Oh i see… you mean simply replacing \ with / and no other changes?
UPDATE:
Seems like a bigger error?
Atomic operations not found
Looking for DftiCreateDescriptor
WARNING: Target “cmTC_da0cf” requests linking to directory “C:/Program Files (x86)/IntelSWTools/compilers_and_libraries_2020.1.216/windows/mkl/lib/intel64_win”. Targets may link only to libraries. CMake is dropping the item.
WARNING: Target “cmTC_da0cf” requests linking to directory “C:/Program Files (x86)/IntelSWTools/compilers_and_libraries_2020.1.216/windows/mkl/lib/intel64_win”. Targets may link only to libraries. CMake is dropping the item.
WARNING: Target “cmTC_da0cf” requests linking to directory “C:/Program Files (x86)/IntelSWTools/compilers_and_libraries_2020.1.216/windows/mkl/lib/intel64_win”. Targets may link only to libraries. CMake is dropping the item.
WARNING: Target “cmTC_da0cf” requests linking to directory “C:/Program Files (x86)/IntelSWTools/compilers_and_libraries_2020.1.216/windows/mkl/lib/intel64_win”. Targets may link only to libraries. CMake is dropping the item.
Looking for DftiCreateDescriptor - not found
CMake Error at cmake/gmxManageFFTLibraries.cmake:173 (message):
Linking with MKL was requested, but was not successful: The include path to
mkl.h in MKL_INCLUDE_DIR, and the link libraries in
MKL_LIBRARIES=C:/Program Files
(x86)/IntelSWTools/compilers_and_libraries_2020.1.216/windows/mkl/lib/intel64_win
need to match what the MKL documentation says you need for your system: Use
full paths to library files, in the right order, and separated by
semicolons.
Call Stack (most recent call first):
CMakeLists.txt:715 (include)
Configuring incomplete, errors occurred!
See also “C:/My Software/gromacs-2020.2/build/CMakeFiles/CMakeOutput.log”.
See also “C:/My Software/gromacs-2020.2/build/CMakeFiles/CMakeError.log”.