From: Marcin Niestroj <m.niestroj@grinn-global.com>
Date: Fri, 15 Apr 2016 10:46:30 +0000 (+0200)
Subject: package/systemd: Optionally disable hwdb
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=42f9d9e37b8e9195e29754e383960886a9460f58;p=buildroot.git

package/systemd: Optionally disable hwdb

By default hwdb files are installed in /usr/lib/udev/hwdb.d
Currently they take about ~5MB. After first boot, systemd-hwdb tool
parses them and creates a binary in /etc/udev/hwdb.bin, which takes
another ~6.5MB.

In case of initramfs images, hwdb parsing is done every boot. This adds
about 2-3 seconds to boot time in case of rootfs on SDHC class 10
card (benchmarked with am335x board). NAND boot takes even longer.

Add config option to disable hwdb in systemd, for smaller images and
better boot performance.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---

diff --git a/package/systemd/Config.in b/package/systemd/Config.in
index 97d48c4124..324e884489 100644
--- a/package/systemd/Config.in
+++ b/package/systemd/Config.in
@@ -84,6 +84,17 @@ config BR2_PACKAGE_SYSTEMD_JOURNAL_GATEWAY
 
 	  http://www.freedesktop.org/software/systemd/man/systemd-journal-gatewayd.service.html
 
+config BR2_PACKAGE_SYSTEMD_HWDB
+	bool "enable hwdb installation"
+	default y
+	help
+	  Enables hardware database installation to /usr/lib/udev/hwdb.d
+
+	  Disabling this option improves first boot time (or every boot
+	  time in case of initramfs images) and saves several MB space.
+
+	  https://www.freedesktop.org/software/systemd/man/hwdb.html
+
 config BR2_PACKAGE_SYSTEMD_BINFMT
 	bool "enable binfmt tool"
 	help
diff --git a/package/systemd/systemd.mk b/package/systemd/systemd.mk
index b5253973c6..c0503ae921 100644
--- a/package/systemd/systemd.mk
+++ b/package/systemd/systemd.mk
@@ -129,6 +129,12 @@ else
 SYSTEMD_CONF_OPTS += --disable-microhttpd
 endif
 
+ifeq ($(BR2_PACKAGE_SYSTEMD_HWDB),y)
+SYSTEMD_CONF_OPTS += --enable-hwdb
+else
+SYSTEMD_CONF_OPTS += --disable-hwdb
+endif
+
 ifeq ($(BR2_PACKAGE_SYSTEMD_BINFMT),y)
 SYSTEMD_CONF_OPTS += --enable-binfmt
 else