Our old pkglibtool, which is apparently now deprecated, had a new
option "--cplusplus" to link in cr++t.o with C++ libraries to ensure
that global static contructors were called at the proper time.  Is
this no longer necessary?  If not, then we can't change any of the C++
library packages to USE_LIBTOOL, e.g. devel/boost, */kde*, x11/qt*.

     -- Johnny C. Lam <lamj@stat.cmu.edu>
        Department of Statistics, Carnegie Mellon University
        http://www.stat.cmu.edu/~lamj/