cmSystemTools: Silence CreateLink and CreateSymlink errors

If provided, report errors to a std::string.
This allows "silent" fallback to another flow, like COPY_ON_ERROR.

1 files changed, 4 insertions, 2 deletions

diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index 15f27e5..489811d 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -528,12 +528,14 @@ public:
   /** Create a symbolic link if the platform supports it.  Returns whether
       creation succeeded. */
   static bool CreateSymlink(const std::string& origName,
-                            const std::string& newName);
+                            const std::string& newName,
+                            std::string* errorMessage = nullptr);
 
   /** Create a hard link if the platform supports it.  Returns whether
       creation succeeded. */
   static bool CreateLink(const std::string& origName,
-                         const std::string& newName);
+                         const std::string& newName,
+                         std::string* errorMessage = nullptr);
 
 private:
   static bool s_ForceUnixPaths;