poppler-0.54.0 Build Failure on NetBSD 6_Stable (gcc version issue?)

[yancm%sdf.org@localhost]

Upon trying to update to latest pkgsrc web2c (which requires
poppler-0.54.0) I receive a fail in the poplar build:

===> Building for poppler-0.54.0
/usr/pkg/bin/gmake  all-recursive
gmake[1]: Entering directory '/usr/pkgsrc/print/poppler/work/poppler-0.54.0'
Making all in goo
gmake[2]: Entering directory
'/usr/pkgsrc/print/poppler/work/poppler-0.54.0/goo'
  CXX      libgoo_la-gfile.lo
cc1plus: error: unrecognized command line option "-std=c++11"

I note native gcc on NetBSD 6_Stable is:
# gcc --version
gcc (NetBSD nb2 20110806) 4.5.3
which does not have a -std=c++11 option per the man page.

It seems like poplar requires a more recent version of gcc, can the
correct pkgsrc gcc version be automated in the build scripts?