From 99c21787cbbbde7ca1eb57abc8e7e3b3101eeb6d Mon Sep 17 00:00:00 2001
From: Antoine Damhet <antoine.damhet@lse.epita.fr>
Date: Tue, 10 Sep 2019 00:24:05 +0200
Subject: Support the new `SetBrightness` logind API

This API from `org.freedesktop.login1.Session` allows an unprivileged
user with an active session to change its own backlight.

Systemd >= v243 is needed.

Signed-off-by: Antoine Damhet <antoine.damhet@lse.epita.fr>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index f324efd..22ff475 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,12 @@ INSTALL_UDEV_RULES = 1
 INSTALL_UDEV_1 = install_udev_rules
 UDEVDIR ?= /lib/udev/rules.d
 
+ifdef ENABLE_SYSTEMD
+	CFLAGS += ${shell pkg-config --cflags libsystemd}
+	LDLIBS += ${shell pkg-config --libs libsystemd}
+	CPPFLAGS += -DENABLE_SYSTEMD
+endif
+
 MODE_0 = 4711
 MODE_1 = 0755
 MODE = ${MODE_${INSTALL_UDEV_RULES}}
-- 
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