Index: wasm/Config.h
===================================================================
--- wasm/Config.h
+++ wasm/Config.h
@@ -36,7 +36,6 @@
   uint32_t ZStackSize;
   llvm::StringRef Entry;
   llvm::StringRef OutputFile;
-  llvm::StringRef Sysroot;
 
   llvm::StringSet<> AllowUndefinedSymbols;
   std::vector<llvm::StringRef> SearchPaths;
Index: wasm/Driver.cpp
===================================================================
--- wasm/Driver.cpp
+++ wasm/Driver.cpp
@@ -254,7 +254,6 @@
   Config->SearchPaths = args::getStrings(Args, OPT_L);
   Config->StripAll = Args.hasArg(OPT_strip_all);
   Config->StripDebug = Args.hasArg(OPT_strip_debug);
-  Config->Sysroot = Args.getLastArgValue(OPT_sysroot);
   errorHandler().Verbose = Args.hasArg(OPT_verbose);
   ThreadsEnabled = Args.hasFlag(OPT_threads, OPT_no_threads, true);
   if (Config->Relocatable)
Index: wasm/Options.td
===================================================================
--- wasm/Options.td
+++ wasm/Options.td
@@ -52,8 +52,6 @@
 
 def strip_debug: F<"strip-debug">, HelpText<"Strip debugging information">;
 
-def sysroot: J<"sysroot=">, HelpText<"Set the system root">;
-
 def z: JoinedOrSeparate<["-"], "z">, MetaVarName<"<option>">,
   HelpText<"Linker option extensions">;