QtCreator Cannot open include file (Windows) - windows

Question

I am trying to compile a open source project on windows: https://github.com/francisengelmann/FabScan100
I am using QtCreator 2.7.0, Qt Qt5.0.2 msvc2010_opengl, MSVC2010
My direcotries look like this:
C:\
C:\libs\opencv-2.4.2\
C:\libs\pcl-1.6.0
C:\libs\Qt\Qt5.0.2
C:\fabscan\FabScan100-master
I modified the qtTest.pro file to include the neccessary headers and libs:
INCLUDEPATH += C:\libs\pcl-1.6.0\3rdParty\Eigen\include
LIBS += C:\libs\pcl-1.6.0\3rdParty\Eigen\bin
INCLUDEPATH += C:\libs\pcl-1.6.0\3rdParty\FLANN\include\flann
LIBS += C:\libs\pcl-1.6.0\3rdParty\FLANN\lib
INCLUDEPATH += C:\libs\pcl-1.6.0\3rdParty\Boost\include\boost
LIBS += C:\libs\pcl-1.6.0\3rdParty\Boost\lib
INCLUDEPATH += C:\libs\opencv-2.4.2\opencv\build\include
LIBS += C:\libs\opencv-2.4.2\opencv\build\x86\vc10\lib
INCLUDEPATH += C:\libs\pcl-1.6.0\include\pcl-1.6
LIBS += C:\libs\pcl-1.6.0\lib \
-lpcl_common \
-lpcl_io \
-lpcl_filters \
-lpcl_kdtree \
-lpcl_registration \
-lpcl_features \
-lpcl_segmentation \
-lpcl_surface \
-lpcl_search
But when I press the compile button QtCreator throws me an error:
..\qtTest\staticHeaders.h(4) : fatal error C1083: Cannot open include file: 'Eigen/Core': No such file or directory
Which is kind of strange because the file is actually there. I am also able to open it in QtCreator by pressing STRG & Clicking on the include statement in staticHeaders.h
Any ideas?

Answer 1

Based on the staticHeaders.h code (line 4), you need to have a folder called "Eigen" which contains the "Core" file. For instance, I have /usr/include/eigen2/Eigen/Core on Linux, in which case /usr/include/eigen2 has to be added to the INCLUDEPATH variable with qmake. Make sure you have C:\libs\pcl-1.6.0\3rdParty\Eigen\include.
Also, if it does not work in QtCreator as per your comment, you can always try to force explicitly to rerun qmake by the execute qmake option.