[FFmpeg-devel] [PATCH 2/2] avutil/mem_internal: Don't include stdalign.h on MSVC

[Martin Storsjö]

It's currently actually not used in MSVC builds, since
6e49b8699657b808b7dc80033f2c3f2d0e029fa3.

Older versions of MSVC (or, in particular, older versions of UCRT)
don't have stdalign.h; it's available since WinSDK 10.0.22000.0,
shipped along with MSVC 2022 17.4 and newer.

With this change, ffmpeg can still be built with MSVC 2019.
---
I'm not adamant on needing to support older versions of MSVC,
but earlier times when we've raised the required version, it has
been raised after an explicit discussion on it, while this requirement
in 57861911a34e1c33796be97f2b2f44e05fffd647 came rather
implicitly.

E.g., last time this was bumped, in
c00cd007e842b522dc9fbd219e6d32fe9212465b, the requirement was
raised to v19.27 (MSVC 2019 16.7) and in
0d43adcbef9a061c95db60eb351937c27e2a0609 it was further nudged to
require v19.28 (MSVC 2019 16.8).

And since we don't actually use this header on MSVC at the moment,
I thought we can reinstate support for building with older versions
for now.
---
 libavutil/mem_internal.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavutil/mem_internal.h b/libavutil/mem_internal.h
index 2eb4aef5b0..c027fa51c3 100644
--- a/libavutil/mem_internal.h
+++ b/libavutil/mem_internal.h
@@ -24,7 +24,9 @@
 #include "config.h"
 
 #include <stdint.h>
+#ifndef _MSC_VER
 #include <stdalign.h>
+#endif
 
 #include "attributes.h"
 #include "macros.h"
-- 
2.43.0