topic Hello, in Intel® oneAPI Math Kernel Library

Linking MKL with Eclipse IDE CDT C/C++

elmeliegy__abdelrahm — Wed, 20 Dec 2017 22:47:53 GMT

I am trying to link Intel Math Kernel Library (MKL) with C/C++ through Eclipse IDE. Actually i followed the steps provided by Intel website but still the problem. I am trying to compile one example of those coming with the MKL package. The console shows me this "error in BOLD" ;

17:34:17 **** Incremental Build of configuration Debug for project complex2 ****
Info: Internal Builder is used for build
gcc "-IC:\\Program Files (x86)\\IntelSWTools\\compilers_and_libraries_2018.1.156\\windows\\mkl\\include" "-IC:\\Program Files (x86)\\IntelSWTools\\compilers_and_libraries_2018.1.156\\windows\\mkl\\include\\fftw" -O0 -g3 -Wall -c -fmessage-length=0 -o complex2.o "..\\complex2.c"
gcc "-LC:\\Program Files (x86)\\IntelSWTools\\compilers_and_libraries_2018.1.156\\windows\\mkl\\lib\\intel64_win" -o complex2.exe complex2.o -lmkl_blas95_ilp64 -lmkl_blas95_lp64 -lmkl_core -lmkl_core_dll -lmkl_intel_ilp64 -lmkl_intel_ilp64_dll -lmkl_intel_lp64 -lmkl_intel_lp64_dll -lmkl_intel_thread -lmkl_intel_thread_dll -lmkl_lapack95_ilp64 -lmkl_lapack95_lp64 -lmkl_rt -lmkl_sequential -lmkl_sequential_dll -lmkl_tbb_thread -lmkl_tbb_thread_dll
complex2.o: In function `main':
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:93: undefined reference to `init_input_and_expected_vectors_c'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:99: undefined reference to `fftw_create_plan'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:100: undefined reference to `die_unless'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:105: undefined reference to `fftw_one'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:120: undefined reference to `fftw_create_plan'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:121: undefined reference to `die_unless'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:126: undefined reference to `fftw_one'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:136: undefined reference to `scaling'
C:\Users\aaelmeli\workspace\complex2\Debug/../complex2.c:144: undefined reference to `check_result_c'
collect2.exe: error: ld returned 1 exit status

17:34:27 Build Finished (took 10s.41ms)

To use the FFTW interface,

mecej4 — Thu, 21 Dec 2017 17:13:00 GMT

To use the FFTW interface, you need to compile and link with the FFTW wrapper, which is provided as source code, as described at https://software.intel.com/en-us/mkl-developer-reference-c-appendix-d-fftw-interface-to-intel-math-kernel-library .

Your linking line shows indiscriminate use of all the MKL libraries. For instance, the *95 libraries have no relevance to using MKL from C code. The *ilp64* and *lp64 libraries are incompatible and you should use only the appropriate ones for your code. See https://software.intel.com/en-us/articles/intel-mkl-link-line-advisor .

I am sorry mecej4, How can I

elmeliegy__abdelrahm — Fri, 22 Dec 2017 01:21:00 GMT

I am sorry mecej4, How can I compile and link with FFTW wrappers. As I see, there are many files.c which are not containing the Main function.

Also, how can I identify which library I should use.

I am sorry for that but really I am confused. I am using Eclipse IDE CDT for C/C++ with GCC compiler.

Thanks in advance.

MKL packages contain the

Gennady_F_Intel — Fri, 22 Dec 2017 03:46:41 GMT

MKL packages contain the makefiles which may help you to build standalone libraries of FFTW[3/2] [C/F] wrappers to MKL. see MKLROOT/interfaces folders.

Regards to your original questions -- the set of libs you used for linking contains everything but this is not what mkl linker adviser recommends to do. Please check with MKL LA or see MKL User's Guide the examples how build/link your application.

Hi

elmeliegy__abdelrahm — Fri, 29 Dec 2017 01:01:28 GMT

I am trying now with VS 2017, the OS is windows 10. I am trying to build the lib for fftw2x but i could not.

i opened the command window , i changed the direcctory to the wrapper directory where makefile exists. then : nmake libintel64 compiler=msvc install_dir=desktop.

but it gives me that error

The directory or file cannot be created.

