QtCreator temporarily freeze on compilation/qmake

[NetZwerg]

Running Debug Compile and Execute for Android, running Win7 + Qt5.1OS + MingW48_32, freezes QtCreator UI temporarily. This does not happen on Qt4.6.3commercial,4.8.4static + QtCreator 2.3.1/2.7/2.8 + MSVC on Desktop Projects. System is running on quite a decent Hardware.

--- Press F5 (Compile and Run Debug), UI starts freezing here ---

08:36:12: Führe Schritte für Projekt ApplicationNameHere aus...
08:36:12: Unveränderte Konfiguration, qmake-Schritt wird übersprungen.
08:36:12: Starte "D:\Qt5.1.0\Tools\mingw48_32\bin\mingw32-make.exe"

--- UI responds after 40 secs freeze here (at least if qmake has nothing to do, feels like waiting forever otherwise), for about 1 second and freezes again ---

D:/Qt5.1.0/5.1.0/android_armv7/bin/uic.exe ../ApplicationNameHere/filenamehere.ui -o ui_filenamehere.h
D:\QT\Android\android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64/bin/arm-linux-androideabi-g++ -c -Wno-psabi -march=armv7-a -mfloat-abi=softfp -mfpu=vfp -ffunction-sections -funwind-tables -fstack-protector -fno-short-enums -DANDROID -Wa,--noexecstack -std=gnu++0x -g -g -marm -O0 -fno-omit-frame-pointer -Wall -Wno-psabi -W -D_REENTRANT -fPIE -DQT_NO_PRINTDIALOG -DQT_QML_DEBUG -DQT_DECLARATIVE_DEBUG -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../../Qt5.1.0/5.1.0/android_armv7/mkspecs/android-g++ -I../ApplicationNameHere -I../../Qt5.1.0/5.1.0/android_armv7/include -I../../Qt5.1.0/5.1.0/android_armv7/include/QtWidgets -I../../Qt5.1.0/5.1.0/android_armv7/include/QtNetwork -I../../Qt5.1.0/5.1.0/android_armv7/include/QtGui -I../../Qt5.1.0/5.1.0/android_armv7/include/QtCore -I. -I. -I../../QT/Android/android-ndk-r9/sources/cxx-stl/gnu-libstdc++/4.8/include -I../../QT/Android/android-ndk-r9/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi-v7a/include -I../../QT/Android/android-ndk-r9/platforms/android-9/arch-arm/usr/include -I. -o filenamehere.obj ../ApplicationNameHere/filenamehere.cpp
D:\QT\Android\android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64/bin/arm-linux-androideabi-g++ --sysroot=D:\QT\Android\android-ndk-r9/platforms/android-9/arch-arm/ -Wl,-soname,libApplicationNameHere.so -Wl,--no-undefined -Wl,-z,noexecstack -shared -o libApplicationNameHere.so main.obj filenamehere.obj qrc_ApplicationNameHere.obj moc_filenamehere.obj -LD:\QT\Android\android-ndk-r9/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi-v7a -LD:\QT\Android\android-ndk-r9/platforms/android-9/arch-arm//usr/lib -lgnustl_shared -lsupc++ -llog -lz -lm -ldl -lc -lgcc -LD:\Qt5.1.0\5.1.0\android_armv7\lib -lQt5Widgets -lQt5Network -lQt5Gui -lQt5Core -lGLESv2
08:36:25: Der Prozess "D:\Qt5.1.0\Tools\mingw48_32\bin\mingw32-make.exe" wurde normal beendet.

--- UI responds from here ---

08:36:25: Starte "D:\Qt5.1.0\Tools\mingw48_32\bin\mingw32-make.exe" INSTALL_ROOT="D:/SVN/ApplicationNameHere/android" install
cygwin warning:
MS-DOS style path detected: D:/SVN/ApplicationNameHere/android/libs/armeabi-v7a/
Preferred POSIX equivalent is: /cygdrive/d/SVN/ApplicationNameHere/android/libs/armeabi-v7a/
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
cp -f "libApplicationNameHere.so" "D:/SVN/ApplicationNameHere/android/libs/armeabi-v7a/libApplicationNameHere.so"
cygwin warning:
MS-DOS style path detected: D:/SVN/ApplicationNameHere/android/libs/armeabi-v7a/libApplicationNameHere.so
Preferred POSIX equivalent is: /cygdrive/d/SVN/ApplicationNameHere/android/libs/armeabi-v7a/libApplicationNameHere.so
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
08:36:26: Der Prozess "D:\Qt5.1.0\Tools\mingw48_32\bin\mingw32-make.exe" wurde normal beendet.
08:36:27: Kopiere Qt-Anwendung und -Bibliotheken zu Android-Paket...
08:36:27: Erzeuge Paketdatei...
08:36:27: Paket-Deployment: Führe Befehl 'D:/QT/Android/WinAnt/bin/ant.bat clean debug' aus.

--- Short UI Hickup here for about 1 sec., responds normal for rest of build/packaging ---