VS: Generate a custom command only in the least dependent target

If a custom command is assigned to multiple targets, generate the build
rule only in the least-dependent `.vcxproj` file.  Otherwise MSBuild
will run the command on the first build of a dependent target even if
its dependencies already brought the command up to date (in order to
populates its build log).

Generate targets in least-to-most-dependent order, and assign a custom
command to the least dependent target.

Added cmLocalVisualStudio10Generator::GenerateTargetsDepthFirst to call
cmVisualStudio10TargetGenerator::Generate in least-dependent order.

Moved SourcesVisited from cmVisualStudio10TargetGenerator to
cmLocalVisualStudio10Generator to avoid attaching a custom command to
multiple targets among the local generator.

Fixes: #16767

1 files changed, 0 insertions, 1 deletions

diff --git a/Source/cmVisualStudio10TargetGenerator.h b/Source/cmVisualStudio10TargetGenerator.h
index 53334bb..bbe3f7f 100644
--- a/Source/cmVisualStudio10TargetGenerator.h
+++ b/Source/cmVisualStudio10TargetGenerator.h
@@ -209,7 +209,6 @@ private:
   cmGlobalVisualStudio10Generator* const GlobalGenerator;
   cmGeneratedFileStream* BuildFileStream;
   cmLocalVisualStudio10Generator* const LocalGenerator;
-  std::set<cmSourceFile const*> SourcesVisited;
   std::set<std::string> CSharpCustomCommandNames;
   bool IsMissingFiles;
   std::vector<std::string> AddedFiles;