From d0cf6c852a8da772af89ae129a40d600e49f1bc2 Mon Sep 17 00:00:00 2001
From: Michael Zolotukhin <mzolotukhin@apple.com>
Date: Tue, 17 Mar 2015 22:13:05 +0000
Subject: [PATCH] Imply linker arguments from '-fveclib' option.

Summary: As discussed in D8097, we should provide corresponding linking flags when 'fveclib' is specified.

Reviewers: hfinkel

Differential Revision: http://reviews.llvm.org/D8362

llvm-svn: 232556
---
 clang/lib/Driver/Tools.cpp  | 10 ++++++++++
 clang/test/Driver/fveclib.c |  9 +++++++++
 2 files changed, 19 insertions(+)

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 3650a94b92bc..681a9a388503 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -6138,6 +6138,16 @@ void darwin::Link::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(Args.MakeArgString(std::string("-F") +
                                          (*it)->getValue()));
 
+  if (!Args.hasArg(options::OPT_nostdlib) &&
+      !Args.hasArg(options::OPT_nodefaultlibs)) {
+    if (Arg *A = Args.getLastArg(options::OPT_fveclib)) {
+      if (A->getValue() == StringRef("Accelerate")) {
+        CmdArgs.push_back("-framework");
+        CmdArgs.push_back("Accelerate");
+      }
+    }
+  }
+
   const char *Exec =
     Args.MakeArgString(getToolChain().GetLinkerPath());
   std::unique_ptr<Command> Cmd =
diff --git a/clang/test/Driver/fveclib.c b/clang/test/Driver/fveclib.c
index 4515dd77316f..3bd4bf630f0a 100644
--- a/clang/test/Driver/fveclib.c
+++ b/clang/test/Driver/fveclib.c
@@ -6,3 +6,12 @@
 // CHECK-ACCELERATE: "-fveclib=Accelerate"
 
 // CHECK-INVALID: error: invalid value 'something' in '-fveclib=something'
+
+// RUN: %clang -fveclib=Accelerate %s -target arm64-apple-ios8.0.0 -### 2>&1 | FileCheck --check-prefix=CHECK-LINK %s
+// CHECK-LINK: "-framework" "Accelerate"
+
+// RUN: %clang -fveclib=Accelerate %s -nostdlib -target arm64-apple-ios8.0.0 -### 2>&1 | FileCheck --check-prefix=CHECK-LINK-NOSTDLIB %s
+// CHECK-LINK-NOSTDLIB-NOT: "-framework" "Accelerate"
+
+// RUN: %clang -fveclib=Accelerate %s -nodefaultlibs -target arm64-apple-ios8.0.0 -### 2>&1 | FileCheck --check-prefix=CHECK-LINK-NODEFAULTLIBS %s
+// CHECK-LINK-NODEFAULTLIBS-NOT: "-framework" "Accelerate"