NMAKE : fatal error U1077: 'if' : return code '0x1'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX64\x64\nmake.EXE"' : return code '0x2'

Stop"

Please, can you help me with that. i have been trying more than a week.

Thanks in advance

If you are not the system

mecej4 — Fri, 29 Dec 2017 01:15:28 GMT

If you are not the system administrator or have administrator privileges on your computer, you will have to copy the FFTW source package (including makefiles, etc.) to a working directory on a device/directory on your machine to which you have full access and build the library there. After building the library, if you want it added to the MKL directory tree, you may need to ask your system administrator to do so.

Ying_H_Intel — Fri, 29 Dec 2017 01:37:59 GMT

Hello,
Mecej4 is right, please copy the whole fftw2c folder to one writable folder, then the nmake will work. the processing is like

1. copy fftw2c to your desktop , which support can be wrote. In command line, you may first run
2. Open MSVS 2017 command line windows from start-up -> All programs -> Visual Stuido 2017-> Visual Studio tools-> developer command prompt for VS 2017 : cd the folder

3. in command line wondows, run the command to set MKL environment :

"C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\bin\mklvars.bat" intel64
4. nmake libintel64 compiler=msvs (not msvc) install_dir=desktop

Hope it helps

Best Regards,
Ying

By the way, the MKL library for window should be work with intel compiler and MSVS compiler , don't support GNU GCC + mkl library for windows. So you may not to use MKL in Eclipse with GNU GCC.

Here is the command output in my MSVS prompt windows

**********************************************************************
** Visual Studio 2017 Developer Command Prompt v15.0.26228.10
** Copyright (c) 2017 Microsoft Corporation
**********************************************************************

C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional>cd C:\Program F
iles (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\interface
s\fftw2xc

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\m
kl\interfaces\fftw2xc>nmake libintel64 compiler=msvc install_dir=desktop

nmake PLAT=win32e lib ARCH=intel64 compiler=msvc PRECISION=MKL_DOUBLE

if not exist "desktop\obj_double_msvc" md "desktop\obj_double_msvc"
The directory or file cannot be created.
NMAKE : fatal error U1077: 'if' : return code '0x1'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\m
kl\interfaces\fftw2xc>cd ..

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\m
kl\interfaces>cd C:\Users\yhu5\Desktop\mkl example\fftw2xc\fftw2xc

C:\Users\yhu5\Desktop\mkl example\fftw2xc\fftw2xc>nmake libintel64 compiler=msvc
install_dir=desktop

nmake PLAT=win32e lib ARCH=intel64 compiler=msvc PRECISION=MKL_DOUBLE

if not exist "desktop\obj_double_msvc" md "desktop\obj_double_msvc"
nmake fftw.obj fftw_check_memory_leaks.obj fftw_create_plan.obj fftw_
create_plan_specific.obj fftw_destroy_plan.obj fftw_die.obj fftw_export_wisdo
m.obj fftw_export_wisdom_to_file.obj fftw_export_wisdom_to_string.obj fftw_fo
rget_wisdom.obj fftw_fprint_plan.obj fftw_free.obj fftw_import_wisdom.obj ff
tw_import_wisdom_from_file.obj fftw_import_wisdom_from_string.obj fftw_malloc.
obj fftw_one.obj fftw_print_max_memory_usage.obj fftw_print_plan.obj fftw_si
zeof_fftw_real.obj fftw_threads.obj fftw_threads_init.obj fftw_threads_one.ob
j fftw2d_create_plan.obj fftw2d_create_plan_specific.obj fftw3d_create_plan.o
bj fftw3d_create_plan_specific.obj fftwnd.obj fftwnd_create_plan.obj fftwnd_
create_plan_specific.obj fftwnd_destroy_plan.obj fftwnd_fprint_plan.obj fftwn
d_one.obj fftwnd_print_plan.obj fftwnd_threads.obj fftwnd_threads_one.obj rf
ftw.obj rfftw_create_plan.obj rfftw_create_plan_specific.obj rfftw_destroy_pl
an.obj rfftw_executor_simple.obj rfftw_fprint_plan.obj rfftw_one.obj rfftw_p
rint_plan.obj rfftw_threads.obj rfftw_threads_one.obj rfftw2d_create_plan.obj
rfftw2d_create_plan_specific.obj rfftw3d_create_plan.obj rfftw3d_create_plan
_specific.obj rfftwnd_complex_to_real.obj rfftwnd_create_plan.obj rfftwnd_cre
ate_plan_specific.obj rfftwnd_destroy_plan.obj rfftwnd_fprint_plan.obj rfftwn
d_one_complex_to_real.obj rfftwnd_one_real_to_complex.obj rfftwnd_print_plan.o
bj rfftwnd_real_to_complex.obj rfftwnd_threads_complex_to_real.obj rfftwnd_th
reads_one_complex_to_real.obj rfftwnd_threads_one_real_to_complex.obj rfftwnd_
threads_real_to_complex.obj library compiler=msvc PRECISION=MKL_DOUBLE

