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, 4 insertions, 0 deletions

diff --git a/Source/cmListFileCache.h b/Source/cmListFileCache.h
index 18ec0df..b5d8a05 100644
--- a/Source/cmListFileCache.h
+++ b/Source/cmListFileCache.h
@@ -57,11 +57,15 @@ struct cmListFileContext
   long Line;
 };
 
+std::ostream& operator<<(std::ostream&, cmListFileContext const&);
+
 struct cmListFileFunction: public cmListFileContext
 {
   std::vector<cmListFileArgument> Arguments;
 };
 
+class cmListFileBacktrace: public std::vector<cmListFileContext> {};
+
 struct cmListFile
 {
   cmListFile()