git: kernel: Add -Wundef to our default kernel warning options.

[Sascha Wildner]

commit f080247663efc4a73b1c6d9fe7f3690008f04749
Author: Sascha Wildner <saw at online.de>
Date:   Sun Nov 18 10:05:32 2018 +0100

    kernel: Add -Wundef to our default kernel warning options.
    
    It will warn when an undefined identifier is evaluated in an "#if"
    directive and would be replaced with zero.
    
    After the last such warnings were fixed in September, we can now do
    this.

Summary of changes:
 sys/conf/bsd.kern.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f080247663efc4a73b1c6d9fe7f3690008f04749


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