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doc: Document our stance on Windows ARM64EC

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Explicitly spell it out that we are not going to modify the
individual libraries for the purposes of improving conformance
to ARM64EC.

We may (or may not) accept build system patches for making such
a build succeed, provided that it does not require changes to
the actual library code.
This commit is contained in:
Martin Storsjö
2025-12-16 00:39:51 +02:00
parent 1c35a1b79b
commit 087f46674a
1 changed files with 16 additions and 0 deletions
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doc/platform.texi
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@@ -330,4 +330,20 @@ and for a build with shared libraries
./configure --target-os=mingw32 --enable-shared --disable-static --extra-cflags=-mno-cygwin --extra-libs=-mno-cygwin
@end example
@section ARM64EC
FFmpeg does not intend to support the Windows ARM64EC build configuration;
patches for changing the individual libraries for the purposes of ARM64EC will
not be accepted.
It may still be possible to build FFmpeg in this build configuration;
such a build may seem to work to some extent. Such a build may have some
amounts of ABI inconsistencies though - which we are not willing to fix.
(Changing aarch64 assembly code to strictly support ARM64EC would require
ifdeffing/changing essentially all such assembly code, and would be a
huge maintenance burden. Additionally, changing the library ABI
surfaces to fix ABI inconsistencies could require extensive and intrusive
changes.)
@bye