Stop hardcoding -lstdc++.

Index: configure
--- configure.orig
+++ configure
@@ -20041,53 +20041,6 @@ ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAG
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 
-# Nothing works without these libraries...
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for main in -lstdc++" >&5
-printf %s "checking for main in -lstdc++... " >&6; }
-if test ${ac_cv_lib_stdcpp_main+y}
-then :
-  printf %s "(cached) " >&6
-else case e in #(
-  e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lstdc++  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-namespace conftest {
-  extern "C" int main ();
-}
-int
-main (void)
-{
-return conftest::main ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"
-then :
-  ac_cv_lib_stdcpp_main=yes
-else case e in #(
-  e) ac_cv_lib_stdcpp_main=no ;;
-esac
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS ;;
-esac
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_stdcpp_main" >&5
-printf "%s\n" "$ac_cv_lib_stdcpp_main" >&6; }
-if test "x$ac_cv_lib_stdcpp_main" = xyes
-then :
-  printf "%s\n" "#define HAVE_LIBSTDC__ 1" >>confdefs.h
-
-  LIBS="-lstdc++ $LIBS"
-
-else case e in #(
-  e) as_fn_error $? "libstdc++ not installed" "$LINENO" 5 ;;
-esac
-fi
 
 
 
