K 10
svn:author
V 7
linimon
K 8
svn:date
V 27
2019-04-04T17:42:27.705023Z
K 7
svn:log
V 414
MFH: r497858

Conditionalize compiler flags that are specific to clang to fix errors
of the following forms on GCC-based architectures:

  cc1plus: error: unrecognized command line option "-Wno-c++11-narrowing"
  cc1plus: error: unrecognized command line option "-Wno-reserved-user-defined-literal"
  cc1plus: warning: unrecognized command line option '-Wno-error-narrowing'

Approved by:	portmgr (tier-2 blanket)

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