AC_CHECK_PROG(RUBY, ruby, ruby)

if test -z "$RUBY"; then
  DO_NOT_COMPILE="$DO_NOT_COMPILE qtruby"
else
  AC_MSG_CHECKING(for ruby dirs)
  RUBY_ARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"archdir"@:>@)'`
  RUBY_SITEARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitearchdir"@:>@)'`
  RUBY_SITEDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitelibdir"@:>@)'`
  RUBY_LIBDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"libdir"@:>@)'`
  RUBY_LIBRUBYARG=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`
  AC_MSG_RESULT([archdir $RUBY_ARCHDIR, sitearchdir $RUBY_SITEARCHDIR, sitedir $RUBY_SITEDIR, libdir $RUBY_LIBDIR, librubyarg $RUBY_LIBRUBYARG])
  AC_SUBST(RUBY_ARCHDIR)
  AC_SUBST(RUBY_SITEARCHDIR)
  AC_SUBST(RUBY_SITEDIR)
  AC_SUBST(RUBY_LIBDIR)
  AC_SUBST(RUBY_LIBRUBYARG)
fi