Cleanup the interface for creating soft or hard links.

Before this patch the unix code for creating hardlinks was unused. The code
for creating symbolic links was implemented in lib/Support/LockFileManager.cpp
and the code for creating hard links in lib/Support/*/Path.inc.

The only use we have for these is in LockFileManager.cpp and it can use both
soft and hard links. Just have a create_link function that creates one or the
other depending on the platform.

llvm-svn: 203596

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index caa30c7..2b29bac 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -272,14 +272,16 @@ error_code create_directory(const Twine &path, bool IgnoreExisting) {
   return error_code::success();
 }
 
-error_code create_hard_link(const Twine &to, const Twine &from) {
+// Note that we are using symbolic link because hard links are not supported by
+// all filesystems (SMB doesn't).
+error_code create_link(const Twine &to, const Twine &from) {
   // Get arguments.
   SmallString<128> from_storage;
   SmallString<128> to_storage;
   StringRef f = from.toNullTerminatedStringRef(from_storage);
   StringRef t = to.toNullTerminatedStringRef(to_storage);
 
-  if (::link(t.begin(), f.begin()) == -1)
+  if (::symlink(t.begin(), f.begin()) == -1)
     return error_code(errno, system_category());
 
   return error_code::success();