New clang option -fno-plt which avoids the PLT and lazy binding while making external calls.

Differential Revision: https://reviews.llvm.org/D39079

llvm-svn: 317605
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 692b20b..ca1c65e 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -653,6 +653,7 @@
       Args.hasArg(OPT_mincremental_linker_compatible);
   Opts.PIECopyRelocations =
       Args.hasArg(OPT_mpie_copy_relocations);
+  Opts.NoPLT = Args.hasArg(OPT_fno_plt);
   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);