tzdata: Make /etc/timezone optional

Add INSTALL_TIMEZONE_FILE config variable to enable/disable installation
of ${sysconfdir}/timezone (/etc/timezone) by tzdata packages. Defaults
to "1" to maintain previous behavior.

Most libc implementations can be configured to retrieve system's
defaults timezone from /etc/localtime, and don't need a second file
(/etc/timezone) to express this configuration. Maintaining this file is
an unnecessary burden on sysadmins unless there's software using
/etc/timezone directly (I.e. outside of libc). Some distributions may
choose not to provide it.

Testing: Built tzdata under default config and verified CONFFILES_tzdata
still has both /etc/timezone and /etc/localtime and both are in the
image. Built with INSTALL_TIMEZONE_FILE = "0" and verified /etc/timezone
is removed from CONFFILES_tzdata and the image. Successfully installed
package to an x64 target.

Signed-off-by: Haris Okanovic <haris.okanovic@ni.com>
Reviewed-by: Brad Mouring <brad.mouring@ni.com>
Reviewed-by: Rich Tollerton <rich.tollerton@ni.com>
Reviewed-by: Ken Sharp <ken.sharp@ni.com>
Reviewed-by: Ross Burton <ross.burton@intel.com>
Natinst-ReviewBoard-ID: 121628
Signed-off-by: Ross Burton <ross.burton@intel.com>

0 files changed, 0 insertions, 0 deletions