1 files changed, 11 insertions, 0 deletions
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index b3eb8e4..38ff3ae 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -7,6 +7,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <functional>
 #include <initializer_list>
 #include <iterator>
 #include <sstream>
@@ -3120,6 +3121,16 @@ cmGlobalGenerator::GetFilenameTargetDepends(cmSourceFile* sf) const
   return this->FilenameTargetDepends[sf];
 }
 
+const std::string& cmGlobalGenerator::GetRealPath(const std::string& dir)
+{
+  auto i = this->RealPaths.lower_bound(dir);
+  if (i == this->RealPaths.end() ||
+      this->RealPaths.key_comp()(dir, i->first)) {
+    i = this->RealPaths.emplace_hint(i, dir, cmSystemTools::GetRealPath(dir));
+  }
+  return i->second;
+}
+
 void cmGlobalGenerator::ProcessEvaluationFiles()
 {
   std::vector<std::string> generatedFiles;