gcc/testsuite/gnat.dg/specs/linker_alias.ads

-- { dg-do compile }
-- { dg-skip-if "missing alias support" { *-*-darwin* hppa*-*-hpux* } }

package Linker_Alias is

   Var : Integer;  -- { dg-error "aliased to undefined symbol" }
   pragma Export (C, Var, "my_var");
   pragma Linker_Alias (Var, "var2");

end Linker_Alias;