cmLocalGenerator: Require a valid cmState::Snapshot in the ctor.

Refactor the local generator creation API to accept a
cmState::Snapshot.  Adjust MakeLocalGenerator to use the 'current'
snapshot in cases where there is no parent.  Create the snapshot
for subdirectories in cmMakefile::AddSubdirectory.

This means that snapshots are now created at the point of extending the tree,
as appropriate, and independently of the cmLocalGenerator and cmMakefile they
represent the state for.

1 files changed, 2 insertions, 1 deletions

diff --git a/Source/cmLocalGhsMultiGenerator.h b/Source/cmLocalGhsMultiGenerator.h
index 3157f11..f52ef39 100644
--- a/Source/cmLocalGhsMultiGenerator.h
+++ b/Source/cmLocalGhsMultiGenerator.h
@@ -25,7 +25,8 @@ class cmGeneratedFileStream;
 class cmLocalGhsMultiGenerator : public cmLocalGenerator
 {
 public:
-  cmLocalGhsMultiGenerator(cmGlobalGenerator* gg, cmLocalGenerator* parent);
+  cmLocalGhsMultiGenerator(cmGlobalGenerator* gg, cmLocalGenerator* parent,
+                           cmState::Snapshot snapshot);
 
   virtual ~cmLocalGhsMultiGenerator();