From 9a03f045963143e7a8a776503048fcd985190edf Mon Sep 17 00:00:00 2001
From: Jonathan Liu <net147@gmail.com>
Date: Wed, 17 Jun 2026 18:07:01 +1000
Subject: [PATCH] CMake: don't export turbojpeg symbols

If an application links to both libvncserver and libjpeg-turbo (either
directly or indirectly through another library), it can cause the
application to unexpectedly call the libvncserver implementation
instead of the libjpeg-turbo implementation.

Avoid this by not exporting the turbojpeg symbols.

Fixes https://github.com/LibVNC/libvncserver/issues/729
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9709c809..75ad31f19 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -389,6 +389,10 @@ set(LIBVNCCLIENT_SOURCES
     ${CRYPTO_SOURCES}
 )
 
+if(UNIX)
+  set_source_files_properties(${COMMON_DIR}/turbojpeg.c PROPERTIES COMPILE_OPTIONS "-fvisibility=hidden")
+endif()
+
 if(JPEG_FOUND)
   set(LIBVNCCLIENT_SOURCES
     ${LIBVNCCLIENT_SOURCES}