Driver: Use sys::Process::SetWorkingDirectory, for consistency.

llvm-svn: 140434

clang/lib/Driver/Driver.cpp

@@ -38,17 +38,12 @@
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/Program.h"
+#include "llvm/Support/Process.h"
 
 #include "InputInfo.h"
 
 #include <map>
 
-#if defined(HAVE_UNISTD_H)
-#include <unistd.h>
-#elif defined(_WIN32)
-#include <direct.h>
-#endif
-
 using namespace clang::driver;
 using namespace clang;
 
@@ -333,7 +328,7 @@ Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
   // internally to support good use as a library, but for now we just change our
   // working directory.
   if (const Arg *A = Args->getLastArg(options::OPT__working_directory)) {
-    ::chdir(A->getValue(*Args));
+    llvm::sys::Process::SetWorkingDirectory(A->getValue(*Args));
   }
 
   Host = GetHostInfo(DefaultHostTriple.c_str());