package/qt5/qt5base: add -syslog option

QT can default to outputting the logs to syslog instead of to the
console with this compile time switch. That behavior can still be
overridden by setting the environment variable QT_LOGGING_TO_CONSOLE to
1.

Signed-off-by: Jeff Zignego <jzignego@hedcontrols.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qt5/qt5base/Config.in

@@ -263,6 +263,11 @@ config BR2_PACKAGE_QT5BASE_PNG
 
 endif
 
+config BR2_PACKAGE_QT5BASE_SYSLOG
+	bool "syslog support"
+	help
+	  Logs to the standard UNIX logging mechanism.
+
 config BR2_PACKAGE_QT5BASE_DBUS
 	bool "DBus module"
 	depends on BR2_TOOLCHAIN_HAS_THREADS

package/qt5/qt5base/qt5base.mk

@@ -254,6 +254,12 @@ else
 QT5BASE_CONFIGURE_OPTS += -no-journald
 endif
 
+ifeq ($(BR2_PACKAGE_QT5BASE_SYSLOG),y)
+QT5BASE_CONIGURE_OPTS += -syslog
+else
+QT5BASE_CONFIGURE_OPTS += -no-syslog
+endif
+
 ifeq ($(BR2_PACKAGE_IMX_GPU_VIV),y)
 # use vivante backend
 QT5BASE_EGLFS_DEVICE = EGLFS_DEVICE_INTEGRATION = eglfs_viv