Set debugger when importing tool chains from old settings

Set the default debugger when importing tool chains from old
settings. We just left the field blank before.

Task-number: QTCREATORBUG-4482
Reviewed-by: dt

src/plugins/projectexplorer/gcctoolchain.cpp

@@ -691,6 +691,16 @@ QString Internal::MingwToolChainFactory::id() const
 
 QList<ToolChain *> Internal::MingwToolChainFactory::autoDetect()
 {
+    // Compatibility to pre-2.2:
+    // All Mingw toolchains that exist so far are either installed by the SDK itself (in
+    // which case they most likely have debuggers set up) or were created when updating
+    // from a previous Qt version. Add debugger in that case.
+    foreach (ToolChain *tc, ToolChainManager::instance()->toolChains()) {
+        if (tc->debuggerCommand().isEmpty() && tc->id().startsWith(QLatin1String(Constants::MINGW_TOOLCHAIN_ID)))
+            static_cast<MingwToolChain *>(tc)
+                ->setDebuggerCommand(ToolChainManager::instance()->defaultDebugger(tc->targetAbi()));
+    }
+
     Abi ha = Abi::hostAbi();
     return autoDetectToolchains(QLatin1String("g++"), QStringList(),
                                 Abi(ha.architecture(), Abi::WindowsOS, Abi::WindowsMSysFlavor, Abi::PEFormat, ha.wordWidth()));

src/plugins/qt4projectmanager/qt-s60/gccetoolchain.cpp

@@ -37,6 +37,7 @@
 #include <utils/environment.h>
 #include <utils/synchronousprocess.h>
 #include <projectexplorer/headerpath.h>
+#include <projectexplorer/toolchainmanager.h>
 
 #include <QtCore/QDir>
 
@@ -160,6 +161,7 @@ QList<ProjectExplorer::ToolChain *> GcceToolChainFactory::autoDetect()
             GcceToolChain *tc = new GcceToolChain(false);
             tc->setCompilerPath(fi.absoluteFilePath());
             tc->setDisplayName(tr("GCCE from Qt version"));
+            tc->setDebuggerCommand(ProjectExplorer::ToolChainManager::instance()->defaultDebugger(tc->targetAbi()));
             result.append(tc);
         }
     }

src/plugins/qt4projectmanager/qt-s60/rvcttoolchain.cpp

@@ -37,6 +37,7 @@
 
 #include <projectexplorer/abi.h>
 #include <projectexplorer/headerpath.h>
+#include <projectexplorer/toolchainmanager.h>
 #include <utils/environment.h>
 #include <utils/environmentmodel.h>
 #include <utils/synchronousprocess.h>
@@ -535,6 +536,7 @@ QList<ProjectExplorer::ToolChain *> RvctToolChainFactory::autoDetect()
         tc->setDisplayName(name.arg(armVersionString(tc->armVersion()))
                            .arg(v.majorVersion).arg(v.minorVersion).arg(v.build));
         tc->setVersion(v);
+        tc->setDebuggerCommand(ProjectExplorer::ToolChainManager::instance()->defaultDebugger(tc->targetAbi()));
         result.append(tc);
     }
 

src/plugins/qt4projectmanager/qtversionmanager.cpp

@@ -185,6 +185,8 @@ QtVersionManager::QtVersionManager()
                 if (tc) {
                     tc->setCompilerPath(fi.absoluteFilePath());
                     tc->setDisplayName(tr("MinGW from %1").arg(version->displayName()));
+                    // The debugger is set later in the autoDetect method of the MinGw tool chain factory
+                    // as the default debuggers are not yet registered.
                     ProjectExplorer::ToolChainManager::instance()->registerToolChain(tc);
                 }
             }