[maths] build error: armadillo_bits/sp_auxlib_meat.hpp:1902:38: fatal error: unused parameter 'Xst' [-Wunused-parameter]

[miyanyan]

platform:
win11 + clang

installed armadillo from vcpkg

error:

[build] FAILED: examples/CMakeFiles/hexgrid.dir/hexgrid.cpp.obj 
[build] C:\PROGRA~1\MICROS~1\2022\COMMUN~1\VC\Tools\Llvm\x64\bin\clang.exe -DH5_BUILT_AS_DYNAMIC_LIB -ID:/github/miyanyan/maths -ID:/github/miyanyan/vcpkg/installed/x64-windows/include -g -Wall -Wextra -Wpedantic -pedantic-errors -Werror -Wfatal-errors -Wno-psabi -O3 -fconstexpr-steps=500000000 -DMATHS_HAVE_STD_FORMAT -fopenmp=libomp  -O3 -DNDEBUG -D_DLL -D_MT -Xclang --dependent-lib=msvcrt -std=c++20 -MD -MT examples/CMakeFiles/hexgrid.dir/hexgrid.cpp.obj -MF examples\CMakeFiles\hexgrid.dir\hexgrid.cpp.obj.d -o examples/CMakeFiles/hexgrid.dir/hexgrid.cpp.obj -c D:/github/miyanyan/maths/examples/hexgrid.cpp
[build] In file included from D:/github/miyanyan/maths/examples/hexgrid.cpp:10:
[build] In file included from D:/github/miyanyan/maths\sm/hexgrid:18:
[build] In file included from D:/github/miyanyan/maths\sm/bezcurvepath:26:
[build] In file included from D:/github/miyanyan/maths\sm/bezcurve:30:
[build] In file included from D:/github/miyanyan/vcpkg/installed/x64-windows/include\armadillo:665:
[build] D:/github/miyanyan/vcpkg/installed/x64-windows/include\armadillo_bits/sp_auxlib_meat.hpp:1902:38: fatal error: unused parameter 'Xst' [-Wunused-parameter]
[build]  1902 |   const SpMat<T>& X, const SpMat<T>& Xst, const bool sym,
[build]       |                                      ^
[build] 1 error generated.

this was caused by-Werror option that I changed in sebsjames/maths#10

and armadillo installed from vcpkg didn't define ARMA_USE_ARPACK, and armadillo didn't mark Xst as unused... https://gitlab.com/conradsnicta/armadillo-code/-/blob/14.6.x/include/armadillo_bits/sp_auxlib_meat.hpp?ref_type=heads#L1903

seems the armadillo from vcpkg doesn't have feature arpack