3 files changed, 42 insertions, 5 deletions

diff --git a/src/lib/corelib/generators/generatordata.cpp b/src/lib/corelib/generators/generatordata.cpp
index eb0cb2d09..e8d554d20 100644
--- a/src/lib/corelib/generators/generatordata.cpp
+++ b/src/lib/corelib/generators/generatordata.cpp
@@ -92,6 +92,29 @@ QString GeneratableProjectData::name() const
     return name;
 }
 
+CodeLocation GeneratableProjectData::location() const
+{
+    CodeLocation location;
+    QMapIterator<QString, ProjectData> it(data);
+    while (it.hasNext()) {
+        it.next();
+        CodeLocation oldLocation = location;
+        location = it.value().location();
+        if (oldLocation.isValid() && oldLocation != location)
+            throw ErrorInfo(QLatin1String("Projects with different code locations "
+                                          "per-configuration are not compatible with this "
+                                          "generator."));
+    }
+    return location;
+}
+
+GeneratableProjectData::Id GeneratableProjectData::uniqueName() const
+{
+    GeneratableProjectData::Id id;
+    id.value = name() + QLatin1Char('-') + location().toString();
+    return id;
+}
+
 QDir GeneratableProject::baseBuildDirectory() const
 {
     Internal::Set<QString> baseBuildDirectory;
diff --git a/src/lib/corelib/generators/generatordata.h b/src/lib/corelib/generators/generatordata.h
index 2c64bb370..d57f2f510 100644
--- a/src/lib/corelib/generators/generatordata.h
+++ b/src/lib/corelib/generators/generatordata.h
@@ -59,10 +59,22 @@ struct GeneratableProductData {
 };
 
 struct GeneratableProjectData {
+    struct Id {
+    private:
+        friend class GeneratableProjectData;
+        Id() { }
+        QString value;
+
+    public:
+        bool operator<(const Id &id) const { return value < id.value; }
+    };
+
     GeneratableProjectDataMap data;
     QList<GeneratableProjectData> subProjects;
     QList<GeneratableProductData> products;
     QString name() const;
+    CodeLocation location() const;
+    Id uniqueName() const;
 };
 
 struct GeneratableProject : public GeneratableProjectData {
diff --git a/src/lib/corelib/generators/visualstudio/visualstudiogenerator.cpp b/src/lib/corelib/generators/visualstudio/visualstudiogenerator.cpp
index ea621b271..179232114 100644
--- a/src/lib/corelib/generators/visualstudio/visualstudiogenerator.cpp
+++ b/src/lib/corelib/generators/visualstudio/visualstudiogenerator.cpp
@@ -79,7 +79,7 @@ public:
     QString solutionFilePath;
     QMap<QString, QSharedPointer<MSBuildProject>> msbuildProjects;
     QMap<QString, VisualStudioSolutionFileProject *> solutionProjects;
-    QMap<QString, VisualStudioSolutionFolderProject *> solutionFolders;
+    QMap<GeneratableProjectData::Id, VisualStudioSolutionFolderProject *> solutionFolders;
     QList<std::pair<QString, bool>> propertySheetNames;
 
     void reset();
@@ -118,9 +118,9 @@ public:
         // as its parent object (so skip giving it a parent folder)
         if (!parentProjectData.name().isEmpty()) {
             nestedProjects->appendProperty(
-                        generator->d->solutionFolders.value(projectData.name())->guid()
+                        generator->d->solutionFolders.value(projectData.uniqueName())->guid()
                             .toString(),
-                        generator->d->solutionFolders.value(parentProjectData.name())->guid()
+                        generator->d->solutionFolders.value(parentProjectData.uniqueName())->guid()
                             .toString());
         }
     }
@@ -138,7 +138,8 @@ public:
 
         nestedProjects->appendProperty(
                     generator->d->solutionProjects.value(productData.name())->guid().toString(),
-                    generator->d->solutionFolders.value(projectData.name())->guid().toString());
+                    generator->d->solutionFolders.value(projectData.uniqueName())->guid()
+                        .toString());
     }
 
 private:
@@ -340,7 +341,8 @@ void VisualStudioGenerator::visitProjectData(const GeneratableProject &project,
     auto solutionFolder = new VisualStudioSolutionFolderProject(d->solution.data());
     solutionFolder->setName(projectData.name());
     d->solution->appendProject(solutionFolder);
-    d->solutionFolders.insert(projectData.name(), solutionFolder);
+    QBS_CHECK(!d->solutionFolders.contains(projectData.uniqueName()));
+    d->solutionFolders.insert(projectData.uniqueName(), solutionFolder);
 }
 
 void VisualStudioGenerator::visitProduct(const GeneratableProject &project,