Index: lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- lib/Driver/ToolChains/CommonArgs.cpp
+++ lib/Driver/ToolChains/CommonArgs.cpp
@@ -1160,9 +1160,17 @@
   ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(Args);
 
   switch (RLT) {
-  case ToolChain::RLT_CompilerRT:
-    CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
+  case ToolChain::RLT_CompilerRT: {
+    StringRef Path = TC.getCompilerRTArgString(Args, "builtins");
+    StringRef Dir = llvm::sys::path::parent_path(Path);
+    StringRef Filename = llvm::sys::path::filename(Path);
+    if (Filename.consume_front("lib") && Filename.consume_back(".a")) {
+      CmdArgs.push_back(Args.MakeArgString("-L" + Dir));
+      CmdArgs.push_back(Args.MakeArgString("-l" + Filename));
+    } else
+      CmdArgs.push_back(Path);
     break;
+  }
   case ToolChain::RLT_Libgcc:
     // Make sure libgcc is not used under MSVC environment by default
     if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
Index: test/Driver/arm-compiler-rt.c
===================================================================
--- test/Driver/arm-compiler-rt.c
+++ test/Driver/arm-compiler-rt.c
@@ -1,21 +1,21 @@
 // RUN: %clang -target arm-linux-gnueabi -rtlib=compiler-rt -### %s 2>&1 | FileCheck %s -check-prefix ARM-GNUEABI
-// ARM-GNUEABI: "{{.*[/\\]}}libclang_rt.builtins-arm.a"
+// ARM-GNUEABI: "-lclang_rt.builtins-arm"
 
 // RUN: %clang -target arm-linux-gnueabi -rtlib=compiler-rt -mfloat-abi=hard -### %s 2>&1 | FileCheck %s -check-prefix ARM-GNUEABI-ABI
-// ARM-GNUEABI-ABI: "{{.*[/\\]}}libclang_rt.builtins-armhf.a"
+// ARM-GNUEABI-ABI: "-lclang_rt.builtins-armhf"
 
 // RUN: %clang -target arm-linux-gnueabihf -rtlib=compiler-rt -### %s 2>&1 | FileCheck %s -check-prefix ARM-GNUEABIHF
-// ARM-GNUEABIHF: "{{.*[/\\]}}libclang_rt.builtins-armhf.a"
+// ARM-GNUEABIHF: "-lclang_rt.builtins-armhf"
 
 // RUN: %clang -target arm-linux-gnueabihf -rtlib=compiler-rt -mfloat-abi=soft -### %s 2>&1 | FileCheck %s -check-prefix ARM-GNUEABIHF-ABI
-// ARM-GNUEABIHF-ABI: "{{.*[/\\]}}libclang_rt.builtins-arm.a"
+// ARM-GNUEABIHF-ABI: "-lclang_rt.builtins-arm"
 
 // RUN: %clang -target arm-windows-itanium -rtlib=compiler-rt -### %s 2>&1 | FileCheck %s -check-prefix ARM-WINDOWS
 // ARM-WINDOWS: "{{.*[/\\]}}clang_rt.builtins-arm.lib"
 
 // RUN: %clang -target arm-linux-androideabi -rtlib=compiler-rt -### %s 2>&1 | FileCheck %s -check-prefix ARM-ANDROID
-// ARM-ANDROID: "{{.*[/\\]}}libclang_rt.builtins-arm-android.a"
+// ARM-ANDROID: "-lclang_rt.builtins-arm-android"
 
 // RUN: %clang -target arm-linux-androideabi -rtlib=compiler-rt -mfloat-abi=hard -### %s 2>&1 | FileCheck %s -check-prefix ARM-ANDROIDHF
-// ARM-ANDROIDHF: "{{.*[/\\]}}libclang_rt.builtins-armhf-android.a"
+// ARM-ANDROIDHF: "-lclang_rt.builtins-armhf-android"
 
