QtVersion: Add some helper methods to query details on a Qt version

Change-Id: I7b46889a5bda280730d4585f7dc726835684db39
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qtsupport/baseqtversion.cpp

@@ -323,6 +323,41 @@ QList<ProjectExplorer::Task> BaseQtVersion::validateKit(const ProjectExplorer::K
     return result;
 }
 
+FileName BaseQtVersion::headerPath() const
+{
+    return Utils::FileName::fromUserInput(qmakeProperty("QT_INSTALL_HEADERS"));
+}
+
+FileName BaseQtVersion::libraryPath() const
+{
+    return Utils::FileName::fromUserInput(qmakeProperty("QT_INSTALL_LIBS"));
+}
+
+FileName BaseQtVersion::binPath() const
+{
+    return Utils::FileName::fromUserInput(qmakeProperty("QT_HOST_BINS"));
+}
+
+Utils::FileName QtSupport::BaseQtVersion::mkspecsPath() const
+{
+    Utils::FileName result = Utils::FileName::fromUserInput(qmakeProperty("QT_HOST_DATA"));
+    if (result.isEmpty())
+        result = Utils::FileName::fromUserInput(qmakeProperty("QMAKE_MKSPECS"));
+    else
+        result.appendPath(QLatin1String("mkspecs"));
+    return result;
+}
+
+QString QtSupport::BaseQtVersion::qtNamespace() const
+{
+    return qmakeProperty("QT_NAMESPACE");
+}
+
+QString QtSupport::BaseQtVersion::qtLibInfix() const
+{
+    return qmakeProperty("QT_LIBINFIX");
+}
+
 void BaseQtVersion::setId(int id)
 {
     m_id = id;

src/plugins/qtsupport/baseqtversion.h

@@ -191,7 +191,6 @@ public:
     static Utils::FileName mkspecDirectoryFromVersionInfo(const QHash<QString, QString> &versionInfo);
     static Utils::FileName mkspecFromVersionInfo(const QHash<QString, QString> &versionInfo);
 
-
     virtual bool supportsBinaryDebuggingHelper() const;
     virtual QString gdbDebuggingHelperLibrary() const;
     virtual QString qmlDebuggingHelperLibrary(bool debugVersion) const;
@@ -220,6 +219,14 @@ public:
 
     virtual QList<ProjectExplorer::Task> validateKit(const ProjectExplorer::Kit *k);
 
+    Utils::FileName headerPath() const;
+    Utils::FileName libraryPath() const;
+    Utils::FileName binPath() const;
+    Utils::FileName mkspecsPath() const;
+
+    QString qtNamespace() const;
+    QString qtLibInfix() const;
+
 protected:
     BaseQtVersion();
     BaseQtVersion(const Utils::FileName &path, bool isAutodetected = false, const QString &autodetectionSource = QString());