[PATCH] Forward -u to the linker on gnutools toolchains

[Reid Kleckner]

Closed by commit rL211756 (authored by @rnk).

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D4304

Files:
  cfe/trunk/lib/Driver/Tools.cpp
  cfe/trunk/test/Driver/linux-ld.c

Index: cfe/trunk/lib/Driver/Tools.cpp
===================================================================
--- cfe/trunk/lib/Driver/Tools.cpp
+++ cfe/trunk/lib/Driver/Tools.cpp
@@ -7158,6 +7158,7 @@
   }
 
   Args.AddAllArgs(CmdArgs, options::OPT_L);
+  Args.AddAllArgs(CmdArgs, options::OPT_u);
 
   const ToolChain::path_list Paths = ToolChain.getFilePaths();
 
Index: cfe/trunk/test/Driver/linux-ld.c
===================================================================
--- cfe/trunk/test/Driver/linux-ld.c
+++ cfe/trunk/test/Driver/linux-ld.c
@@ -1119,3 +1119,9 @@
 // RUN:        --sysroot=%S/Inputs/basic_linux_tree 2>& 1 \
 // RUN:   | FileCheck --check-prefix=CHECK-PG %s
 // CHECK-PG: gcrt1.o
+
+// GCC forwards -u to the linker.
+// RUN: %clang -u asdf --target=x86_64-unknown-linux -### %s \
+// RUN:        --sysroot=%S/Inputs/basic_linux_tree 2>& 1 \
+// RUN:   | FileCheck --check-prefix=CHECK-u %s
+// CHECK-u: "-u" "asdf"
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