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Re: PATCH: PR ld/12507: Can't build a program with -flto -nostdlib


On Fri, Feb 25, 2011 at 8:33 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Fri, Feb 25, 2011 at 3:58 PM, Alan Modra <amodra@gmail.com> wrote:
>> On Fri, Feb 25, 2011 at 03:45:14PM -0800, H.J. Lu wrote:
>>> On Fri, Feb 25, 2011 at 3:29 PM, Alan Modra <amodra@gmail.com> wrote:
>>> > It would be better to put the entry symbol, and -u syms on the
>>> > entry_symbol chain, into non_ironly_hash.
>>>
>>> I tried it and it doesn't work.
>>
>> How so?
>>
>>> Also, we only care about the entry symbol for LTO.
>>
>> I'd be a little surprised if there is a good reason to treat -u syms
>> any differently from references in non-ir object files.
>>
>
> This patch works.
>
> --
> H.J.
> ---
> diff --git a/ld/plugin.c b/ld/plugin.c
> index 7892e36..40acbdb 100644
> --- a/ld/plugin.c
> +++ b/ld/plugin.c
> @@ -492,8 +492,7 @@ get_symbols (const void *handle, int nsyms, struct ld_plugin
> _symbol *syms)
> ? ? ? ? symbol is externally visible. ?*/
> ? ? ? ironly = (!is_visible_from_outside (&syms[n], owner_sec, blhe)
> ? ? ? ? ? ? ? ?&& !bfd_hash_lookup (non_ironly_hash, syms[n].name,
> - ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?FALSE, FALSE)
> - ? ? ? ? ? ? ? && strcmp (syms[n].name, entry_symbol.name) != 0);
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?FALSE, FALSE));
>
> ? ? ? /* If it was originally undefined or common, then it has been
> ? ? ? ? resolved; determine how. ?*/
> @@ -838,6 +837,8 @@ plugin_call_cleanup (void)
> ?static void
> ?init_non_ironly_hash (void)
> ?{
> + ?struct bfd_sym_chain *sym;
> +
> ? if (non_ironly_hash == NULL)
> ? ? {
> ? ? ? non_ironly_hash =
> @@ -847,6 +848,12 @@ init_non_ironly_hash (void)
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?sizeof (struct bfd_hash_entry),
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?61))
> ? ? ? ?einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
> +
> + ? ? ?for (sym = &entry_symbol; sym != NULL; sym = sym->next)
> + ? ? ? if (sym->name
> + ? ? ? ? ? && !bfd_hash_lookup (non_ironly_hash, sym->name, TRUE, TRUE))
> + ? ? ? ? einfo (_("%P%X: hash table failure adding symbol %s\n"),
> + ? ? ? ? ? ? ? ?sym->name);
> ? ? }
> ?}
>

I am checking it in.


-- 
H.J.


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