I’ve been trying to use the multithreaded version of FFTW with fftw_init_threads() etc. After downloading the zip from the windows FFTW page, I tried using these functions but VS2022 said the symbols were unresolved. I looked into installing from source, and ran this command on Ubuntu WSL with MinGW installed :

./configure --disable-alloca --with-our-malloc16 --enable-threads --with-combined-threads --enable-avx --enable-avx2 --disable-fortran --enable-avx512 --enable-generic-simd128 --enable-generic-simd256 --host=x86_64-w64-mingw32 --disable-dependency-tracking --enable-float

followed by make and make install, as stated here. The process generates the DLL for the library. To use this with VS I also need a .lib (or a .def file as per the windows tutorial) file and I couldn’t find this anywhere after the make install. Not sure how to make progress from here.