Graphviz: add missing support for circular dependencies

This support was actually added by removing a superfluous check that was
too eager in cmLinkItemGraphVisitor.cxx.

Extended the existing Graphviz tests to include this particular case,
and re-generated the expected output files.

Fixes: #20720

18 files changed, 286 insertions, 234 deletions

diff --git a/Source/cmLinkItemGraphVisitor.cxx b/Source/cmLinkItemGraphVisitor.cxx
index acc23c8..b13def8 100644
--- a/Source/cmLinkItemGraphVisitor.cxx
+++ b/Source/cmLinkItemGraphVisitor.cxx
@@ -24,10 +24,6 @@ void cmLinkItemGraphVisitor::VisitItem(cmLinkItem const& item)
 void cmLinkItemGraphVisitor::VisitLinks(cmLinkItem const& item,
                                         cmLinkItem const& rootItem)
 {
-  if (this->LinkVisited(item, rootItem)) {
-    return;
-  }
-
   if (item.Target == nullptr) {
     return;
   }
diff --git a/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake b/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
index 10cd2bc..4ce6b5c 100644
--- a/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
+++ b/Tests/RunCMake/Graphviz/GraphvizTestProject.cmake
@@ -9,6 +9,7 @@
 #   - All library depend on a common INTERFACE library holding compiler flags
 #   - We have a custom target to generate a man page
 #   - Someone has added an UNKNOWN, IMPORTED crypto mining library!
+#   - We have a circular dependency between two libraries
 
 add_subdirectory(test_project/third_party_project)
 
@@ -23,6 +24,13 @@ target_link_libraries(CoreLibrary PUBLIC CompilerFlags)
 
 target_link_libraries(CoreLibrary PRIVATE SeriousLoggingLibrary)
 
+add_library(SystemLibrary STATIC test_project/system_library.c)
+
+# Create a circular dependency.
+# See https://gitlab.kitware.com/cmake/cmake/issues/20720
+target_link_libraries(CoreLibrary PRIVATE SystemLibrary)
+target_link_libraries(SystemLibrary PRIVATE CoreLibrary)
+
 add_library(GraphicLibraryObjects OBJECT test_project/graphic_library.c)
 
