/iface:cvf and OPENMP in Fortran

/iface:cvf and OPENMP in Fortran

Ritratto di carlos.zamora@esca.com
carlos.zamora@esca.com
Sab, 03/01/2004 - 00:04


Hello,

I have been playing with OPENMP and Fortan in both Windows and Linux platforms. In Windows, I have noticed that whenever I set the /iface:cvf compiler flag and, of course, alsouse /Qopenmp, I get the following linking error:

Linking...


LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library


libguide40.lib(kmp_ftn_stdcall_import.lobj) : error LNK2019: unresolved external symbol _kmp_set_library_gang referenced in function _KMP_SET_LIBRARY_GANG@0


Debug/HelloWorldOpenMP.exe : fatal error LNK1120: 1 unresolved external


This type of linking error happens with all Fortran-External Procedures-Calling Conventions, but the C, REFERENCE flag. Anyway, I wonder if the error I get is because the libraries we have are not up to date, or for some reason the /iface:CVF flag is not compatible with the /Qopenmp compiler flag.


We want to parallelize out power systems applications, most of the code is in FORTRAN, but we also use C and C++ to implemet some parts of our system. I think that this is the reason why in our build procedures we need to have the /iface:cvf flag set.


For completeness I have attached a small HelloWorld program where this happens (though I think it is not needed to reproduce this problem).


I appreciate any help with this issue.


Thanks,


Carlos


RSS In cima
4 post / 0 new
Ultimo contenuto
Per informazioni complete sulle ottimizzazioni del compilatore, consultare l'Avviso sull'ottimizzazione
Ritratto di Henry Gabb (Intel)
Henry Gabb (Intel)
Lun, 05/01/2004 - 18:15


Hello Carlos,
What version of the Intel Fortran compiler are you using on Windows? I'm using the Intel Fortran 7.1 compiler, which has/iface:default (enables CVF calling convention compatibility) and/iface:stdref options but not /iface:cvf. I'm able to use either /iface:default or /iface:stdref with the /Qopenmp option to compile an OpenMP program.

Best regards,
Henry

In cima
Ritratto di carlos.zamora@esca.com
carlos.zamora@esca.com
Lun, 05/01/2004 - 21:38

Thanks Henry for your reply,


From theHelp-About menu:


Intel Fortran Compiler Integration for Microsoft Visual Studio .NET 2003, Version 8.0.1877.2003


I have the following options set for the HelloOMP program:


/nologo /Zi /Od /Qopenmp /iface:cvf /module:"Debug/" /object:"Debug/" /traceback /check:bounds /libs:static /dbglibs /c


I am able to compile with /iface:default, but not with the /iface:stdref and /iface:cvf flags (of course with the /Qopenmp compiler flag). Moreover
I get different errors with these two flags:

1.- With the /iface:cvf flag


------ Build started: Project: HelloWorldOpenMP, Configuration: Debug Win32 ------


Compiling...


HelloWorldOpenMP.f90


ifort: Command line warning: openmp requires C style preprocessing; using fpp to preprocess


Linking...


LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library


libguide40.lib(kmp_ftn_stdcall_import.lobj) : error LNK2019: unresolved external symbol _kmp_set_library_gang referenced in function _KMP_SET_LIBRARY_GANG@0


Debug/HelloWorldOpenMP.exe : fatal error LNK1120: 1 unresolved externals


Build log written to file://D:userscazHelloWorldOpenMPHelloWorldOpenMPDebugBuildLog.txt


HelloWorldOpenMP build failed.





---------------------- Done ----------------------


Build: 0 succeeded, 1 failed, 0 skipped


1.- With the /iface:stdref flag


------ Build started: Project: HelloWorldOpenMP, Configuration: Debug Win32 ------


Compiling...


HelloWorldOpenMP.f90


ifort: Command line warning: openmp requires C style preprocessing; using fpp to preprocess


Linking...


HelloWorldOpenMP.obj : error LNK2019: unresolved external symbol _omp_get_max_threads@0 referenced in function _main__


HelloWorldOpenMP.obj : error LNK2019: unresolved external symbol _omp_get_thread_num@0 referenced in function ___main__


libifcoremt.lib(libifcoremain.obj) : error LNK2019: unresolved external symbol _MAIN__ referenced in function _main


Debug/HelloWorldOpenMP.exe : fatal error LNK1120: 3 unresolved externals


Build log written to file://D:userscazHelloWorldOpenMPHelloWorldOpenMPDebugBuildLog.txt


HelloWorldOpenMP build failed.





---------------------- Done ----------------------


Build: 0 succeeded, 1 failed, 0 skipped




As I said before, this problem may be related to the library versions that we have.



Thanks again,



Carlos

In cima
Ritratto di Henry Gabb (Intel)
Henry Gabb (Intel)
Mer, 07/01/2004 - 23:15


Hi Carlos,
Thanks for sending your test program. I wasn't able to reproduce the error with the Intel Fortran 8.0 compiler. Please submit this issue to Intel Premier Support.

Best regards,
Henry

In cima

Accedere per lasciare un commento.