Compile QtOpenCl.dll with Qt (64bit)

[morflink]

Hey Community,

i am a real newb in understanding whats going on with linkers, compilers, headers, dynamic libraries and all that stuff, so please forgive me for the following.
i just installed Qt 64bit on win7 x64 guided by this: "http://www.holoborodko.com/pavel/2011/02/01/how-to-compile-qt-4-7-with-visual-studio-2010/":http://www.holoborodko.com/pavel/2011/02/01/how-to-compile-qt-4-7-with-visual-studio-2010/

i just got a few memories what i had to do when creating the qtopencl libraries with 32bit compiler.
all i did for now is, downloading the "sourcecode":http://qt.gitorious.org/qt-labs/opencl as a .tar.gz, unzip it and try to qmake the opencl.pro file within my qtcreator ( using MSVC C++ compiler 10.0 (x64) )
if i try to, i just get the LNK2001 errors which tell me that they cant find all the important .obj files like "qclvector.obj"
i remember that i need to copy paste my opencl.dll (out of the system32 folder or from my nvidia driver) to somewhere like the release folder of the qt-opencl project...

as i guess the information i just write down here is insufficient for you... so please ask me questions or give me somehow a solution for me.
i hope to compile the QtOpenCl.dll is a standard task so you can help me out... thanks for reading!

[SGaist]

Hi and welcome to devnet,

Can you show what errors you get ?

You don't need to move the OpenCL dll however you need the OpenCL lib file(s) to link to.

Do you have them ?

[morflink]

it just says that it cannot find all the following .obj files.
how do i get the OpenCL lib file(s) ?
(sry its the german client >_<)

@Bibliothek "....\bin\QtOpenCL.lib" und Objekt "....\bin\QtOpenCL.exp" werden erstellt.
qclsampler.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qcluserevent.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "clRetainEvent" in Funktion ""public: __cdecl QCLEvent::QCLEvent(class QCLEvent const &)" (??0QCLEvent@@QEAA@AEBV0@@Z)".
qclvector.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclimage.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclkernel.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclmemoryobject.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclprogram.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclbuffer.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclcommandqueue.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclcontext.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclevent.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clRetainEvent".
qclsampler.obj : error LNK2001: Nicht aufgelöstes externes Symbol "clReleaseEvent".
qcluserevent.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "clReleaseEvent" in Funktion ""public: __cdecl QCLEvent::~QCLEvent(void)" (??1QCLEvent@@QEAA@XZ)".
@ ...about 180 failures later...
@
qclprogram.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "clCreateKernelsInProgram" in Funktion ""public: class QList<class QCLKernel> __cdecl QCLProgram::createKernels(void)const " (?createKernels@QCLProgram@@QEBA?AV?$QList@VQCLKernel@@@@XZ)".
qclprogram.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "clBuildProgram" in Funktion ""public: bool __cdecl QCLProgram::build(class QList<class QCLDevice> const &,class QString const &)" (?build@QCLProgram@@QEAA_NAEBV?$QList@VQCLDevice@@@@AEBVQString@@@Z)".
qclsampler.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "clGetSamplerInfo" in Funktion ""public: bool __cdecl QCLSampler::normalizedCoordinates(void)const " (?normalizedCoordinates@QCLSampler@@QEBA_NXZ)".
....\bin\QtOpenCL.dll : fatal error LNK1120: 61 nicht aufgelöste externe Verweise.
NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\link.EXE"": Rückgabe-Code "0x460"
Stop.
NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\nmake.exe"": Rückgabe-Code "0x2"
Stop.
NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
Stop.
NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
Stop.
10:32:47: Der Prozess "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\nmake.exe" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen des Projekts opencl(Ziel: Desktop)
Bei der Ausführung von Build-Schritt 'Make'@

[SGaist]

Looks like you're missing the OpenCL development libraries

[morflink]

can you tell me what to do ?

[SGaist]

Install the OpenCL drivers and SDK from your graphics card manufacturer. AFAIK, for e.g. Nvidia you can install the CUDA SDK and it should come with it

[morflink]

i have cuda installed... where to finde all needed files?

[SGaist]

I don't have a windows computer at hand but doing a search in the CUDA sdk folder should tell you where the OpenCL libs can be found

[morflink]

where to paste the opencl.lib and the opencl.h ?

[SGaist]

No need to past them anywhere, just put the right paths in your pro file

[morflink]

omfg, i just realized that i got a new graphics card...
its amd and i just can find so called amd_opencl32.dll or 64.dll in sum drivers folders...but nothing in the catalyst folders nor ATI Technologies folders.

[SGaist]

Did you install the AMD OpenCL SDK ?

[morflink]

well i did now.... can you tell me what to execute or how to link and which files need to be linked ?
omfg im such a noob :D

[SGaist]

Before that did you retry to build QtOpenCL from scratch ?

[morflink]

the failures above still come up, if thats what you ask for

[morflink]

mb i've got the wrong sdk.... named APP AMD SDK.
there is a so called OpenCLService.exe which i installed via prompt
OpenCLService.exe -i and run it via -s

[SGaist]

So, it is working now ?

[morflink]

no its not, still the same errors

[SGaist]

Do you have any OpenCL something lib file in the AMD sdk ?

