exports: accept a missing target if it is exported exactly once

If a target is exported, and a library it depends on is not part
of the same export set, before this patch cmake errored out.
With this patch, it now checks whether the missing target
is exported somewhere else exactly once, and accepts in this
case (because then it can determine the namespace for the
missing target and use this).

Alex

1 files changed, 6 insertions, 1 deletions

diff --git a/Source/cmExportFileGenerator.h b/Source/cmExportFileGenerator.h
index f271e55..c9feffd 100644
--- a/Source/cmExportFileGenerator.h
+++ b/Source/cmExportFileGenerator.h
@@ -83,7 +83,12 @@ protected:
   /** Each subclass knows how to complain about a target that is
       missing from an export set.  */
   virtual void ComplainAboutMissingTarget(cmTarget* depender,
-                                          cmTarget* dependee) = 0;
+                                          cmTarget* dependee,
+                                          int occurrences) = 0;
+
+  std::vector<std::string> FindNamespaces(cmMakefile* mf,
+                                          const std::string& name);
+
 
   // The namespace in which the exports are placed in the generated file.
   std::string Namespace;