1 files changed, 9 insertions, 0 deletions
diff --git a/Source/cmExportCommand.cxx b/Source/cmExportCommand.cxx
index 198874e..4071f99 100644
--- a/Source/cmExportCommand.cxx
+++ b/Source/cmExportCommand.cxx
@@ -14,6 +14,7 @@
 
 #include "cmArgumentParser.h"
 #include "cmExecutionStatus.h"
+#include "cmExperimental.h"
 #include "cmExportBuildAndroidMKGenerator.h"
 #include "cmExportBuildFileGenerator.h"
 #include "cmExportSet.h"
@@ -61,6 +62,7 @@ bool cmExportCommand(std::vector<std::string> const& args,
     std::string Namespace;
     std::string Filename;
     std::string AndroidMKFile;
+    std::string CxxModulesDirectory;
     bool Append = false;
     bool ExportOld = false;
   };
@@ -69,6 +71,12 @@ bool cmExportCommand(std::vector<std::string> const& args,
                   .Bind("NAMESPACE"_s, &Arguments::Namespace)
                   .Bind("FILE"_s, &Arguments::Filename);
 
+  bool const supportCxx20FileSetTypes = cmExperimental::HasSupportEnabled(
+    status.GetMakefile(), cmExperimental::Feature::CxxModuleCMakeApi);
+  if (supportCxx20FileSetTypes) {
+    parser.Bind("CXX_MODULES_DIRECTORY"_s, &Arguments::CxxModulesDirectory);
+  }
+
   if (args[0] == "EXPORT") {
     parser.Bind("EXPORT"_s, &Arguments::ExportSetName);
   } else {
@@ -211,6 +219,7 @@ bool cmExportCommand(std::vector<std::string> const& args,
   }
   ebfg->SetExportFile(fname.c_str());
   ebfg->SetNamespace(arguments.Namespace);
+  ebfg->SetCxxModuleDirectory(arguments.CxxModulesDirectory);
   ebfg->SetAppendMode(arguments.Append);
   if (exportSet != nullptr) {
     ebfg->SetExportSet(exportSet);