Index: lib/Support/Unix/Path.inc
===================================================================
--- lib/Support/Unix/Path.inc
+++ lib/Support/Unix/Path.inc
@@ -44,6 +44,7 @@
 #  include <ndir.h>
 # endif
 #endif
+#include <pwd.h>
 
 #ifdef __APPLE__
 #include <mach-o/dyld.h>
@@ -546,7 +547,10 @@
 namespace path {
 
 bool home_directory(SmallVectorImpl<char> &result) {
-  if (char *RequestedDir = getenv("HOME")) {
+  char *RequestedDir = getenv("HOME");
+  if (!RequestedDir)
+    RequestedDir = getpwuid(getuid())->pw_dir;
+  if (RequestedDir) {
     result.clear();
     result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
     return true;