set include=..\..\include;..\..\include\fftw;%include%
icl /c /MT /DMKL_DOUBLE /Fo"desktop\obj_double_msvc"\ wrappers\fftw.c
'icl' is not recognized as an internal or external command,
operable program or batch file.
NMAKE : fatal error U1077: 'icl' : return code '0x1'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.

C:\Users\yhu5\Desktop\mkl example\fftw2xc\fftw2xc>nmake libintel64 compiler=msvs
install_dir=desktop

nmake PLAT=win32e lib ARCH=intel64 compiler=msvs PRECISION=MKL_DOUBLE

if not exist "desktop\obj_double_msvs" md "desktop\obj_double_msvs"
nmake fftw.obj fftw_check_memory_leaks.obj fftw_create_plan.obj fftw_
create_plan_specific.obj fftw_destroy_plan.obj fftw_die.obj fftw_export_wisdo
m.obj fftw_export_wisdom_to_file.obj fftw_export_wisdom_to_string.obj fftw_fo
rget_wisdom.obj fftw_fprint_plan.obj fftw_free.obj fftw_import_wisdom.obj ff
tw_import_wisdom_from_file.obj fftw_import_wisdom_from_string.obj fftw_malloc.
obj fftw_one.obj fftw_print_max_memory_usage.obj fftw_print_plan.obj fftw_si
zeof_fftw_real.obj fftw_threads.obj fftw_threads_init.obj fftw_threads_one.ob
j fftw2d_create_plan.obj fftw2d_create_plan_specific.obj fftw3d_create_plan.o
bj fftw3d_create_plan_specific.obj fftwnd.obj fftwnd_create_plan.obj fftwnd_
create_plan_specific.obj fftwnd_destroy_plan.obj fftwnd_fprint_plan.obj fftwn
d_one.obj fftwnd_print_plan.obj fftwnd_threads.obj fftwnd_threads_one.obj rf
ftw.obj rfftw_create_plan.obj rfftw_create_plan_specific.obj rfftw_destroy_pl
an.obj rfftw_executor_simple.obj rfftw_fprint_plan.obj rfftw_one.obj rfftw_p
rint_plan.obj rfftw_threads.obj rfftw_threads_one.obj rfftw2d_create_plan.obj
rfftw2d_create_plan_specific.obj rfftw3d_create_plan.obj rfftw3d_create_plan
_specific.obj rfftwnd_complex_to_real.obj rfftwnd_create_plan.obj rfftwnd_cre
ate_plan_specific.obj rfftwnd_destroy_plan.obj rfftwnd_fprint_plan.obj rfftwn
d_one_complex_to_real.obj rfftwnd_one_real_to_complex.obj rfftwnd_print_plan.o
bj rfftwnd_real_to_complex.obj rfftwnd_threads_complex_to_real.obj rfftwnd_th
reads_one_complex_to_real.obj rfftwnd_threads_one_real_to_complex.obj rfftwnd_
threads_real_to_complex.obj library compiler=msvs PRECISION=MKL_DOUBLE

set include=..\..\include;..\..\include\fftw;%include%
cl /c /MT /DMKL_DOUBLE /Fo"desktop\obj_double_msvs"\ wrappers\fftw.c
Microsoft (R) C/C++ Optimizing Compiler Version 19.10.25017 for x86
Copyright (C) Microsoft Corporation. All rights reserved.

fftw.c
c:\users\yhu5\desktop\mkl example\fftw2xc\fftw2xc\wrappers\fftw2_mkl.h(34): fata
l error C1083: Cannot open include file: 'mkl_dfti.h': No such file or directory

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\cl.EXE"' : return code '
0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.

