> The code for the case in Ada is this: > > /* Ada doesn't feature Fortran-like COMMON variables so we shouldn't > try to fiddle with DECL_COMMON. However, on platforms that don't > support global BSS sections, uninitialized global variables would > go in DATA instead, thus increasing the size of the executable. */ > if (!flag_no_common > && TREE_CODE (var_decl) == VAR_DECL > && TREE_PUBLIC (var_decl) > && !have_global_bss_p ()) > DECL_COMMON (var_decl) = 1; > > That does look like premature optimization to me, but I don't really > understand the comment, or the effect of this code. Eric, could you > please have a look at this and help me out?
Sure, but I don't understand what you don't understand... the comment seems clear enough to me: DECL_COMMON is needed on some platforms if you don't want uninitialized variables to go in DATA. -- Eric Botcazou
