topic No, it is not compiler issue. in Intel® oneAPI Math Kernel Library

VDEXP undefined on windows for mkl 2017 update 2

xian-zhong_guous_cd- — Wed, 10 May 2017 23:33:38 GMT

I have following compiling error using mkl 2017 update 2 on windows (It only happens on windows; it's ok on linux)

.error: identifier "VDEXP" is undefined
VDEXP(&size, &x[0], &expx[0]);

How do you build the program?

Jing_Xu — Thu, 11 May 2017 01:44:28 GMT

How do you build the program?

Would you like to use https://software.intel.com/en-us/articles/intel-mkl-link-line-advisor to check whether it solves your problem or not?

Yes, I've used the linker

xian-zhong_guous_cd- — Thu, 11 May 2017 18:56:15 GMT

Yes, I've used the linker advisor. By the way, we've been using mkl all along. This compiling error only occurs with 2017 update 2 on windows.

Sam, that's strange : I see

Gennady_F_Intel — Thu, 11 May 2017 19:30:32 GMT

Sam, that's strange : I see this API is declared into mkl_vml_functions.h as well as in 32 & 64 bit libraries. MKL 2017 u2, windows.

/* Exponential function: r = e^a */
..............
_MKL_API(void,VDEXP,(const MKL_INT *n, const double a[], double r[]))

It could be our compiler

xian-zhong_guous_cd- — Thu, 11 May 2017 19:34:53 GMT

It could be our compiler issue. We recently upgraded our intel compiler.

No, it is not compiler issue.

xian-zhong_guous_cd- — Thu, 11 May 2017 21:09:48 GMT

No, it is not compiler issue. I got the same compiling error using previous compiler.

well, I use vdexp.c example

Gennady_F_Intel — Fri, 12 May 2017 02:08:32 GMT

well, I use vdexp.c example from <mklroot>\example\vmlc.

compiler - icl, v 2017 or cl - version 18.00

the code is compiled and executed as expected. MKL v.2017 u2.

cl /w /MT /I"C:\APPS\Intel2017\compilers_and_libraries\windows\mkl\include" /Fevdexp.exe exe vdexp.c "C:\APPS\Intel2017\compilers_and_libraries\w
indows\mkl\lib\intel64\mkl_intel_lp64.lib" "C:\APPS\Intel2017\compilers_and_libraries\windows\mkl\lib\intel64\mkl_intel_thread.lib" "C:\APPS\Intel2017
\compilers_and_libraries\windows\mkl\lib\intel64\mkl_core.lib" "C:\APPS\Intel2017\compilers_and_libraries\windows\compiler\lib\intel64\libiomp5md.lib"

vdexp.c
Microsoft (R) Incremental Linker Version 12.00.21005.1
Copyright (C) Microsoft Corporation. All rights reserved.

/out:vdexp.exe
vdexp.obj
C:\APPS\Intel2017\compilers_and_libraries\windows\mkl\lib\intel64\mkl_intel_lp64.lib
C:\APPS\Intel2017\compilers_and_libraries\windows\mkl\lib\intel64\mkl_intel_thread.lib
C:\APPS\Intel2017\compilers_and_libraries\windows\mkl\lib\intel64\mkl_core.lib
C:\APPS\Intel2017\compilers_and_libraries\windows\compiler\lib\intel64\libiomp5md.lib

vdexp.exe
vdExp test/example program

Argument vdExp
===============================================================================
-17.00000000000000 4.13993771878517e-008
-13.11110000000000 2.02265409612790e-006
-9.22220000000000 9.88210420175957e-005
-5.33330000000000 4.82811092818012e-003
-1.44440000000000 2.35887566644579e-001
2.44440000000000 1.15236333441634e+001
6.33330000000000 5.63011469474181e+002
10.22220000000000 2.75071156199207e+004
14.11110000000000 1.34391828719643e+006
18.00000000000000 6.56599691373305e+007

Relative accuracy is 0.0000000000000000

I still have this compiler

xian-zhong_guous_cd- — Thu, 15 Jun 2017 18:02:49 GMT

I still have this compiler error using intel 17.2 c/c++ compiler + mkl 2017.2. Any help is appreciated. Thanks.

Do you mean - ."error:

Gennady_F_Intel — Thu, 15 Jun 2017 19:04:18 GMT

Do you mean - ."error: identifier "VDEXP" is undefined"?
You may check if this symbol exist in libs (mkl_core.lib or mkl_rt.lib) you linked with this case and therefore the problem with the wrong linking line or etc

It is a compiler error. I

xian-zhong_guous_cd- — Thu, 15 Jun 2017 19:09:20 GMT

It is a compiler error. I have no problem using intel 16.3 c/c++ + mkl 2017.2. It seems we miss some flag of intel 17.2 or naming convention for calling fortran may have been changed for intel 17.2.

I think that a compiler error

mecej4 — Fri, 16 Jun 2017 01:46:02 GMT

I think that a compiler error message has been mistaken to be a linker error message in what has been said in this thread. The message "error: identifier "VDEXP" is undefined" is from the compiler, which is complaining that there is no prototype for the external function VDEXP. You should probably add #include <mkl_vml.h> in your C source file to take care of this.

The correct name to use in C

Jingwei_Z_Intel — Fri, 14 Jul 2017 17:25:31 GMT

The correct name to use in C is vdExp.

vdexp and VDEXP are intended to be used for FORTRAN. If you want to use them in C, please add underscore at the end (vdexp_ and VDEXP_) and pass all parameters as reference.

Thanks,

Jingwei