Fixes: try __dlopen and dlopen to make systems like CentOS 4.6 happy

Task:   Message-ID: <b3dce35e57024e108c753d6fe40fdc23@7e24035161164d75927b8103ef1a2cdf> @qt-creator

src/plugins/debugger/debuggerplugin.cpp

@@ -63,10 +63,10 @@
 #include <utils/qtcassert.h>
 
 #include <QtCore/QDebug>
-#include <QtCore/qplugin.h>
 #include <QtCore/QObject>
 #include <QtCore/QPoint>
 #include <QtCore/QSettings>
+#include <QtCore/QtPlugin>
 
 #include <QtGui/QPlainTextEdit>
 #include <QtGui/QTextBlock>

src/plugins/debugger/gdbengine.cpp

@@ -3945,7 +3945,9 @@ void GdbEngine::tryLoadCustomDumpers()
         if (qq->useFastStart())
             sendCommand("set stop-on-solib-events 0");
         QString flag = QString::number(RTLD_NOW);
-        sendCommand("call dlopen(\"" + lib + "\", " + flag + ")");
+        sendCommand("call (void)dlopen(\"" + lib + "\", " + flag + ")");
+        // some older systems like CentOS 4.6 prefer this:
+        sendCommand("call (void)__dlopen(\"" + lib + "\", " + flag + ")");
         sendCommand("sharedlibrary " + dotEscape(lib));
         if (qq->useFastStart())
             sendCommand("set stop-on-solib-events 1");