[morflink]

nope
just kernels for examples and stuff

[SGaist]

Strange, did you do a global disk search ? Sometimes there are things are dispatched in both Program Files and Program Files (x86)

Just to be sure did you download "that":http://developer.amd.com/tools-and-sdks/opencl-zone/opencl-tools-sdks/amd-accelerated-parallel-processing-app-sdk/ sdk ?

[morflink]

yes, thats what i installed...
i did searched for opencl files... and as i posted before i just found strange files like AMD_opencl64.dl_
i always throught the only thing i need is the opencl.dll (no matter from which source) and compile it with the needed compiler, in my case the amdx64 compiler of msvs10.0

[SGaist]

no .lib or .a file ?

[morflink]

the only .lib or .a files are named glew32 and 64 or glut32 64.

[SGaist]

I wonder if the SDK has installed correctly

[morflink]

did you see the lib files if you take a look at it ?

[morflink]

ololol, i searched them manually and found them
dunno why the autosearch cant track them.... OpenCL.lib and libOpenCL.a
what to do now ?

[SGaist]

Depending on your compiler link to either OpenCL.libg (Visual Studio) or libOpenCL.a if you are using MinGW

[morflink]

i use MSVS compiler for 64bit... how to link libs in the pro file?

[SGaist]

You can use Qt Creator built in dialog for that.

Or add

@
LIBS += -Lpath/to/sdk/ -lOpenCL
@

If you want to be independent from the SDK installation path, you can use the environment variables to generate the proper path

[morflink]

well, thank you so far... now the compiler says:
@NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\link.EXE"": Rückgabe-Code "0x49d"
Stop.
NMAKE : fatal error U1077: ""C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\nmake.exe"": Rückgabe-Code "0x2"
Stop.
NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
Stop.
NMAKE : fatal error U1077: "cd": Rückgabe-Code "0x2"
Stop.@

i just added the following:
@LIBS += -LC:/Program Files (x86)/AMD APP SDK/2.9/lib/x86_64 -lOpenCL@

[SGaist]

Spaces are really bad on windows

try

@LIBS += -L$$quote("C:/Program Files (x86)/AMD APP SDK/2.9/lib/x86_64"@

If that doesn't work, use the 8.3 naming scheme

[morflink]

if i just use this advice, i get the same errors like i got at the very beginning.
then i tried to copy paste the whole folder to another path without spaces and get still the same errors.
8.3 naming scheme means to give the files in particular like ?:

@LIBS += -L$$quote("C:/Program Files (x86)/AMD APP SDK/2.9/lib/x86_64/libOpenCL.a") -lOpenCl@

[SGaist]

No, the path itself and don't add the library name since you also pass the -lOpenCL option.

@LIBS += -LC:/PROGRA~1/AMDAPP~1/2.9/lib/x86_64@

Please check the both on the command line with dir /x

[morflink]

i just checkd and saw that its PROGRA~2 cuz of the standard Programms folder and the x86 one but the errors dont change.

[SGaist]

Can you post the current content of your pro file ?

[morflink]

@TEMPLATE = lib
TARGET = QtOpenCL
gcov {
CONFIG += staticlib
} else {
CONFIG += dll
}
CONFIG += warn_on
win32 {
DESTDIR = ../../bin
!static:DEFINES += QT_MAKEDLL
}
else:DESTDIR = ../../lib

win32 {
!isEmpty(QMAKE_INCDIR_OPENCL) {
QMAKE_CXXFLAGS += -I$$QMAKE_INCDIR_OPENCL
}
!isEmpty(QMAKE_LIBDIR_OPENCL) {
LIBS += -L$$QMAKE_LIBDIR_OPENCL
}
!isEmpty(QMAKE_LIBS_OPENCL) {
LIBS += $$QMAKE_LIBS_OPENCL
} else {
LIBS += -lOpenCL
}
}

macx:!opencl_configure {
LIBS += -framework OpenCL
}

LIBS += -LC:/PROGRA~2/AMDAPP~1/2.9/lib/x86_64

HEADERS +=
qclbuffer.h
qclcommandqueue.h
qclcontext.h
qcldevice.h
qclevent.h
qclglobal.h
qclimage.h
qclimageformat.h
qclkernel.h
qclmemoryobject.h
qclplatform.h
qclprogram.h
qclsampler.h
qcluserevent.h
qclvector.h
qclworksize.h

SOURCES +=
qclbuffer.cpp
qclcommandqueue.cpp
qclcontext.cpp
qcldevice.cpp
qclevent.cpp
qclimage.cpp
qclimageformat.cpp
qclkernel.cpp
qclmemoryobject.cpp
qclplatform.cpp
qclprogram.cpp
qclsampler.cpp
qcluserevent.cpp
qclvector.cpp
qclworksize.cpp

PRIVATE_HEADERS +=
qclext_p.h

HEADERS += $$PRIVATE_HEADERS
DEFINES += QT_BUILD_CL_LIB

opencl_1_1 {
DEFINES += QT_OPENCL_1_1
}

@

[SGaist]

Just to be sure I understand you correctly, you are again getting the missing symbols error ?

[morflink]

[quote author="SGaist" date="1402867816"]Just to be sure I understand you correctly, you are again getting the missing symbols error ?[/quote]

yes

[morflink]

maybe this is an interessting information...
i just used the 32bit Qt 4.7.1 and the compiled qtopencl libraries... is it possible that there are just older files or installations of whatsoever which causes failures like that?
i simply followed the instructions and maybe this is a reason why is just dont work out as it should.