Add the appropriate compiler flags to accept c99 code. This will help to
minimize differences with upstream, and aid porting changes. One change was
necessary in zvol.c because the DEFINE_IDA() macro does not work with the new
compiler flags.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Chunwei Chen <david.chen@osnexus.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes#5756
4a5d7f8267