x86_64-empty.o': has no symbols for architecture x86_64
+
 # RUN: llvm-libtool-darwin -no_warning_for_no_symbols -static -o %t.lib \
 # RUN:   %t-x86_64-empty.o 2>&1 | \
 # RUN:   FileCheck %s --allow-empty --implicit-check-not='warning:'
diff --git a/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp b/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
--- a/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
+++ b/llvm/tools/llvm-libtool-darwin/llvm-libtool-darwin.cpp
@@ -98,6 +98,11 @@
     cl::desc("Do not warn about files that have no symbols"),
     cl::cat(LibtoolCategory), cl::init(false));
 
+static cl::opt<bool> WarningsAsErrors("warnings_as_errors",
+                                      cl::desc("Treat warnings as errors"),
+                                      cl::cat(LibtoolCategory),
+                                      cl::init(false));
+
 static const std::array<std::string, 3> StandardSearchDirs{
     "/lib",
     "/usr/lib",
@@ -370,10 +375,17 @@
         return Error::success();
       }
 
-      if (!NoWarningForNoSymbols && O->symbols().empty())
-        WithColor::warning() << "'" + Member.MemberName +
-                                    "': has no symbols for architecture " +
-                                    O->getArchTriple().getArchName() + "\n";
+      if (!NoWarningForNoSymbols && O->symbols().empty()) {
+        Error E = createFileError(
+            Member.MemberName,
+            createStringError(std::errc::invalid_argument,
+                              "has no symbols for architecture %s",
+                              O->getArchTriple().getArchName().str().c_str()));
+
+        if (WarningsAsErrors)
+          return E;
+        WithColor::defaultWarningHandler(std::move(E));
+      }
 
       uint64_t FileCPUID = getCPUID(FileCPUType, FileCPUSubtype);
       Builder.Data.MembersPerArchitecture[FileCPUID].push_back(
@@ -581,8 +593,11 @@
 
   const auto &NewMembers = DataOrError->MembersPerArchitecture;
 
-  if (Error E = checkForDuplicates(NewMembers))
+  if (Error E = checkForDuplicates(NewMembers)) {
+    if (WarningsAsErrors)
+      return E;
     WithColor::defaultWarningHandler(std::move(E));
+  }
 
   if (NewMembers.size() == 1)
     return writeArchive(OutputFile, NewMembers.begin()->second.getMembers(),