I hope someone can assist me. I have done everthing I can to build a Qt Android project. But the following error shows during the building process. Please help me...

01:22:01: Running steps for project untitled...
01:22:01: Configuration unchanged, skipping qmake step.
01:22:01: Starting: "C:\QtAndroid\Tools\mingw491_32\bin\mingw32-make.exe"
C:\QtAndroid\5.4\android_armv7\bin\qmake.exe -spec android-g++ CONFIG+=debug -o Makefile ..\untitled\untitled.pro
The system cannot find the path specified.
C:\Android\AndroidNDK\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/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 -fno-builtin-memmove -std=gnu++0x -g -g -gdwarf-2 -marm -O0 -fno-omit-frame-pointer -Wall -Wno-psabi -W -D_REENTRANT -fPIE -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I..\untitled -I. -I..\..\5.4\android_armv7\include -I..\..\5.4\android_armv7\include\QtWidgets -I..\..\5.4\android_armv7\include\QtGui -I..\..\5.4\android_armv7\include\QtCore -I. -I. -I..\..\..\Android\AndroidNDK\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\include -I..\..\..\Android\AndroidNDK\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\libs\armeabi-v7a\include -I..\..\..\Android\AndroidNDK\android-ndk-r10d\platforms\android-9\arch-arm\usr\include -I..\..\5.4\android_armv7\mkspecs\android-g++ -o main.obj ..\untitled\main.cpp
makefile:1124: recipe for target 'main.obj' failed
process_begin: CreateProcess(NULL, C:\Android\AndroidNDK\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/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 -fno-builtin-memmove -std=gnu++0x -g -g -gdwarf-2 -marm -O0 -fno-omit-frame-pointer -Wall -Wno-psabi -W -D_REENTRANT -fPIE -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I..\untitled -I. -I..\..\5.4\android_armv7\include -I..\..\5.4\android_armv7\include\QtWidgets -I..\..\5.4\android_armv7\include\QtGui -I..\..\5.4\android_armv7\include\QtCore -I. -I. -I..\..\..\Android\AndroidNDK\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\include -I..\..\..\Android\AndroidNDK\android-ndk-r10d\sources\cxx-stl\gnu-libstdc++\4.9\libs\armeabi-v7a\include -I..\..\..\Android\AndroidNDK\android-ndk-r10d\platforms\android-9\arch-arm\usr\include -I..\..\5.4\android_armv7\mkspecs\android-g++ -o main.obj ..\untitled\main.cpp, ...) failed.
make (e=3): The system cannot find the path specified.

mingw32-make: *** [main.obj] Error 3
01:22:48: The process "C:\QtAndroid\Tools\mingw491_32\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project untitled (kit: Android for armeabi-v7a (GCC 4.9, Qt 5.4.1))
When executing step "Make"
01:22:48: Elapsed time: 00:47.