Index: llvm-toolchain-snapshot_3.5~svn201843/clang/lib/Basic/FileManager.cpp
===================================================================
--- llvm-toolchain-snapshot_3.5~svn201843.orig/clang/lib/Basic/FileManager.cpp	2014-02-21 11:13:02.574417177 +0100
+++ llvm-toolchain-snapshot_3.5~svn201843/clang/lib/Basic/FileManager.cpp	2014-02-21 11:13:02.570417177 +0100
@@ -43,6 +43,10 @@
 /// represent a filename that doesn't exist on the disk.
 #define NON_EXISTENT_FILE reinterpret_cast<FileEntry*>((intptr_t)-1)
 
+// For GNU Hurd
+#if defined(__GNU__) && !defined(PATH_MAX)
+# define PATH_MAX 4096
+#endif
 
 class FileManager::UniqueDirContainer {
   /// UniqueDirs - Cache from ID's to existing directories/files.
Index: llvm-toolchain-snapshot_3.5~svn201843/lldb/include/lldb/lldb-defines.h
===================================================================
--- llvm-toolchain-snapshot_3.5~svn201843.orig/lldb/include/lldb/lldb-defines.h	2014-02-21 11:13:02.574417177 +0100
+++ llvm-toolchain-snapshot_3.5~svn201843/lldb/include/lldb/lldb-defines.h	2014-02-21 11:13:02.570417177 +0100
@@ -12,6 +12,11 @@
 
 #include "lldb/lldb-types.h"
 
+// For GNU Hurd
+#if defined(__GNU__) && !defined(PATH_MAX)
+# define PATH_MAX 4096
+#endif
+
 #if !defined(UINT32_MAX)
     #define UINT32_MAX 4294967295U
 #endif
Index: llvm-toolchain-snapshot_3.5~svn201843/lib/Support/Unix/Path.inc
===================================================================
--- llvm-toolchain-snapshot_3.5~svn201843.orig/lib/Support/Unix/Path.inc	2014-02-21 11:13:02.574417177 +0100
+++ llvm-toolchain-snapshot_3.5~svn201843/lib/Support/Unix/Path.inc	2014-02-21 11:13:02.570417177 +0100
@@ -58,6 +58,7 @@
 // For GNU Hurd
 #if defined(__GNU__) && !defined(PATH_MAX)
 # define PATH_MAX 4096
+# define MAXPATHLEN 4096
 #endif
 
 using namespace llvm;