 add_library(GraphicLibrary SHARED)
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
index 8b0365a..31d88df 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_custom_targets.dot
@@ -28,25 +28,28 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GenerateManPage", shape = box ];
-    "node1" -> "node5"  // ConsoleApplication -> GenerateManPage
-    "node6" [ label = "GraphicApplication", shape = egg ];
-    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node8" [ label = "\"-lm\"", shape = septagon ];
-    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GenerateManPage", shape = box ];
+    "node1" -> "node6"  // ConsoleApplication -> GenerateManPage
+    "node7" [ label = "GraphicApplication", shape = egg ];
+    "node7" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node8" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node9" [ label = "\"-lm\"", shape = septagon ];
+    "node8" -> "node9" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node8" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node8" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node10" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node8" -> "node10" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node7" -> "node8" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node11" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node12" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node12" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node12" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
index 1bbf25a..26f2f64 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_default_options.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
index 1bbf25a..26f2f64 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_dependers_files.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_executables.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_executables.dot
index 558a470..7f2e01c 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_executables.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_executables.dot
@@ -27,18 +27,21 @@ subgraph clusterLegend {
     "node1" -> "node0"  // CoreLibrary -> CompilerFlags
     "node2" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node1" -> "node2" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
-    "node3" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node4" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node5" [ label = "\"-lm\"", shape = septagon ];
-    "node4" -> "node5" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node4" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node4" -> "node1" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node6" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node4" -> "node6" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node7" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node7" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node7" -> "node1" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node8" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node8" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node8" -> "node1" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node3" [ label = "SystemLibrary", shape = octagon ];
+    "node3" -> "node1" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node1" -> "node3" [ style = dotted ] // CoreLibrary -> SystemLibrary
+    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node5" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node6" [ label = "\"-lm\"", shape = septagon ];
+    "node5" -> "node6" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node5" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node5" -> "node1" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node7" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node5" -> "node7" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node8" -> "node1" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node9" -> "node1" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
index 660af37..db675a8 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_external_libs.dot
@@ -28,19 +28,22 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "GraphicApplication", shape = egg ];
-    "node4" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node5" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node5" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node5" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node6" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node5" -> "node6" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node4" -> "node5" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node7" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node7" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node7" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node8" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node8" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node8" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "GraphicApplication", shape = egg ];
+    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node7" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node8" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node9" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
index 5af7fec..234ee39 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_graphic_libs.dot
@@ -28,8 +28,11 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "\"-lm\"", shape = septagon ];
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "\"-lm\"", shape = septagon ];
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
index 94ec41c..6dea88c 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_interface_libs.dot
@@ -24,20 +24,23 @@ subgraph clusterLegend {
 }
     "node0" [ label = "ConsoleApplication", shape = egg ];
     "node1" [ label = "CoreLibrary", shape = octagon ];
+    "node2" [ label = "SystemLibrary", shape = octagon ];
+    "node2" -> "node1" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node1" -> "node2" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node0" -> "node1" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node2" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node0" -> "node2" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node3" [ label = "GraphicApplication", shape = egg ];
-    "node3" -> "node1" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node4" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node5" [ label = "\"-lm\"", shape = septagon ];
-    "node4" -> "node5" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node4" -> "node1" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node6" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node4" -> "node6" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node3" -> "node4" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node7" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node7" -> "node1" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node8" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node8" -> "node1" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node3" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node0" -> "node3" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node4" [ label = "GraphicApplication", shape = egg ];
+    "node4" -> "node1" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node5" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node6" [ label = "\"-lm\"", shape = septagon ];
+    "node5" -> "node6" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node5" -> "node1" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node7" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node5" -> "node7" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node4" -> "node5" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node8" -> "node1" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node9" -> "node1" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
index 65b7a71..df3d10a 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_module_libs.dot
@@ -28,17 +28,20 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
index 8116bc9..8f832a8 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_object_libs.dot
@@ -28,21 +28,24 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node8" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
