[driver] If we're just linking, don't report --param X as unused option.
PR15327 rdar://13372628 llvm-svn: 176670
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@ -1165,7 +1165,7 @@ def _output_class_directory_EQ : Joined<["--"], "output-class-directory=">, Alia
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def _output_class_directory : Separate<["--"], "output-class-directory">, Alias<foutput_class_dir_EQ>;
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def _output_EQ : Joined<["--"], "output=">, Alias<o>;
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def _output : Separate<["--"], "output">, Alias<o>;
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def _param : Separate<["--"], "param">;
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def _param : Separate<["--"], "param">, Group<CompileOnly_Group>;
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def _param_EQ : Joined<["--"], "param=">, Alias<_param>;
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def _prefix_EQ : Joined<["--"], "prefix=">, Alias<B>;
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def _prefix : Separate<["--"], "prefix">, Alias<B>;
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@ -0,0 +1,3 @@
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// RUN: touch %t.o
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// RUN: %clang --param ssp-buffer-size=1 %t.o -### 2>&1 | FileCheck %s
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// CHECK-NOT: warning: argument unused during compilation: '--param ssp-buffer-size=1'
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