From 5d99b9c5fc1b45ee118b5c4852164a5294aaf420 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois-Simon=20Fauteux-Chapleau?=
 <francois-simon.fauteux-chapleau@savoirfairelinux.com>
Date: Wed, 30 Jul 2025 14:43:05 -0400
Subject: [PATCH] contrib: hide FFmpeg symbols

https://git.jami.net/savoirfairelinux/jami-client-qt/-/issues/1944

Change-Id: Ic85446b5b14dd93d74896245b3a02375d5641bfc
---
 contrib/src/ffmpeg/rules.mak | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/contrib/src/ffmpeg/rules.mak b/contrib/src/ffmpeg/rules.mak
index eff794992..acae7f661 100644
--- a/contrib/src/ffmpeg/rules.mak
+++ b/contrib/src/ffmpeg/rules.mak
@@ -420,6 +420,12 @@ FFMPEGCONF += --target-os=mingw32 \
 	--enable-encoder=hevc_nvenc
 endif
 
+# Prevent the daemon from exposing FFmpeg symbols.
+# This matters for Jami's Qt client because Qt links against FFmpeg and
+# we want to avoid ABI compatibility issues in case the version of FFmpeg
+# expected by Qt is not the same as the one used by the daemon.
+CFLAGS += -fvisibility=hidden
+
 $(TARBALLS)/ffmpeg-$(FFMPEG_HASH).tar.xz:
 	$(call download,$(FFMPEG_URL))