Windows: Optionally generate DLL module definition files automatically

Create target property WINDOWS_EXPORT_ALL_SYMBOLS to automatically
generate a module definition file from MS-compatible .obj files and give
it to the linker in order to export all symbols from the .dll part of a
SHARED library.

1 files changed, 54 insertions, 0 deletions

diff --git a/Source/cmNinjaNormalTargetGenerator.cxx b/Source/cmNinjaNormalTargetGenerator.cxx
index 2fe53bf..88da09b 100644
--- a/Source/cmNinjaNormalTargetGenerator.cxx
+++ b/Source/cmNinjaNormalTargetGenerator.cxx
@@ -486,6 +486,22 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement()
                           linkPath,
                           &genTarget,
                           useWatcomQuote);
+  if(this->GetMakefile()->IsOn("CMAKE_SUPPORT_WINDOWS_EXPORT_ALL_SYMBOLS")
+     && target.GetType() == cmTarget::SHARED_LIBRARY)
+    {
+    if(target.GetPropertyAsBool("WINDOWS_EXPORT_ALL_SYMBOLS"))
+      {
+      std::string dllname = targetOutput;
+      std::string name_of_def_file
+        = target.GetSupportDirectory();
+      name_of_def_file += "/" + target.GetName();
+      name_of_def_file += ".def ";
+      vars["LINK_FLAGS"] += " /DEF:";
+      vars["LINK_FLAGS"] += this->GetLocalGenerator()
+        ->ConvertToOutputFormat(name_of_def_file.c_str(),
+                                cmLocalGenerator::SHELL);
+      }
+    }
 
   this->addPoolNinjaVariable("JOB_POOL_LINK", &target, vars);
 
@@ -600,6 +616,44 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement()
       }
     }
 
+  // maybe create .def file from list of objects
+  if (target.GetType() == cmTarget::SHARED_LIBRARY &&
+      this->GetMakefile()->IsOn("CMAKE_SUPPORT_WINDOWS_EXPORT_ALL_SYMBOLS"))
+    {
+    if(target.GetPropertyAsBool("WINDOWS_EXPORT_ALL_SYMBOLS"))
+      {
+      std::string cmakeCommand =
+      this->GetLocalGenerator()->ConvertToOutputFormat(
+        cmSystemTools::GetCMakeCommand(), cmLocalGenerator::SHELL);
+      std::string dllname = targetOutput;
+      std::string name_of_def_file
+        = target.GetSupportDirectory();
+      name_of_def_file += "/" + target.GetName();
+      name_of_def_file += ".def";
+      std::string cmd = cmakeCommand;
+      cmd += " -E __create_def ";
+      cmd += this->GetLocalGenerator()
+        ->ConvertToOutputFormat(name_of_def_file.c_str(),
+                                cmLocalGenerator::SHELL);
+      cmd += " ";
+      cmNinjaDeps objs = this->GetObjects();
+      std::string obj_list_file = name_of_def_file;
+      obj_list_file += ".objs";
+      cmd += this->GetLocalGenerator()
+        ->ConvertToOutputFormat(obj_list_file.c_str(),
+                                cmLocalGenerator::SHELL);
+      preLinkCmdLines.push_back(cmd);
+      // create a list of obj files for the -E __create_def to read
+      cmGeneratedFileStream fout(obj_list_file.c_str());
+      for(cmNinjaDeps::iterator i=objs.begin(); i != objs.end(); ++i)
+        {
+        if(cmHasLiteralSuffix(*i, ".obj"))
+          {
+          fout << *i << "\n";
+          }
+        }
+      }
+    }
   // If we have any PRE_LINK commands, we need to go back to HOME_OUTPUT for
   // the link commands.
   if (!preLinkCmdLines.empty())