cmTarget: Add method to lookup other targets in a target's scope

Move the main implementation of cmComputeLinkDepends::FindTargetToLink
into cmTarget.

1 files changed, 31 insertions, 0 deletions

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 4ef481a..9a6c93c 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -6681,6 +6681,37 @@ cmTarget::ComputeLinkImplementationLanguages(const std::string& config,
 }
 
 //----------------------------------------------------------------------------
+cmTarget const* cmTarget::FindTargetToLink(std::string const& name) const
+{
+  cmTarget const* tgt = this->Makefile->FindTargetToUse(name);
+
+  // Skip targets that will not really be linked.  This is probably a
+  // name conflict between an external library and an executable
+  // within the project.
+  if(tgt && tgt->GetType() == cmTarget::EXECUTABLE &&
+     !tgt->IsExecutableWithExports())
+    {
+    tgt = 0;
+    }
+
+  if(tgt && tgt->GetType() == cmTarget::OBJECT_LIBRARY)
+    {
+    cmOStringStream e;
+    e << "Target \"" << this->GetName() << "\" links to "
+      "OBJECT library \"" << tgt->GetName() << "\" but this is not "
+      "allowed.  "
+      "One may link only to STATIC or SHARED libraries, or to executables "
+      "with the ENABLE_EXPORTS property set.";
+    cmake* cm = this->Makefile->GetCMakeInstance();
+    cm->IssueMessage(cmake::FATAL_ERROR, e.str(), this->GetBacktrace());
+    tgt = 0;
+    }
+
+  // Return the target found, if any.
+  return tgt;
+}
+
+//----------------------------------------------------------------------------
 std::string cmTarget::CheckCMP0004(std::string const& item) const
 {
   // Strip whitespace off the library names because we used to do this