diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index 6c8bba576442..5971a0ae4472 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -916,8 +916,10 @@ void MachO::AddLinkRuntimeLib(const ArgList &Args, ArgStringList &CmdArgs,
     DarwinLibName += Component;
     if (!(Opts & RLO_IsEmbedded))
       DarwinLibName += "_";
-  }
-  DarwinLibName += getOSLibraryNameSuffix();
+    DarwinLibName += getOSLibraryNameSuffix();
+  } else
+    DarwinLibName += getOSLibraryNameSuffix(true);
+
   DarwinLibName += IsShared ? "_dynamic.dylib" : ".a";
   SmallString<128> Dir(getDriver().ResourceDir);
   llvm::sys::path::append(
@@ -983,16 +985,19 @@ StringRef Darwin::getSDKName(StringRef isysroot) {
   return "";
 }
 
-StringRef Darwin::getOSLibraryNameSuffix() const {
-  switch(TargetPlatform) {
+StringRef Darwin::getOSLibraryNameSuffix(bool IgnoreSim) const {
+  switch (TargetPlatform) {
   case DarwinPlatformKind::MacOS:
     return "osx";
   case DarwinPlatformKind::IPhoneOS:
-    return TargetEnvironment == NativeEnvironment ? "ios" : "iossim";
+    return TargetEnvironment == NativeEnvironment || IgnoreSim ? "ios"
+                                                               : "iossim";
   case DarwinPlatformKind::TvOS:
-    return TargetEnvironment == NativeEnvironment ? "tvos" : "tvossim";
+    return TargetEnvironment == NativeEnvironment || IgnoreSim ? "tvos"
+                                                               : "tvossim";
   case DarwinPlatformKind::WatchOS:
-    return TargetEnvironment == NativeEnvironment ? "watchos" : "watchossim";
+    return TargetEnvironment == NativeEnvironment || IgnoreSim ? "watchos"
+                                                               : "watchossim";
   }
   llvm_unreachable("Unsupported platform");
 }
diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
index 98ad7431919a..73c4ac6aecaa 100644
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -252,7 +252,9 @@ public:
     return llvm::ExceptionHandling::None;
   }
 
-  virtual StringRef getOSLibraryNameSuffix() const { return ""; }
+  virtual StringRef getOSLibraryNameSuffix(bool IgnoreSim = false) const {
+    return "";
+  }
 
   /// }
 };
@@ -420,7 +422,7 @@ protected:
                              Action::OffloadKind DeviceOffloadKind) const override;
 
   StringRef getPlatformFamily() const;
-  StringRef getOSLibraryNameSuffix() const override;
+  StringRef getOSLibraryNameSuffix(bool IgnoreSim = false) const override;
 
 public:
   static StringRef getSDKName(StringRef isysroot);
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.cc_kext_tvos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.cc_kext_tvos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.cc_kext_watchos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.cc_kext_watchos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.ios.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.ios.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.osx.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.osx.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.profile_tvos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.profile_tvos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.profile_watchos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.profile_watchos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.tvos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.tvos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.watchos.a b/clang/test/Driver/Inputs/resource_dir/lib/darwin/libclang_rt.watchos.a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/clang/test/Driver/darwin-ld.c b/clang/test/Driver/darwin-ld.c
index c98d1abcab29..3c339a117d76 100644
--- a/clang/test/Driver/darwin-ld.c
+++ b/clang/test/Driver/darwin-ld.c
@@ -152,78 +152,51 @@
 // RUN: FileCheck -check-prefix=LINK_NO_IOS_ARM64_CRT1 %s < %t.log
 // LINK_NO_IOS_ARM64_CRT1-NOT: crt
 
-// RUN: %clang -target x86_64-apple-ios6.0 -miphoneos-version-min=6.0 -fprofile-instr-generate -### %t.o 2> %t.log
+// RUN: %clang -target x86_64-apple-ios6.0 -miphoneos-version-min=6.0 -fprofile-instr-generate -resource-dir=%S/Inputs/resource_dir -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_IOSSIM_PROFILE %s < %t.log
 // LINK_IOSSIM_PROFILE: {{ld(.exe)?"}}
 // LINK_IOSSIM_PROFILE: libclang_rt.profile_iossim.a
+// LINK_IOSSIM_PROFILE: libclang_rt.ios.a
 
-// FIXME: Currently the builtin library is only added to the command line if it,
-// so we can't check for it here
-// FIXME_LINK_IOSSIM_PROFILE: libclang_rt.ios.a
-
-// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -### %t.o 2> %t.log
+// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -resource-dir=%S/Inputs/resource_dir -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_TVOS_ARM64 %s < %t.log
 // LINK_TVOS_ARM64: {{ld(.exe)?"}}
 // LINK_TVOS_ARM64: -tvos_version_min
 // LINK_TVOS_ARM64-NOT: crt
 // LINK_TVOS_ARM64-NOT: lgcc_s.1
-// FIXME: This library does not get built unless the tvOS SDK is
-// installed, and the driver will not try to link it if it does not exist.
-// This should be reenabled when the tvOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_TVOS_ARM64: libclang_rt.tvos.a
+// LINK_TVOS_ARM64: libclang_rt.tvos.a
 
-// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -fprofile-instr-generate -### %t.o 2> %t.log
+// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -fprofile-instr-generate -resource-dir=%S/Inputs/resource_dir  -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_TVOS_PROFILE %s < %t.log
 // LINK_TVOS_PROFILE: {{ld(.exe)?"}}
-// FIXME: These libraries do not get built unless the tvOS SDK is
-// installed, and the driver will not try to link them if they do not exist.
-// This should be reenabled when the tvOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_TVOS_PROFILE: libclang_rt.profile_tvos.a
-// FIXME_LINK_TVOS_PROFILE: libclang_rt.tvos.a
+// LINK_TVOS_PROFILE: libclang_rt.profile_tvos.a
+// LINK_TVOS_PROFILE: libclang_rt.tvos.a
 
-// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -### %t.o -lcc_kext 2> %t.log
+// RUN: %clang -target arm64-apple-tvos8.3 -mtvos-version-min=8.3 -resource-dir=%S/Inputs/resource_dir -### %t.o -lcc_kext 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_TVOS_KEXT %s < %t.log
 // LINK_TVOS_KEXT: {{ld(.exe)?"}}
-// FIXME: These libraries do not get built unless the tvOS SDK is
-// installed, and the driver will not try to link them if they do not exist.
-// This should be reenabled when the tvOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_TVOS_KEXT: libclang_rt.cc_kext_tvos.a
-// FIXME_LINK_TVOS_KEXT: libclang_rt.tvos.a
+// LINK_TVOS_KEXT: libclang_rt.cc_kext_tvos.a
+// LINK_TVOS_KEXT: libclang_rt.tvos.a
 
-// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -### %t.o 2> %t.log
+// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -resource-dir=%S/Inputs/resource_dir -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_WATCHOS_ARM %s < %t.log
 // LINK_WATCHOS_ARM: {{ld(.exe)?"}}
 // LINK_WATCHOS_ARM: -watchos_version_min
 // LINK_WATCHOS_ARM-NOT: crt
 // LINK_WATCHOS_ARM-NOT: lgcc_s.1
-// FIXME: This library does not get built unless the watchOS SDK is
-// installed, and the driver will not try to link it if it does not exist.
-// This should be reenabled when the watchOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_WATCHOS_ARM: libclang_rt.watchos.a
+// LINK_WATCHOS_ARM: libclang_rt.watchos.a
 
-// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -fprofile-instr-generate -### %t.o 2> %t.log
+// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -resource-dir=%S/Inputs/resource_dir -fprofile-instr-generate -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_WATCHOS_PROFILE %s < %t.log
 // LINK_WATCHOS_PROFILE: {{ld(.exe)?"}}
-// FIXME: These libraries do not get built unless the watchOS SDK is
-// installed, and the driver will not try to link them if they do not exist.
-// This should be reenabled when the watchOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_WATCHOS_PROFILE: libclang_rt.profile_watchos.a
-// FIXME_LINK_WATCHOS_PROFILE: libclang_rt.watchos.a
+// LINK_WATCHOS_PROFILE: libclang_rt.profile_watchos.a
+// LINK_WATCHOS_PROFILE: libclang_rt.watchos.a
 
-// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -### %t.o -lcc_kext 2> %t.log
+// RUN: %clang -target armv7k-apple-watchos2.0 -mwatchos-version-min=2.0 -resource-dir=%S/Inputs/resource_dir -### %t.o -lcc_kext 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_WATCHOS_KEXT %s < %t.log
 // LINK_WATCHOS_KEXT: {{ld(.exe)?"}}
-// FIXME: These libraries do not get built unless the watchOS SDK is
-// installed, and the driver will not try to link them if they do not exist.
-// This should be reenabled when the watchOS SDK becomes a standard part
-// of Xcode.
-// FIXME_LINK_WATCHOS_KEXT: libclang_rt.cc_kext_watchos.a
-// FIXME_LINK_WATCHOS_KEXT: libclang_rt.watchos.a
+// LINK_WATCHOS_KEXT: libclang_rt.cc_kext_watchos.a
+// LINK_WATCHOS_KEXT: libclang_rt.watchos.a
 
 // RUN: %clang -target i386-apple-darwin12 -pg -### %t.o 2> %t.log
 // RUN: FileCheck -check-prefix=LINK_PG %s < %t.log