AC_DEFUN(AC_PROG_CXX_SUN,
[AC_CACHE_CHECK(whether we are using SUN CC compiler, ac_cv_prog_sun_cxx,
[if AC_TRY_COMMAND(${CXX-g++} -V 2>&1) | egrep "Sun WorkShop" >/dev/null 2>&1; then
  ac_cv_prog_sun_cxx=yes
else
  ac_cv_prog_sun_cxx=no
fi])])