[Openmp-dev] libomp.lib is not automatically added on Windows

Sun Aug 16 20:54:02 PDT 2015

I'm working on it

Best regards,
Alexey Bataev
=============
Software Engineer
Intel Compiler Team

11.08.2015 19:22, Jack Howarth пишет:
>      Doesn't visualstudio::Linker::ConstructJob() in
> cfe/lib/Driver/Tools.cpp need to be expanded to handle OMPRT_OMP?
> Currently that is only done in darwin::Linker::ConstructJob() and
> gnutools::Linker::ConstructJob(). It seems that the same support was
> never added to  visualstudio::Linker::ConstructJob().
>                    Jack
>
> On Tue, Aug 11, 2015 at 2:14 AM, İsmail Dönmez
> <openmp-dev at lists.llvm.org> wrote:
>> That doesn't change the result on Windows.
>>
>> On Tuesday, August 11, 2015, Bataev, Alexey via Openmp-dev
>> <openmp-dev at lists.llvm.org> wrote:
>>> Johnny,
>>> try to use -fopenmp=libomp. Currently -fopenmp does not turn on OpenMP
>>> support.
>>>
>>> Best regards,
>>> Alexey Bataev
>>> =============
>>> Software Engineer
>>> Intel Compiler Team
>>>
>>> 10.08.2015 18:51, Peyton, Jonathan L via Openmp-dev пишет:
>>>> Clang front end developers,
>>>>
>>>> We are having trouble getting the -fopenmp flag to work on Windows.  It
>>>> appears that the linking phase does not include libomp.lib?  Below is an
>>>> OpenMP hello world compilation output.
>>>>
>>>> -- Johnny
>>>>
>>>> -----Original Message-----
>>>> From: İsmail Dönmez [mailto:ismail at i10z.com]
>>>> Sent: Monday, August 10, 2015 10:04 AM
>>>> To: Peyton, Jonathan L
>>>> Subject: Re: [Openmp-dev] libomp.lib is not automatically added on
>>>> Windows
>>>>
>>>> Hi,
>>>>
>>>> On Mon, Aug 10, 2015 at 6:02 PM, Peyton, Jonathan L
>>>> <jonathan.l.peyton at intel.com> wrote:
>>>>> Can you include -v in the compile command and post the output?
>>>> Sure:
>>>>
>>>> C:\Users\ismail\Desktop>clang -O2 -fms-compatibility-version=19 -fopenmp
>>>> -v omp_hello.c clang version 3.8.0 (http://llvm.org/git/clang
>>>> 45770fa6e4eb618277ed85044d5a2d4c962c57cf) (http://llvm.org/git/llvm
>>>> 97bdbf60d9923a9e06effbb96801129070499fd5)
>>>> Target: x86_64-pc-windows-msvc
>>>> Thread model: posix
>>>> InstalledDir: C:\Program Files\LLVM\bin
>>>>    "C:\\Program Files\\LLVM\\bin\\clang.exe" -cc1 -triple
>>>> x86_64-pc-windows-msvc19.0.0 -emit-obj -disable-free -main-file-name
>>>> omp_hello.c -mrelocation-model pic -pic-level 2 -mthread-model posix
>>>> -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu
>>>> x86-64 -momit-leaf-frame-pointer -v -dwarf-column-info -resource-dir
>>>> "C:\\Program Files\\LLVM\\bin\\..\\lib\\clang\\3.8.0"
>>>> -internal-isystem "C:\\Program
>>>> Files\\LLVM\\bin\\..\\lib\\clang\\3.8.0\\include" -internal-isystem
>>>> "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\INCLUDE"
>>>> -internal-isystem "C:\\Program Files (x86)\\Microsoft Visual Studio
>>>> 14.0\\VC\\ATLMFC\\INCLUDE" -internal-isystem "C:\\Program Files
>>>> (x86)\\Windows Kits\\10\\include\\10.0.10150.0\\ucrt"
>>>> -internal-isystem "C:\\Program Files (x86)\\Windows
>>>> Kits\\NETFXSDK\\4.6\\include\\um" -internal-isystem "C:\\Program Files
>>>> (x86)\\Windows Kits\\8.1\\include\\shared" -internal-isystem "C:\\Program
>>>> Files (x86)\\Windows Kits\\8.1\\include\\um"
>>>> -internal-isystem "C:\\Program Files (x86)\\Windows
>>>> Kits\\8.1\\include\\winrt" -O2 -fdebug-compilation-dir
>>>> "C:\\Users\\ismail\\Desktop" -ferror-limit 19 -fmessage-length 100 -fopenmp
>>>> -fnoopenmp-use-tls -mstackrealign -fms-extensions -fms-compatibility
>>>> -fms-compatibility-version=19 -fdelayed-template-parsing -fobjc-runtime=gcc
>>>> -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops
>>>> -vectorize-slp -o
>>>> "C:\\Users\\ismail\\AppData\\Local\\Temp\\omp_hello-45bdc2.o" -x c
>>>> omp_hello.c clang -cc1 version 3.8.0 based upon LLVM 3.8.0svn default target
>>>> x86_64-pc-windows-msvc #include "..." search starts here:
>>>> #include <...> search starts here:
>>>>    C:\Program Files\LLVM\bin\..\lib\clang\3.8.0\include
>>>>    C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE
>>>> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\INCLUDE
>>>> C:\Program Files (x86)\Windows Kits\10\include\10.0.10150.0\ucrt  C:\Program
>>>> Files (x86)\Windows Kits\NETFXSDK\4.6\include\um  C:\Program Files
>>>> (x86)\Windows Kits\8.1\include\shared  C:\Program Files (x86)\Windows
>>>> Kits\8.1\include\um  C:\Program Files (x86)\Windows Kits\8.1\include\winrt
>>>> End of search list.
>>>>    "C:\\Program Files (x86)\\Microsoft Visual Studio
>>>> 14.0\\VC\\bin\\amd64\\link.exe" -out:a.exe -defaultlib:libcmt -nologo
>>>> "C:\\Users\\ismail\\AppData\\Local\\Temp\\omp_hello-45bdc2.o"
>>>> omp_hello-45bdc2.o : error LNK2019: unresolved external symbol
>>>> __kmpc_fork_call referenced in function main omp_hello-45bdc2.o : error
>>>> LNK2019: unresolved external symbol omp_get_thread_num referenced in
>>>> function .omp_outlined.
>>>> omp_hello-45bdc2.o : error LNK2019: unresolved external symbol
>>>> omp_get_num_threads referenced in function .omp_outlined.
>>>> omp_hello-45bdc2.o : error LNK2019: unresolved external symbol
>>>> __kmpc_cancel_barrier referenced in function .omp_outlined.
>>>> a.exe : fatal error LNK1120: 4 unresolved externals
>>>> clang.exe: error: linker command failed with exit code 1120 (use -v to
>>>> see invocation)
>>>>
>>>> C:\Users\ismail\Desktop>
>>>> _______________________________________________
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>>>> Openmp-dev at lists.llvm.org
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>>>
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