Index: test/tools/llvm-objcopy/basic-strip.test
===================================================================
--- test/tools/llvm-objcopy/basic-strip.test
+++ test/tools/llvm-objcopy/basic-strip.test
@@ -1,5 +1,5 @@
 # RUN: yaml2obj %s > %t
-# RUN: llvm-strip %t %t2
+# RUN: llvm-strip %t -o %t2
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 
 !ELF
Index: test/tools/llvm-objcopy/explicit-out.test
===================================================================
--- /dev/null
+++ test/tools/llvm-objcopy/explicit-out.test
@@ -0,0 +1,23 @@
+# RUN: yaml2obj %s > %t
+# RUN: llvm-objcopy %t -o %t2
+# RUN: llvm-objcopy %t %t3
+# RUN: diff %t2 %t3 
+
+!ELF
+FileHeader:
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_REL
+  Machine:         EM_X86_64
+Sections:
+  - Name:            .bss
+    Type:            SHT_NOBITS
+    Flags:           [ SHF_ALLOC ]
+  - Name:            .text
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
+  - Name:            .blarg
+    Type:            SHT_PROGBITS
+    Flags:           [ ]
+  - Name:            .gnu.warning.foo
+    Type:            SHT_PROGBITS
Index: tools/llvm-objcopy/llvm-objcopy.cpp
===================================================================
--- tools/llvm-objcopy/llvm-objcopy.cpp
+++ tools/llvm-objcopy/llvm-objcopy.cpp
@@ -276,6 +276,8 @@
 
 static cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input>"));
 static cl::opt<std::string> OutputFilename(cl::Positional, cl::desc("<output>"));
+static cl::alias ExplicitOutput("o", cl::desc("file to output to"),
+                                cl::aliasopt(OutputFilename));
 static cl::opt<std::string>
     OutputFormat("O", cl::desc("Set output format to one of the following:"
                                "\n\tbinary\n\telf"), cl::init("elf"));