Index: test/Driver/fuchsia.c
===================================================================
--- test/Driver/fuchsia.c
+++ test/Driver/fuchsia.c
@@ -25,8 +25,8 @@
 // CHECK-NOT: crti.o
 // CHECK-NOT: crtbegin.o
 // CHECK: "-L[[SYSROOT]]{{/|\\\\}}lib"
-// CHECK-X86_64: "{{.*[/\\]}}libclang_rt.builtins.a"
-// CHECK-AARCH64: "{{.*[/\\]}}libclang_rt.builtins.a"
+// CHECK-X86_64: -lclang_rt.builtins
+// CHECK-AARCH64: -lclang_rt.builtins
 // CHECK: "-lc"
 // CHECK-NOT: crtend.o
 // CHECK-NOT: crtn.o
Index: test/Driver/fuchsia.cpp
===================================================================
--- test/Driver/fuchsia.cpp
+++ test/Driver/fuchsia.cpp
@@ -16,7 +16,7 @@
 // CHECK-NOT: crtbegin.o
 // CHECK: "-L[[SYSROOT]]{{/|\\\\}}lib"
 // CHECK: "-lc++" "-lm"
-// CHECK: "{{.*[/\\]}}libclang_rt.builtins-x86_64.a"
+// CHECK: "-lclang_rt.builtins-x86_64"
 // CHECK: "-lc"
 // CHECK-NOT: crtend.o
 // CHECK-NOT: crtn.o
Index: test/Driver/linux-ld.c
===================================================================
--- test/Driver/linux-ld.c
+++ test/Driver/linux-ld.c
@@ -66,9 +66,9 @@
 // CHECK-LD-RT: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/4.6.0/../../.."
 // CHECK-LD-RT: "-L[[SYSROOT]]/lib"
 // CHECK-LD-RT: "-L[[SYSROOT]]/usr/lib"
-// CHECK-LD-RT: libclang_rt.builtins-x86_64.a"
+// CHECK-LD-RT: "-lclang_rt.builtins-x86_64"
 // CHECK-LD-RT: "-lc"
-// CHECK-LD-RT: libclang_rt.builtins-x86_64.a"
+// CHECK-LD-RT: "-lclang_rt.builtins-x86_64"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=i686-unknown-linux \
@@ -87,9 +87,9 @@
 // CHECK-LD-RT-I686: "-L[[SYSROOT]]/usr/lib/gcc/i686-unknown-linux/4.6.0/../../.."
 // CHECK-LD-RT-I686: "-L[[SYSROOT]]/lib"
 // CHECK-LD-RT-I686: "-L[[SYSROOT]]/usr/lib"
-// CHECK-LD-RT-I686: libclang_rt.builtins-i386.a"
+// CHECK-LD-RT-I686: "-lclang_rt.builtins-i386"
 // CHECK-LD-RT-I686: "-lc"
-// CHECK-LD-RT-I686: libclang_rt.builtins-i386.a"
+// CHECK-LD-RT-I686: "-lclang_rt.builtins-i386"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=arm-linux-androideabi \
@@ -102,9 +102,9 @@
 // CHECK-LD-RT-ANDROID: "--eh-frame-hdr"
 // CHECK-LD-RT-ANDROID: "-m" "armelf_linux_eabi"
 // CHECK-LD-RT-ANDROID: "-dynamic-linker"
-// CHECK-LD-RT-ANDROID: libclang_rt.builtins-arm-android.a"
+// CHECK-LD-RT-ANDROID: "-lclang_rt.builtins-arm-android"
 // CHECK-LD-RT-ANDROID: "-lc"
-// CHECK-LD-RT-ANDROID: libclang_rt.builtins-arm-android.a"
+// CHECK-LD-RT-ANDROID: "-lclang_rt.builtins-arm-android"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=x86_64-unknown-linux -rtlib=platform \
Index: test/Driver/wasm-toolchain.c
===================================================================
--- test/Driver/wasm-toolchain.c
+++ test/Driver/wasm-toolchain.c
@@ -14,10 +14,10 @@
 
 // RUN: %clang -### -no-canonical-prefixes -target wasm32-unknown-unknown --sysroot=/foo -fuse-ld=wasm-ld %s 2>&1 | FileCheck -check-prefix=LINK %s
 // LINK: clang{{.*}}" "-cc1" {{.*}} "-o" "[[temp:[^"]*]]"
-// LINK: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc" "{{.*[/\\]}}libclang_rt.builtins-wasm32.a" "-o" "a.out"
+// LINK: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc" "-lclang_rt.builtins-wasm32" "-o" "a.out"
 
 // A basic C link command-line with optimization.
 
 // RUN: %clang -### -O2 -no-canonical-prefixes -target wasm32-unknown-unknown --sysroot=/foo -fuse-ld=wasm-ld %s 2>&1 | FileCheck -check-prefix=LINK_OPT %s
 // LINK_OPT: clang{{.*}}" "-cc1" {{.*}} "-o" "[[temp:[^"]*]]"
-// LINK_OPT: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc" "{{.*[/\\]}}libclang_rt.builtins-wasm32.a" "-o" "a.out"
+// LINK_OPT: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc" "-lclang_rt.builtins-wasm32" "-o" "a.out"
Index: test/Driver/wasm-toolchain.cpp
===================================================================
--- test/Driver/wasm-toolchain.cpp
+++ test/Driver/wasm-toolchain.cpp
@@ -14,10 +14,10 @@
 
 // RUN: %clangxx -### -no-canonical-prefixes -target wasm32-unknown-unknown --sysroot=/foo --stdlib=c++ -fuse-ld=wasm-ld %s 2>&1 | FileCheck -check-prefix=LINK %s
 // LINK: clang{{.*}}" "-cc1" {{.*}} "-o" "[[temp:[^"]*]]"
-// LINK: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc++" "-lc++abi" "-lc" "{{.*[/\\]}}libclang_rt.builtins-wasm32.a" "-o" "a.out"
+// LINK: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc++" "-lc++abi" "-lc" "-lclang_rt.builtins-wasm32" "-o" "a.out"
 
 // A basic C++ link command-line with optimization.
 
 // RUN: %clangxx -### -O2 -no-canonical-prefixes -target wasm32-unknown-unknown --sysroot=/foo %s --stdlib=c++ -fuse-ld=wasm-ld 2>&1 | FileCheck -check-prefix=LINK_OPT %s
 // LINK_OPT: clang{{.*}}" "-cc1" {{.*}} "-o" "[[temp:[^"]*]]"
-// LINK_OPT: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc++" "-lc++abi" "-lc" "{{.*[/\\]}}libclang_rt.builtins-wasm32.a" "-o" "a.out"
+// LINK_OPT: wasm-ld{{.*}}" "-L/foo/lib" "crt1.o" "[[temp]]" "-lc++" "-lc++abi" "-lc" "-lclang_rt.builtins-wasm32" "-o" "a.out"