@@ -51,6 +51,16 @@ For Windows, supported AviSynth variants are
For Linux and OS X, the supported AviSynth variant is
@url{https://github.com/avxsynth/avxsynth, AvxSynth}.
+@float NOTE
+Due to the eccentricities of Windows' calling conventions, 32-bit GCC builds
+of AviSynth+ are not compatible with typical 32-bit GCC builds of FFmpeg.
+
+Support for 32-bit GCC builds of AviSynth+ can be enabled by passing
+@code{-DAVSC_WIN32_GCC32} to @code{--extra-cflags}. However, doing so will
+make the resulting build of FFmpeg incompatible with typical 32-bit MSVC
+builds of AviSynth+.
+@end float
+
@float NOTE
AviSynth and AvxSynth are loaded dynamically. Distributors can build FFmpeg
with @code{--enable-avisynth}, and the binaries will work regardless of the