From: "Kacper Michajłow via ffmpeg-devel" <ffmpeg-devel@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: "Kacper Michajłow" <code@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] configure: suppress C4267 warnings from MSVC (PR #20607)
Date: Thu, 25 Sep 2025 16:24:04 -0000
Message-ID: <175881744744.25.14189967965469397377@bf249f23a2c8> (raw)
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
MIME-Version: 1.0
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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