C:\Users\yhu5\Desktop\mkl example\fftw2xc\fftw2xc>cd C:\Program Files (x86)\Inte
lSWTools\compilers_and_libraries_2018.1.156\windows\mkl\interfaces\fftw2xc

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\m
kl\interfaces\fftw2xc>nmake libintel64 compiler=msvs install_dir=desktop

nmake PLAT=win32e lib ARCH=intel64 compiler=msvs PRECISION=MKL_DOUBLE

if not exist "desktop\obj_double_msvs" md "desktop\obj_double_msvs"
The directory or file cannot be created.
NMAKE : fatal error U1077: 'if' : return code '0x1'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017
\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX86\x86\nmake.EXE"' : return cod
e '0x2'
Stop.

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\m
kl\interfaces\fftw2xc>"C:\Program Files (x86)\IntelSWTools\compilers_and_librari
es_2018.1.156\windows\mkl\bin\mklvars.bat" intel64

It generated folder named obj

elmeliegy__abdelrahm — Fri, 29 Dec 2017 03:11:15 GMT

It generated folder named obj_double_msvs but this folder is empty.

this is my command displays:

C:\Users\aaelmeli\Desktop\fftw2xc>nmake libintel64 compiler=msvs install_dir=desktop

Microsoft (R) Program Maintenance Utility Version 14.12.25831.0

nmake PLAT=win32e lib ARCH=intel64 compiler=msvs PRECISION=MKL_DOUBLE

Microsoft (R) Program Maintenance Utility Version 14.12.25831.0

if not exist "desktop\obj_double_msvs" md "desktop\obj_double_msvs"

nmake fftw.obj fftw_check_memory_leaks.obj fftw_create_plan.obj fftw_create_plan_specific.obj fftw_destroy_plan.obj fftw_die.obj fftw_export_wisdom.obj fftw_export_wisdom_to_file.obj fftw_export_wisdom_to_string.obj fftw_forget_wisdom.obj fftw_fprint_plan.obj fftw_free.obj fftw_import_wisdom.obj fftw_import_wisdom_from_file.obj fftw_import_wisdom_from_string.obj fftw_malloc.obj fftw_one.obj fftw_print_max_memory_usage.obj fftw_print_plan.obj fftw_sizeof_fftw_real.obj fftw_threads.obj fftw_threads_init.obj fftw_threads_one.obj fftw2d_create_plan.obj fftw2d_create_plan_specific.obj fftw3d_create_plan.obj fftw3d_create_plan_specific.obj fftwnd.obj fftwnd_create_plan.obj fftwnd_create_plan_specific.obj fftwnd_destroy_plan.obj fftwnd_fprint_plan.obj fftwnd_one.obj fftwnd_print_plan.obj fftwnd_threads.obj fftwnd_threads_one.obj rfftw.obj rfftw_create_plan.obj rfftw_create_plan_specific.obj rfftw_destroy_plan.obj rfftw_executor_simple.obj rfftw_fprint_plan.obj rfftw_one.obj rfftw_print_plan.obj rfftw_threads.obj rfftw_threads_one.obj rfftw2d_create_plan.obj rfftw2d_create_plan_specific.obj rfftw3d_create_plan.obj rfftw3d_create_plan_specific.obj rfftwnd_complex_to_real.obj rfftwnd_create_plan.obj rfftwnd_create_plan_specific.obj rfftwnd_destroy_plan.obj rfftwnd_fprint_plan.obj rfftwnd_one_complex_to_real.obj rfftwnd_one_real_to_complex.obj rfftwnd_print_plan.obj rfftwnd_real_to_complex.obj rfftwnd_threads_complex_to_real.obj rfftwnd_threads_one_complex_to_real.obj rfftwnd_threads_one_real_to_complex.obj rfftwnd_threads_real_to_complex.obj library compiler=msvs PRECISION=MKL_DOUBLE

Microsoft (R) Program Maintenance Utility Version 14.12.25831.0

set include=..\..\include;..\..\include\fftw;%include%

cl /c /MT /DMKL_DOUBLE /Fo"desktop\obj_double_msvs"\ wrappers\fftw.c

Microsoft (R) C/C++ Optimizing Compiler Version 19.12.25831 for x86

fftw.c

c:\users\aaelmeli\desktop\fftw2xc\wrappers\fftw2_mkl.h(34): fatal error C1083: Cannot open include file: 'mkl_dfti.h': No such file or directory

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX86\x86\cl.EXE"' : return code '0x2'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX86\x86\nmake.EXE"' : return code '0x2'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX86\x86\nmake.EXE"' : return code '0x2'

Stop.

