Add support for GNU Hurd in Path.inc and other places

Summary: Patch by Svante Signell & myself

Reviewers: rnk, JDevlieghere, efriedma

Reviewed By: efriedma

Subscribers: efriedma, JDevlieghere, krytarowski, llvm-commits, kristina

Differential Revision: https://reviews.llvm.org/D53409

llvm-svn: 345007

Author: sylvestre

llvm/lib/Support/Unix/Path.inc

@@ -49,6 +49,7 @@
 // For GNU Hurd
 #if defined(__GNU__) && !defined(PATH_MAX)
 # define PATH_MAX 4096
+# define MAXPATHLEN 4096
 #endif
 
 #include <sys/types.h>
@@ -82,7 +83,7 @@
 #define STATVFS_F_FRSIZE(vfs) static_cast<uint64_t>(vfs.f_bsize)
 #endif
 
-#if defined(__NetBSD__)
+#if defined(__NetBSD__) || defined(__GNU__)
 #define STATVFS_F_FLAG(vfs) (vfs).f_flag
 #else
 #define STATVFS_F_FLAG(vfs) (vfs).f_flags
@@ -98,7 +99,7 @@ const file_t kInvalidFile = -1;
 
 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) ||     \
     defined(__minix) || defined(__FreeBSD_kernel__) || defined(__linux__) ||   \
-    defined(__CYGWIN__) || defined(__DragonFly__) || defined(_AIX)
+    defined(__CYGWIN__) || defined(__DragonFly__) || defined(_AIX) || defined(__GNU__)
 static int
 test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
 {
@@ -347,7 +348,7 @@ std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
 }
 
 static bool is_local_impl(struct STATVFS &Vfs) {
-#if defined(__linux__)
+#if defined(__linux__) || defined(__GNU__)
 #ifndef NFS_SUPER_MAGIC
 #define NFS_SUPER_MAGIC 0x6969
 #endif
@@ -357,7 +358,11 @@ static bool is_local_impl(struct STATVFS &Vfs) {
 #ifndef CIFS_MAGIC_NUMBER
 #define CIFS_MAGIC_NUMBER 0xFF534D42
 #endif
+#ifdef __GNU__
+  switch ((uint32_t)Vfs.__f_type) {
+#else
   switch ((uint32_t)Vfs.f_type) {
+#endif
   case NFS_SUPER_MAGIC:
   case SMB_SUPER_MAGIC:
   case CIFS_MAGIC_NUMBER: