Windows.Clang.toolchain.cmake doesn't cross-compile correctly - it only ever compiles to the same target as the version of clang that is being executed. So if using an x64 version of clang, the 'obj' ...

# './compile_macos_clang.sh' or './compile_macos_clang.sh d' from the ngspice directory. # Options: # KLU, OSDI, and XSPICE may be deselected at will. # ngspice as shared library: # Replace --with-x ...