2 files changed, 25 insertions, 0 deletions
diff --git a/Source/cmVisualStudio10TargetGenerator.cxx b/Source/cmVisualStudio10TargetGenerator.cxx
index 7975018..33152f2 100644
--- a/Source/cmVisualStudio10TargetGenerator.cxx
+++ b/Source/cmVisualStudio10TargetGenerator.cxx
@@ -793,6 +793,7 @@ void cmVisualStudio10TargetGenerator::WriteClassicMsBuildProjectFile(
     Elem(e0, "PropertyGroup").Attribute("Label", "UserMacros");
     this->WriteWinRTPackageCertificateKeyFile(e0);
     this->WritePathAndIncrementalLinkOptions(e0);
+    this->WritePublicProjectContentOptions(e0);
     this->WriteCEDebugProjectConfigurationValues(e0);
     this->WriteItemDefinitionGroups(e0);
     this->WriteCustomCommands(e0);
@@ -3115,6 +3116,29 @@ void cmVisualStudio10TargetGenerator::WritePathAndIncrementalLinkOptions(
   }
 }
 
+void cmVisualStudio10TargetGenerator::WritePublicProjectContentOptions(
+  Elem& e0)
+{
+  cmStateEnums::TargetType ttype = this->GeneratorTarget->GetType();
+  if (ttype != cmStateEnums::SHARED_LIBRARY) {
+    return;
+  }
+  if (this->ProjectType != VsProjectType::vcxproj) {
+    return;
+  }
+
+  Elem e1(e0, "PropertyGroup");
+  for (std::string const& config : this->Configurations) {
+    if (this->GeneratorTarget->HaveCxx20ModuleSources() &&
+        this->GeneratorTarget->HaveCxxModuleSupport(config) ==
+          cmGeneratorTarget::Cxx20SupportLevel::Supported) {
+      const std::string cond = this->CalcCondition(config);
+      // For DLL projects, we export all BMIs for now
+      e1.WritePlatformConfigTag("AllProjectBMIsArePublic", cond, "true");
+    }
+  }
+}
+
 void cmVisualStudio10TargetGenerator::OutputLinkIncremental(
   Elem& e1, std::string const& configName)
 {
diff --git a/Source/cmVisualStudio10TargetGenerator.h b/Source/cmVisualStudio10TargetGenerator.h
index a87cb01..ffab91f 100644
--- a/Source/cmVisualStudio10TargetGenerator.h
+++ b/Source/cmVisualStudio10TargetGenerator.h
@@ -97,6 +97,7 @@ private:
   void WriteWinRTPackageCertificateKeyFile(Elem& e0);
   void WriteXamlFilesGroup(Elem& e0);
   void WritePathAndIncrementalLinkOptions(Elem& e0);
+  void WritePublicProjectContentOptions(Elem& e0);
   void WriteItemDefinitionGroups(Elem& e0);
   void VerifyNecessaryFiles();
   void WriteMissingFiles(Elem& e1);