Ensure imported targets in sibling dirs are deduplicated

Fixes: #26284

Source/cmComputeLinkDepends.cxx

@@ -33,6 +33,7 @@
 #include "cmState.h"
 #include "cmStateTypes.h"
 #include "cmStringAlgorithms.h"
+#include "cmSystemTools.h"
 #include "cmTarget.h"
 #include "cmValue.h"
 #include "cmake.h"
@@ -540,7 +541,22 @@ private:
   {
     for (auto index : libEntries) {
       LinkEntry const& entry = this->Entries[index];
-      if (this->IncludeEntry(entry) || this->Emitted.insert(index).second) {
+      if (this->IncludeEntry(entry)) {
+        this->FinalEntries.emplace_back(entry);
+        continue;
+      }
+      if (entry.Target && entry.Target->IsImported()) {
+        // Different imported targets can point to the same library so check
+        // also library paths
+        if (this->Emitted.insert(index).second &&
+            this->ImportedEmitted
+              .insert(cmSystemTools::GetRealPath(entry.Item.Value))
+              .second) {
+          this->FinalEntries.emplace_back(entry);
+        }
+        continue;
+      }
+      if (this->Emitted.insert(index).second) {
         this->FinalEntries.emplace_back(entry);
       }
     }
@@ -553,6 +569,7 @@ private:
   EntryVector& Entries;
   EntryVector& FinalEntries;
   std::set<size_t> Emitted;
+  std::set<std::string> ImportedEmitted;
   const std::map<size_t, std::vector<size_t>>* Groups = nullptr;
 };
 }