build: Fix Linux X11 ABI mismatch by defining WEBRTC_USE_X11

Author: Gemini Agent

webrtc-jni/src/main/cpp/CMakeLists.txt

@@ -110,7 +110,7 @@ elseif(LINUX)
         set(CXX_LIBS "-static-libgcc")
     endif()
 
-    target_link_libraries(${PROJECT_NAME} ${CXX_LIBS} pulse udev)
+    target_link_libraries(${PROJECT_NAME} ${CXX_LIBS} pulse udev X11 Xfixes Xrandr Xcomposite Xdamage Xtst Xext Xrender)
 elseif(WIN32)
     target_link_libraries(${PROJECT_NAME} dwmapi.lib mf.lib mfreadwrite.lib mfplat.lib mfuuid.lib shcore.lib)
 endif()

webrtc-jni/src/main/cpp/dependencies/webrtc/CMakeLists.txt

@@ -172,7 +172,7 @@ elseif(LINUX)
     pkg_check_modules(DBUS REQUIRED dbus-1)
 
     target_include_directories(${PROJECT_NAME} PUBLIC ${DBUS_INCLUDE_DIRS})
-    target_compile_definitions(${PROJECT_NAME} PUBLIC WEBRTC_LINUX WEBRTC_POSIX WEBRTC_USE_H264)
+    target_compile_definitions(${PROJECT_NAME} PUBLIC WEBRTC_LINUX WEBRTC_POSIX WEBRTC_USE_H264 WEBRTC_USE_X11)
     target_link_libraries(${PROJECT_NAME} X11 Xfixes Xrandr Xcomposite dbus-1)
 elseif(WIN32)
     target_compile_definitions(${PROJECT_NAME} PUBLIC WEBRTC_WIN WEBRTC_USE_H264 NOMINMAX WIN32_LEAN_AND_MEAN NDEBUG)