K 10
svn:author
V 4
ngie
K 8
svn:date
V 27
2019-04-12T05:43:01.892114Z
K 7
svn:log
V 347
Take a more relaxed approach to CXXSTD

Only inject `-std=${CXXSTD}` if the value of CXXSTD is not empty.

This satisfies the backwards compatibility of bsd.sys.mk, pre-r345708, and the
aim of CXXSTD in r345708, without having to hardcode nop values and build
unnecessary intelligence of supported C++11 standards in bsd.sys.mk for each
compiler.

END