Driver/Darwin: Honor --sysroot= when invoking the linker, on Darwin.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130723 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 6 deletions

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 60803ddf93..89cf228d95 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -2893,12 +2893,17 @@ void darwin::Link::AddLinkArgs(Compilation &C,
   Args.AddAllArgs(CmdArgs, options::OPT_sub__library);
   Args.AddAllArgs(CmdArgs, options::OPT_sub__umbrella);
 
-  Args.AddAllArgsTranslated(CmdArgs, options::OPT_isysroot, "-syslibroot");
-  if (getDarwinToolChain().isTargetIPhoneOS()) {
-    if (!Args.hasArg(options::OPT_isysroot)) {
-      CmdArgs.push_back("-syslibroot");
-      CmdArgs.push_back("/Developer/SDKs/Extra");
-    }
+  // Give --sysroot= preference, over the Apple specific behavior to also use
+  // --isysroot as the syslibroot.
+  if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ)) {
+    CmdArgs.push_back("-syslibroot");
+    CmdArgs.push_back(A->getValue(Args));
+  } else if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
+    CmdArgs.push_back("-syslibroot");
+    CmdArgs.push_back(A->getValue(Args));
+  } else if (getDarwinToolChain().isTargetIPhoneOS()) {
+    CmdArgs.push_back("-syslibroot");
+    CmdArgs.push_back("/Developer/SDKs/Extra");
   }
 
   Args.AddLastArg(CmdArgs, options::OPT_twolevel__namespace);