Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -1538,6 +1538,7 @@
 def pthreads : Flag<["-"], "pthreads">;
 def pthread : Flag<["-"], "pthread">, Flags<[CC1Option]>,
   HelpText<"Support POSIX threads in generated code">;
+def no_pthread : Flag<["-"], "no-pthread">, Flags<[CC1Option]>;
 def p : Flag<["-"], "p">;
 def pie : Flag<["-"], "pie">;
 def read__only__relocs : Separate<["-"], "read_only_relocs">;
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -9008,7 +9008,8 @@
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lgmon");
 
-      if (Args.hasArg(options::OPT_pthread))
+      if (Args.hasArg(options::OPT_pthread)  &&
+          !Args.hasArg(options::OPT_no_pthread))
         CmdArgs.push_back("-lpthread");
 
       // add system libraries