diff --git a/soltools/mkdepend/collectdircontent.cxx b/soltools/mkdepend/collectdircontent.cxx
new file mode 100755
index 000000000000..50da374841cd
--- /dev/null
+++ b/soltools/mkdepend/collectdircontent.cxx
@@ -0,0 +1,79 @@
+#include  "collectdircontent.hxx"
+
+PathFilePair IncludesCollection::split_path(const string& filePath) {
+    string sepU = "/";
+    string sepW = "\\";
+    string::size_type pos = filePath.rfind (sepU);
+    string::size_type posW = filePath.rfind (sepW);
+    if ((posW != string::npos) && ((posW > pos) || (pos == string::npos))) pos = posW;
+    if (pos != string::npos) {
+        string dirName = filePath.substr(0, pos);
+        return PathFilePair(dirName, filePath.substr(pos + 1, filePath.length()));
+    } else
+        return PathFilePair(".", filePath);
+};
+
+void IncludesCollection::add_to_collection(const string& dirPath) {
+    DirContent dirContent;
+#if defined( WNT )
+    WIN32_FIND_DATA FindFileData;
+    HANDLE hFind;
+    hFind = FindFirstFile((dirPath + "\\*").c_str(), &FindFileData);
+    if (hFind == INVALID_HANDLE_VALUE) {
+        // Invalid File Handle - no need to try it anymore
+        allIncludes.insert(EntriesPair(dirPath, DirContent()));
+        return;
+    };
+    do {
+        string winFileName(FindFileData.cFileName);
+        transform(winFileName.begin(), winFileName.end(), winFileName.begin(), tolower);
+        dirContent.insert(winFileName);
+    } while (FindNextFile(hFind, &FindFileData));
+#else
+    DIR *pdir;
+    dirent *pent;
+    pdir = opendir(dirPath.c_str()); //"." refers to the current dir
+    if (!pdir) {
+        // Invalid File Handle - no need to try it anymore
+        allIncludes.insert(EntriesPair(dirPath, DirContent()));
+        return;
+    }
+    while ((pent = readdir(pdir))) {
+        dirContent.insert(pent->d_name);
+    };
+#endif // defined( WNT )
+    allIncludes.insert(EntriesPair(dirPath, dirContent));
+};
+
+bool IncludesCollection::exists(string filePath) {
+#if defined( WNT )
+    transform(filePath.begin(), filePath.end(), filePath.begin(), tolower);
+#endif // defined( WNT )
+    PathFilePair dirFile = split_path(filePath);
+    string dirPath = dirFile.first;
+    string fileName = dirFile.second;
+    DirMap::iterator mapIter = allIncludes.find(dirPath);
+    if (mapIter == allIncludes.end()) {
+        add_to_collection(dirPath);
+        mapIter = allIncludes.find(dirPath);
+    };
+    DirContent dirContent = (*mapIter).second;
+    DirContent::iterator dirIter = dirContent.find(fileName);
+    if (dirIter == dirContent.end()) {
+        return false;
+    } else {
+        return true;
+    };
+    return false;
+};
+
+extern "C" {
+
+    IncludesCollection * create_IncludesCollection() {
+            return new IncludesCollection;
+    }
+
+    int call_IncludesCollection_exists(IncludesCollection* m, const char * filePath) {
+        return m->exists(filePath);
+    }
+}