ENH: Improve new error/warning message generation

  - Add cmListFileBacktrace to record stack traces
  - Move main IssueMessage method to the cmake class instance
    (make the backtrace an explicit argument)
  - Change cmMakefile::IssueMessage to construct a backtrace
    and call the cmake instance version
  - Record a backtrace at the point a target is created
    (useful later for messages issued by generators)

1 files changed, 15 insertions, 0 deletions

diff --git a/Source/cmListFileCache.cxx b/Source/cmListFileCache.cxx
index 2849c3d..5711da2 100644
--- a/Source/cmListFileCache.cxx
+++ b/Source/cmListFileCache.cxx
@@ -268,3 +268,18 @@ bool cmListFileCacheParseFunction(cmListFileLexer* lexer,
 
   return false;
 }
+
+//----------------------------------------------------------------------------
+std::ostream& operator<<(std::ostream& os, cmListFileContext const& lfc)
+{
+  os << lfc.FilePath;
+  if(lfc.Line)
+    {
+    os << ":" << lfc.Line;
+    if(!lfc.Name.empty())
+      {
+      os << " (" << lfc.Name << ")";
+      }
+    }
+  return os;
+}