如何修复链接到 dll 的 mex 命令的错误

Question

这是我的 mex 命令：

currentDir = cd;currentDir = regexp(currentDir, filesep, 'split');
ipath = ['-I' fullfile(currentDir{1:end-1},'eigen-3.4.0')];

mex(ipath,lpathFFTW,...
    'CXXFLAGS="$CXXFLAGS -march=native -std=c++14 -fno-math-errno -ffast-math -fopenmp -DNDEBUG"',...
    'LDFLAGS="$LDFLAGS -fopenmp"',...
    'CXXOPTIMFLAGS="-O3"',...
    'computeDASBMode.cpp','computeDAShelper.cpp',...
    '-outdir',outputFolder)

我尝试了以下操作作为 lpathFFTW 的选项，每个试验给出了相应的错误：

试验 1： libfftw3-3.dll 位于目标路径中

lpathFFTW = ['-L' fullfile(currentDir{1:end-1},'fftw-3.3.5-dll64','libfftw3-3.lib')];

错误：

Error using mex
C:\Users\nikun\AppData\Local\Temp\mex_516976837146_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x128b): undefined reference to `__imp_fftw_import_wisdom_from_filename'
C:\Users\nikun\AppData\Local\Temp\mex_516976837146_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x12f0): undefined reference to `__imp_fftw_plan_many_dft'
C:\Users\nikun\AppData\Local\Temp\mex_516976837146_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x135d): undefined reference to `__imp_fftw_export_wisdom_to_filename'
collect2.exe: error: ld returned 1 exit status

试用 2： 使用 matlab 根文件夹中的 fftw 库

lpathFFTW = ['-L',fullfile(matlabroot,'bin',computer('arch'),'libmwfftw3.lib')];

错误：

Error using mex
C:\Users\nikun\AppData\Local\Temp\mex_1088299880810_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x128b): undefined reference to `__imp_fftw_import_wisdom_from_filename'
C:\Users\nikun\AppData\Local\Temp\mex_1088299880810_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x12f0): undefined reference to `__imp_fftw_plan_many_dft'
C:\Users\nikun\AppData\Local\Temp\mex_1088299880810_11436\computeDAShelper.obj:computeDAShelper.cpp:(.text+0x135d): undefined reference to `__imp_fftw_export_wisdom_to_filename'
collect2.exe: error: ld returned 1 exit status

TLDR：我尝试使用 fftw 网站上的 dll 或 matlab 中的 dll 编译链接 FFTW 库的 mex 函数。两者似乎都失败了。

更新 我尝试这样做是为了回应 @Cris Luengo 的评论：

lpathFFTW = ['-L',fullfile(matlabroot,'bin',computer('arch'))];

mex(ipath,lpathFFTW,'-llibmwfftw3.lib',...
    'CXXFLAGS="$CXXFLAGS -march=native -std=c++14 -fno-math-errno -ffast-math -fopenmp -DNDEBUG"',...
    'LDFLAGS="$LDFLAGS -fopenmp"',...
    'CXXOPTIMFLAGS="-O3"',...
    'computeDASBMode.cpp','computeDAShelper.cpp',...
    '-outdir',outputFolder)

产生以下错误：

Error using mex
MEX cannot find library 'libmwfftw3', specified with the -l option.
 MEX searched for a file with one of the following names:
 libmwfftw3.lib
liblibmwfftw3.lib
 Verify the library name is correct. If the library is not
 on the existing path, specify the path with the -L option.

更新 2 我也尝试过这个，但出现以下错误：

lpathFFTW = ['-L',fullfile(matlabroot,'bin',computer('arch'))];

mex(ipath,lpathFFTW,...
    'CXXFLAGS="$CXXFLAGS -march=native -std=c++14 -fno-math-errno -ffast-math -fopenmp -DNDEBUG"',...
    'LDFLAGS="$LDFLAGS -fopenmp"',...
    'LINKLIBS="$LINKLIBS -llibmwfftw3"',...
    'CXXOPTIMFLAGS="-O3"',...
    'computeDASBMode.cpp','computeDAShelper.cpp',...
    '-outdir',outputFolder,'-v')

C:/ProgramData/MATLAB/SupportPackages/R2020b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -llibmwfftw3
collect2.exe: error: ld returned 1 exit status