Index: llvm-toolchain-3.3-3.3/clang/lib/Basic/FileManager.cpp
===================================================================
--- llvm-toolchain-3.3-3.3.orig/clang/lib/Basic/FileManager.cpp	2013-01-26 17:29:36.000000000 +0100
+++ llvm-toolchain-3.3-3.3/clang/lib/Basic/FileManager.cpp	2013-08-23 09:53:21.538337851 +0200
@@ -43,6 +43,11 @@
 #if defined(LLVM_ON_UNIX)
 #include <limits.h>
 #endif
+// For GNU Hurd
+#if defined(__GNU__) && !defined(PATH_MAX)
+# define PATH_MAX 4096
+#endif
+
 using namespace clang;
 
 // FIXME: Enhance libsystem to support inode and other fields.