Re: [ptxdist] [PATCH] systemd: add setting to enable ldconfig service

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Thu, May 19, 2016 at 07:05:51PM +0200, Clemens Gruber wrote:
> Add a ptxdist setting to enable the systemd ldconfig.service, which
> calls /sbin/ldconfig -X if /etc/ld.so.cache does not exist and the
> machine boots or was updated.
> Having a /etc/ld.so.cache file reduces the number of necessary syscalls
> dramatically. This is especially noticeable when often calling small
> binaries like /bin/true.
> See: LD_DEBUG=libs /bin/true or strace /bin/true

Not like this. This should be handled in rc-once where the rootfs is
actually writeable. Also, as far as I know, there is currently no option to
install ldconfig. You should probably with a patch for this.

Michael

> Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
> ---
>  rules/systemd.in   | 7 +++++++
>  rules/systemd.make | 2 +-
>  2 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/rules/systemd.in b/rules/systemd.in
> index 876a890..fba72bc 100644
> --- a/rules/systemd.in
> +++ b/rules/systemd.in
> @@ -73,6 +73,13 @@ config SYSTEMD_DISABLE_RANDOM_SEED
>  	  the random seed is not possible.
>  	  Warning: enabling this option may be insecure.
>  
> +config SYSTEMD_LDCONFIG
> +	bool
> +	prompt "enable ldconfig to initialize /etc/ld.so.cache"
> +	help
> +	  Enables ldconfig.service, which calls ldconfig at first boot and after
> +	  systemd-update-done if /etc/ld.so.cache does not exist.
> +
>  config SYSTEMD_LOGIND
>  	bool
>  	select SYSTEMD_DBUS
> diff --git a/rules/systemd.make b/rules/systemd.make
> index 71c633a..776942d 100644
> --- a/rules/systemd.make
> +++ b/rules/systemd.make
> @@ -121,7 +121,7 @@ SYSTEMD_CONF_OPT	:= \
>  	--$(call ptx/endis,PTXCONF_UDEV_HWDB)-hwdb \
>  	--disable-manpages \
>  	--disable-hibernate \
> -	--disable-ldconfig \
> +	--$(call ptx/endis,PTXCONF_SYSTEMD_LDCONFIG)-ldconfig \
>  	--enable-split-usr \
>  	--disable-tests \
>  	--disable-debug \
> -- 
> 2.8.2
> 
> 
> _______________________________________________
> ptxdist mailing list
> ptxdist@pengutronix.de

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
ptxdist mailing list
ptxdist@pengutronix.de