Makefile.android now downloads fftw-3.3.11.tar.gz automatically instead
of requiring the user to place sources in third_party/fftw/ manually.
The FFTW_SRC variable can still be overridden to use an existing copy.
Added distclean target. Updated README accordingly.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
FFTW 3.3.11 has no pre-built Windows binaries, so Makefile.windows now
downloads the source tarball and cross-compiles it twice with MinGW-w64:
once for double precision and once for float (--enable-float), installing
both into third_party/fftw-win64/. Links with -lfftw3/-lfftw3f via
libtool-generated import libs instead of dlltool-generated ones.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Makefile.windows builds libwdsp.dll and libwdsp.a for 64-bit Windows
on Linux. FFTW 3.3.11 Windows binaries are downloaded automatically
from fftw.org and import libraries are generated with dlltool.
README updated with Windows build instructions and FFTW version bump.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
