WDSP_FPE_GUARD: the macro is defined only in linux_port.h under
#if defined(linux)||defined(__APPLE__). On the _WIN32 path it was
completely undefined. Added a fallback no-op definition in comm.h
guarded by #ifndef so it applies to Windows (and any future platform
that doesn't include linux_port.h).
volatile int* vs volatile LONG*: Win32 Interlocked functions expect
volatile LONG* (= volatile long*). The dispatcher field is volatile int.
On Windows LLP64 both are 32-bit so the operation is correct, but GCC 14
promotes this mismatch from warning to error. Suppressed with
-Wno-incompatible-pointer-types in Makefile.windows, consistent with
how MSVC handles it silently.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
On Linux (case-sensitive filesystem) MinGW-w64 installs the header as
windows.h (lowercase) while comm.h included <Windows.h> (capital W),
causing a fatal compile error when cross-compiling for Windows.
Changed to <windows.h> which works on both Linux/MinGW-w64 and native
Windows/MSVC (Windows header includes are case-insensitive on NTFS).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
gcc-mingw-w64-x86-64 on Debian/Ubuntu ships only the compiler binary,
without Windows API headers — causing fatal error: Windows.h not found.
The fix is to install the mingw-w64 meta-package which includes headers,
CRT and runtime libraries.
Added a check-tools probe that compiles #include <windows.h> and prints
a clear error with the correct package name if headers are missing.
Updated README with a warning about the incomplete package.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Without CC=, autoconf issues "using cross tools not prefixed with host
triplet" because it cannot match the detected compiler against --host.
Passing CC=$(MINGW_PREFIX)-gcc directly resolves the ambiguity.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
With -jN, make started third-party and fftw targets in parallel.
libspecbleach depended on FFTW_HEADER which has no explicit rule
(it is a side effect of make install), causing 'No rule to make target'.
Object compilation also could start before FFTW headers were ready.
Fix: depend on FFTW_LIB_D (has an explicit rule) instead of FFTW_HEADER,
and add FFTW_LIB_D as order-only prerequisite for .o compilation.
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>
