[FFmpeg-devel] [PATCH] configure: suppress C4267 warnings from MSVC (PR #20607)

[FFmpeg-devel] [PATCH] configure: suppress C4267 warnings from MSVC (PR #20607)

[Kacper Michajłow via ffmpeg-devel]

PR #20607 opened by Kacper Michajłow (kasper93)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20607
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20607.patch

Suppresses implicit integer conversion narrowing warnings:
warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data

Those implicit conversions are abundant in ffmpeg's code base.
Additionally equivalent warnings are not enabled for GCC/Clang by
default, so they are mostly left unfixed.

Suppress reports about them to reduce noise in MSVC build log.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>


From 56b683419f28f2685e2ba9febd69c7c969ba6d44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kacper=20Michaj=C5=82ow?= <kasper93@gmail.com>
Date: Thu, 25 Sep 2025 18:19:29 +0200
Subject: [PATCH] configure: suppress C4267 warnings from MSVC
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Suppresses implicit integer conversion narrowing warnings:
warning C4267: 'initializing': conversion from 'size_t' to 'int', possible loss of data

Those implicit conversions are abundant in ffmpeg's code base.
Additionally equivalent warnings are not enabled for GCC/Clang by
default, so they are mostly left unfixed.

Suppress reports about them to reduce noise in MSVC build log.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index c4e16ff97e..a01f0fbba4 100755
--- a/configure
+++ b/configure
@@ -5020,7 +5020,7 @@ msvc_flags(){
     for flag; do
         case $flag in
             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
-                                       -wd4554 ;;
+                                       -wd4554 -wd4267 ;;
             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
                                        -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
                                        -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
-- 
2.49.1

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