On 3/31/2019 8:12 PM, Stephen Hutchinson wrote:
--- The text has been updated to reflect that 32-bit builds of FFmpeg in general don't default to AviSynth+GCC compatibility. doc/general.texi | 15 +++++++++++++++ 1 file changed, 15 insertions(+)diff --git a/doc/general.texi b/doc/general.texi index bafa1e2ea2..6c1acb517c 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -51,6 +51,21 @@ 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+In 2016, AviSynth+ added support for building with GCC. However, due to +the eccentricities of Windows' calling conventions, 32-bit GCC builds +of AviSynth+ are not compatible with typical 32-bit builds of FFmpeg. + +By default, FFmpeg assumes compatibility with 32-bit MSVC builds of +AviSynth+ since that is the most widely-used and entrenched build +configuration. Users can override this and enable support for 32-bit +GCC builds of AviSynth+ by passing @code{-DAVSC_WIN32_GCC32} to +@code{--extra-cflags} when configuring FFmpeg. + +64-bit builds of FFmpeg are not affected, and can use either MSVC or +GCC builds of AviSynth+ without any special flags. +@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
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