There is a bug in gcc since 4.3.2 and still not fixed in 8.1.0.
Even if __attribute__((format(strftime... is specified for a
wrapper function around strftime, gcc still complains about strftime
being called from the wrapper with a "non-literal" format argument.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39438
This commit adds 'ugly hacks' from that discussion to call strftime()
from strftime-formatted wrappers and silence the warnings.
Partially resolvesipmitool/ipmitool#23
Signed-off-by: Alexander Amelkin <alexander@amelkin.msk.ru>
4f05b95f6c