index 1bbf25a..26f2f64 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_per_target_files.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
index 439d1f7..e127daa 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_shared_libs.dot
@@ -28,17 +28,20 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "\"-lm\"", shape = septagon ];
-    "node7" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node8" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "\"-lm\"", shape = septagon ];
+    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
index 1be6550..4f242bb 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_no_unknown_libs.dot
@@ -28,21 +28,24 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "GraphicApplication", shape = egg ];
-    "node4" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node5" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node6" [ label = "\"-lm\"", shape = septagon ];
-    "node5" -> "node6" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node5" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node5" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node7" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node5" -> "node7" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node4" -> "node5" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node8" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node8" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node8" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node9" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "GraphicApplication", shape = egg ];
+    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node7" [ label = "\"-lm\"", shape = septagon ];
+    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
index 1cfbe0f..c664af8 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_header.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
index 9653c33..5579306 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_graph_name.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "node2" -> "node0"  // CoreLibrary -> CompilerFlags
     "node3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "node2" -> "node3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "node4" [ label = "SystemLibrary", shape = octagon ];
+    "node4" -> "node2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "node2" -> "node4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "node1" -> "node2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "node4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "node1" -> "node4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "node5" [ label = "GraphicApplication", shape = egg ];
-    "node5" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "node6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "node7" [ label = "\"-lm\"", shape = septagon ];
-    "node6" -> "node7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "node6" -> "node0"  // GraphicLibrary -> CompilerFlags
-    "node6" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "node8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "node6" -> "node8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "node5" -> "node6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "node9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "node9" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "node9" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "node10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "node10" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "node10" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "node5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "node1" -> "node5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "node6" [ label = "GraphicApplication", shape = egg ];
+    "node6" -> "node2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "node7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "node8" [ label = "\"-lm\"", shape = septagon ];
+    "node7" -> "node8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "node7" -> "node0"  // GraphicLibrary -> CompilerFlags
+    "node7" -> "node2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "node9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "node7" -> "node9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "node6" -> "node7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "node10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "node10" -> "node0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "node10" -> "node2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "node11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "node11" -> "node0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "node11" -> "node2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
index 82d96d0..3bf20ec 100644
--- a/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
+++ b/Tests/RunCMake/Graphviz/expected_outputs/dependency_graph_set_node_prefix.dot
@@ -28,23 +28,26 @@ subgraph clusterLegend {
     "point2" -> "point0"  // CoreLibrary -> CompilerFlags
     "point3" [ label = "GoofyLoggingLibrary\n(SeriousLoggingLibrary)\n(TheBestLoggingLibrary)", shape = pentagon ];
     "point2" -> "point3" [ style = dotted ] // CoreLibrary -> GoofyLoggingLibrary
+    "point4" [ label = "SystemLibrary", shape = octagon ];
+    "point4" -> "point2" [ style = dotted ] // SystemLibrary -> CoreLibrary
+    "point2" -> "point4" [ style = dotted ] // CoreLibrary -> SystemLibrary
     "point1" -> "point2" [ style = dotted ] // ConsoleApplication -> CoreLibrary
-    "point4" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
-    "point1" -> "point4" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
-    "point5" [ label = "GraphicApplication", shape = egg ];
-    "point5" -> "point2" [ style = dotted ] // GraphicApplication -> CoreLibrary
-    "point6" [ label = "GraphicLibrary", shape = doubleoctagon ];
-    "point7" [ label = "\"-lm\"", shape = septagon ];
-    "point6" -> "point7" [ style = dotted ] // GraphicLibrary -> "-lm"
-    "point6" -> "point0"  // GraphicLibrary -> CompilerFlags
-    "point6" -> "point2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
-    "point8" [ label = "GraphicLibraryObjects", shape = hexagon ];
-    "point6" -> "point8" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
-    "point5" -> "point6" [ style = dotted ] // GraphicApplication -> GraphicLibrary
-    "point9" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
-    "point9" -> "point0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
-    "point9" -> "point2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
-    "point10" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
-    "point10" -> "point0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
-    "point10" -> "point2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
+    "point5" [ label = "CryptoCurrencyMiningLibrary", shape = septagon ];
+    "point1" -> "point5" [ style = dotted ] // ConsoleApplication -> CryptoCurrencyMiningLibrary
+    "point6" [ label = "GraphicApplication", shape = egg ];
+    "point6" -> "point2" [ style = dotted ] // GraphicApplication -> CoreLibrary
+    "point7" [ label = "GraphicLibrary", shape = doubleoctagon ];
+    "point8" [ label = "\"-lm\"", shape = septagon ];
+    "point7" -> "point8" [ style = dotted ] // GraphicLibrary -> "-lm"
+    "point7" -> "point0"  // GraphicLibrary -> CompilerFlags
+    "point7" -> "point2" [ style = dotted ] // GraphicLibrary -> CoreLibrary
+    "point9" [ label = "GraphicLibraryObjects", shape = hexagon ];
+    "point7" -> "point9" [ style = dotted ] // GraphicLibrary -> GraphicLibraryObjects
+    "point6" -> "point7" [ style = dotted ] // GraphicApplication -> GraphicLibrary
+    "point10" [ label = "GraphicDriverOpenGL", shape = tripleoctagon ];
+    "point10" -> "point0" [ style = dotted ] // GraphicDriverOpenGL -> CompilerFlags
+    "point10" -> "point2" [ style = dotted ] // GraphicDriverOpenGL -> CoreLibrary
+    "point11" [ label = "GraphicDriverVulkan", shape = tripleoctagon ];
+    "point11" -> "point0" [ style = dotted ] // GraphicDriverVulkan -> CompilerFlags
+    "point11" -> "point2" [ style = dotted ] // GraphicDriverVulkan -> CoreLibrary
 }
diff --git a/Tests/RunCMake/Graphviz/test_project/system_library.c b/Tests/RunCMake/Graphviz/test_project/system_library.c
new file mode 100644
index 0000000..5d67079
--- /dev/null
+++ b/Tests/RunCMake/Graphviz/test_project/system_library.c
@@ -0,0 +1,3 @@
+void initialize_system()
+{
+}