install: Disallow installing export() result.

1 files changed, 41 insertions, 0 deletions

diff --git a/Source/cmInstallCommand.cxx b/Source/cmInstallCommand.cxx
index 24de1b5..899b088 100644
--- a/Source/cmInstallCommand.cxx
+++ b/Source/cmInstallCommand.cxx
@@ -871,6 +871,47 @@ bool cmInstallCommand::HandleFilesMode(std::vector<std::string> const& args)
     return false;
     }
 
+  cmPolicies::PolicyStatus status =
+      this->Makefile->GetPolicyStatus(cmPolicies::CMP0062);
+
+  cmGlobalGenerator *gg = this->Makefile->GetGlobalGenerator();
+  for(std::vector<std::string>::const_iterator fileIt = filesVector.begin();
+      fileIt != filesVector.end(); ++fileIt)
+    {
+    if (gg->IsExportedTargetsFile(*fileIt))
+      {
+      const char *modal = 0;
+      std::ostringstream e;
+      cmake::MessageType messageType = cmake::AUTHOR_WARNING;
+
+      switch(status)
+        {
+        case cmPolicies::WARN:
+          e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0062) << "\n";
+          modal = "should";
+        case cmPolicies::OLD:
+          break;
+        case cmPolicies::REQUIRED_IF_USED:
+        case cmPolicies::REQUIRED_ALWAYS:
+        case cmPolicies::NEW:
+          modal = "may";
+          messageType = cmake::FATAL_ERROR;
+        }
+      if (modal)
+        {
+        e << "The file\n  " << *fileIt << "\nwas generated by the export() "
+          "command.  It " << modal << " not be installed with the "
+          "install() command.  Use the install(EXPORT) mechanism "
+          "instead.  See the cmake-packages(7) manual for more.\n";
+        this->Makefile->IssueMessage(messageType, e.str());
+        if (messageType == cmake::FATAL_ERROR)
+          {
+          return false;
+          }
+        }
+      }
+    }
+
   if (!ica.Finalize())
     {
     return false;