Optionally allow IMPORTED targets to be globally visible

Consider the case motivating commit e01cce28 (Allow add_dependencies()
on imported targets, 2010-11-19).  An imported target references a file
generated at build time by a custom target on which it depends.  Had the
file been built directly using add_library or add_executable its target
name would have been visible globally.  Therefore the imported target
representing the file should be globally visible also.

Teach the IMPORTED signature of add_(executable|library) to accept a new
"GLOBAL" option to make the imported target visible globally.

1 files changed, 7 insertions, 1 deletions

diff --git a/Source/cmAddLibraryCommand.cxx b/Source/cmAddLibraryCommand.cxx
index efa29e6..9a776fb 100644
--- a/Source/cmAddLibraryCommand.cxx
+++ b/Source/cmAddLibraryCommand.cxx
@@ -31,6 +31,7 @@ bool cmAddLibraryCommand
     }
   bool excludeFromAll = false;
   bool importTarget = false;
+  bool importGlobal = false;
 
   std::vector<std::string>::const_iterator s = args.begin();
 
@@ -79,6 +80,11 @@ bool cmAddLibraryCommand
       ++s;
       importTarget = true;
       }
+    else if(importTarget && *s == "GLOBAL")
+      {
+      ++s;
+      importGlobal = true;
+      }
     else
       {
       break;
@@ -124,7 +130,7 @@ bool cmAddLibraryCommand
       }
 
     // Create the imported target.
-    this->Makefile->AddImportedTarget(libName.c_str(), type);
+    this->Makefile->AddImportedTarget(libName.c_str(), type, importGlobal);
     return true;
     }