C:\Users\aaelmeli\Desktop\fftw2xc>cd C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\interfaces\fftw2xc

C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\interfaces\fftw2xc>nmake libintel64 compiler=msvs install_dir=desktop

Microsoft (R) Program Maintenance Utility Version 14.12.25831.0

nmake PLAT=win32e lib ARCH=intel64 compiler=msvs PRECISION=MKL_DOUBLE

Microsoft (R) Program Maintenance Utility Version 14.12.25831.0

if not exist "desktop\obj_double_msvs" md "desktop\obj_double_msvs"

The directory or file cannot be created.

NMAKE : fatal error U1077: 'if' : return code '0x1'

Stop.

NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX86\x86\nmake.EXE"' : return code '0x2'

Stop.

I managed to generate this

elmeliegy__abdelrahm — Fri, 29 Dec 2017 17:38:04 GMT

I managed to generate this library "fftw2xc_double_msvs.lib" for example fftw2xc. However, while linking process, it gives me error.

I am using VS 2017 C/C++. I included the name of this file in Additional Dependencies in the Linker menu. Also, i provided the path of this file.

The displayed message as shown.

Severity Code Description Project File Line Suppression State

Error LNK2019 unresolved external symbol WinMain referenced in function "int __cdecl __scrt_common_main_seh(void)" (?__scrt_common_main_seh@@YAHXZ) FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\MSVCRT.lib(exe_winmain.obj) 1

Error LNK2019 unresolved external symbol init_input_and_expected_vectors_c referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Error LNK2019 unresolved external symbol scaling referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Error LNK2019 unresolved external symbol fftw_one referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Error LNK2019 unresolved external symbol fftw_create_plan referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Error LNK2019 unresolved external symbol die_unless referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Error LNK2019 unresolved external symbol check_result_c referenced in function main FFTW2Xtrial2 c:\Users\aaelmeli\source\repos\FFTW2Xtrial2\FFTW2x.obj 1

Warning LNK4272 library machine type 'x86' conflicts with target machine type 'x64' FFTW2Xtrial2 C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\lib\intel64_win\fftw2xc_double_msvs.lib 1

Error LNK1120 7 unresolved externals FFTW2Xtrial2 c:\users\aaelmeli\source\repos\FFTW2Xtrial2\x64\Debug\FFTW2Xtrial2.exe 1

Warning C4305 'initializing': truncation from 'double' to 'float' FFTW2Xtrial2 c:\users\aaelmeli\source\repos\fftw2xtrial2\fftw2x.c 62

Warning C4244 '=': conversion from 'double' to 'float', possible loss of data FFTW2Xtrial2 c:\users\aaelmeli\source\repos\fftw2xtrial2\fftw2x.c 111

Hello,

Ying_H_Intel — Tue, 02 Jan 2018 01:11:00 GMT

Hello,

Sorry for the long message , which may cause you miss the key step:

3. in command line wondows, run the command to set MKL environment :

4. "C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\bin\mklvars.bat" intel64
5. nmake libintel64 compiler=msvs (not msvc) install_dir=desktop

so under command line, please first run

>C:\Users\aaelmeli\Desktop\fftw2xc> "C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.1.156\windows\mkl\bin\mklvars.bat" intel64

Then

>C:\Users\aaelmeli\Desktop\fftw2xc>nmake libintel64 compiler=msvs install_dir=desktop.

In MSVS environment, you may need add mkl library (mkl_intel_lp64.lib mkl_sequential.lib mkl_core.lib) in your Additional Dependencies in the Linker menu. as the discussion in Merry Christmas E1 -- Help me find dgesv

Best Regards,

Ying