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.