diff --git a/gui/gui.pro b/gui/gui.pro
index 44f850a96..78d3feeab 100644
--- a/gui/gui.pro
+++ b/gui/gui.pro
@@ -145,3 +145,9 @@ win32 {
     HEADERS += ../lib/version.h
     LIBS += -lshlwapi
 }
+
+
+# CFGDIR=xyz
+contains(CFGDIR, .+) {
+    DEFINES += CFGDIR=\\\"$${CFGDIR}\\\"
+}
diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index 3959385f8..234d0aebe 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -512,6 +512,31 @@ void MainWindow::AddIncludeDirs(const QStringList &includeDirs, Settings &result
     }
 }
 
+bool MainWindow::LoadLibrary(Library *library, QString filename)
+{
+    // Try to load the library from the project folder..
+    if (mProject) {
+        QString path = QFileInfo(mProject->GetProjectFile()->GetFilename()).canonicalPath();
+        if (library->load(NULL, (path+"/"+filename).toLatin1()))
+            return true;
+    }
+
+    if (Library::cfgdir() && library->load(NULL, (Library::cfgdir()+('/'+filename)).toLatin1()))
+        return true;
+
+    // Try to load the library from the application folder..
+    QString path = QFileInfo(QCoreApplication::applicationFilePath()).canonicalPath();
+    if (library->load(NULL, (path+"/"+filename).toLatin1()))
+        return true;
+
+    // Try to load the library from the cfg subfolder..
+    path = path + "/cfg";
+    if (library->load(NULL, (path+"/"+filename).toLatin1()))
+        return true;
+
+    return false;
+}
+
 Settings MainWindow::GetCppcheckSettings()
 {
     Settings result;
@@ -533,23 +558,8 @@ Settings MainWindow::GetCppcheckSettings()
         QStringList libraries = pfile->GetLibraries();
         foreach(QString library, libraries) {
             const QString filename = library + ".cfg";
-
-            // Try to load the library from the project folder..
-            QString path = QFileInfo(pfile->GetFilename()).canonicalPath();
-            if (result.library.load("", (path+"/"+filename).toLatin1()))
-                continue;
-
-            // Try to load the library from the application folder..
-            path = QFileInfo(QCoreApplication::applicationFilePath()).canonicalPath();
-            if (result.library.load("", (path+"/"+filename).toLatin1()))
-                continue;
-
-            // Try to load the library from the cfg subfolder..
-            path = path + "/cfg";
-            if (result.library.load("", (path+"/"+filename).toLatin1()))
-                continue;
-
-            QMessageBox::information(this, tr("Information"), tr("Failed to load the selected library %1").arg(filename));
+            if (!LoadLibrary(&result.library, filename))
+                QMessageBox::information(this, tr("Information"), tr("Failed to load the selected library %1").arg(filename));
         }
 
         // Only check the given -D configuration
@@ -586,11 +596,10 @@ Settings MainWindow::GetCppcheckSettings()
     result.standards.c = mSettings->value(SETTINGS_STD_C99, true).toBool() ? Standards::C99 : (mSettings->value(SETTINGS_STD_C11, false).toBool() ? Standards::C11 : Standards::C89);
     result.standards.posix = mSettings->value(SETTINGS_STD_POSIX, false).toBool();
 
-    const QString applicationFilePath = QCoreApplication::applicationFilePath();
-    bool std = result.library.load(applicationFilePath.toLatin1(), "std.cfg");
+    bool std = LoadLibrary(&result.library, "std.cfg");
     bool posix = true;
     if (result.standards.posix)
-        posix = result.library.load(applicationFilePath.toLatin1(), "posix.cfg");
+        posix = LoadLibrary(&result.library, "posix.cfg");
 
     if (!std || !posix)
         QMessageBox::warning(this, tr("Error"), tr("Failed to load %1. Your Cppcheck installation is broken.").arg(!std ? "std.cfg" : "posix.cfg"));
diff --git a/gui/mainwindow.h b/gui/mainwindow.h
index d6bf7ac69..3ecfca49a 100644
--- a/gui/mainwindow.h
+++ b/gui/mainwindow.h
@@ -424,6 +424,14 @@ private:
     */
     void LoadProjectFile(const QString &filePath);
 
+    /**
+     * @brief Load library file
+     * @param Library  library to use
+     * @param filename filename (no path)
+     * @return True if successful
+     */
+    bool LoadLibrary(Library *library, QString filename);
+
     /**
     * @brief Update project MRU items in File-menu.
     */
diff --git a/gui/projectfiledialog.cpp b/gui/projectfiledialog.cpp
index bde3aee19..f138c0023 100644
--- a/gui/projectfiledialog.cpp
+++ b/gui/projectfiledialog.cpp
@@ -26,6 +26,7 @@
 #include <QSettings>
 #include "common.h"
 #include "projectfiledialog.h"
+#include "library.h"
 
 ProjectFileDialog::ProjectFileDialog(const QString &path, QWidget *parent)
     : QDialog(parent)
@@ -42,23 +43,33 @@ ProjectFileDialog::ProjectFileDialog(const QString &path, QWidget *parent)
     // Checkboxes for the libraries..
     const QString applicationFilePath = QCoreApplication::applicationFilePath();
     const QString appPath = QFileInfo(applicationFilePath).canonicalPath();
-    const QString searchPaths[] = { appPath, appPath + "/cfg", inf.canonicalPath() };
-    for (int i = 0; i < 3; i++) {
-        QDir dir(searchPaths[i]);
+    QStringList searchPaths;
+    if (Library::cfgdir())
+        searchPaths << Library::cfgdir();
+    searchPaths << inf.canonicalPath();
+    searchPaths << appPath;
+    searchPaths << (appPath + "/cfg");
+    QStringList libraries;
+    foreach(const QString path, searchPaths) {
+        QDir dir(path);
         dir.setSorting(QDir::Name);
         dir.setNameFilters(QStringList("*.cfg"));
         dir.setFilter(QDir::Files | QDir::NoDotAndDotDot);
         foreach(QFileInfo item, dir.entryInfoList()) {
-            QString library = item.fileName();
-            library.chop(4);
-            if (library.compare("std", Qt::CaseInsensitive) == 0)
-                continue;
-            QCheckBox *checkbox = new QCheckBox(this);
-            checkbox->setText(library);
-            mUI.librariesLayout->addWidget(checkbox);
-            mLibraryCheckboxes << checkbox;
+            libraries << item.fileName();
         }
     }
+    libraries.removeDuplicates();
+    libraries.sort();
+    foreach(QString library, libraries) {
+        library.chop(4);
+        if (library.compare("std", Qt::CaseInsensitive) == 0)
+            continue;
+        QCheckBox *checkbox = new QCheckBox(this);
+        checkbox->setText(library);
+        mUI.librariesLayout->addWidget(checkbox);
+        mLibraryCheckboxes << checkbox;
+    }
 
     connect(mUI.mButtons, SIGNAL(accepted()), this, SLOT(accept()));
     connect(mUI.mBtnAddInclude, SIGNAL(clicked()), this, SLOT(AddIncludeDir()));
diff --git a/lib/library.h b/lib/library.h
index 36ce11978..88454b60c 100644
--- a/lib/library.h
+++ b/lib/library.h
@@ -44,6 +44,15 @@ class CPPCHECKLIB Library {
 public:
     Library();
 
+    /** return cfgdir or NULL */
+    static const char *cfgdir() {
+#ifdef CFGDIR
+        return CFGDIR;
+#else
+        return NULL;
+#endif
+    }
+
     bool load(const char exename [], const char path []);
     bool load(const tinyxml2::XMLDocument &doc);