install,export: Maybe transform OBJECT libraries to INTERFACE libraries

Teach the `install` and `export` commands to support installing and
exporting `OBJECT` libraries without their object files.  Transform
them to `INTERFACE` libraries in such cases.

For `install(TARGETS)`, activate this when no destination for the object
files is specified.  For `export`, activate this only under Xcode with
multiple architectures when we have no well-defined object file
locations to give to clients.

1 files changed, 0 insertions, 11 deletions

diff --git a/Source/cmExportCommand.cxx b/Source/cmExportCommand.cxx
index c8a727d..655ebe8 100644
--- a/Source/cmExportCommand.cxx
+++ b/Source/cmExportCommand.cxx
@@ -146,17 +146,6 @@ bool cmExportCommand::InitialPass(std::vector<std::string> const& args,
       }
 
       if (cmTarget* target = gg->FindTarget(currentTarget)) {
-        if (target->GetType() == cmStateEnums::OBJECT_LIBRARY) {
-          std::string reason;
-          if (!this->Makefile->GetGlobalGenerator()
-                 ->HasKnownObjectFileLocation(&reason)) {
-            std::ostringstream e;
-            e << "given OBJECT library \"" << currentTarget
-              << "\" which may not be exported" << reason << ".";
-            this->SetError(e.str());
-            return false;
-          }
-        }
         if (target->GetType() == cmStateEnums::UTILITY) {
           this->SetError("given custom target \"" + currentTarget +
                          "\" which may not be exported.");