Hi.
This patch handles the lto-wrapper failure seen on multiple packages in
openSUSE OBS w/ -flto. It's explained here in more details:
https://sourceware.org/bugzilla/show_bug.cgi?id=23079
The patch is approved by Honza, I'm going to install it.
Martin
gcc/lto/ChangeLog:
2018-04-19 Martin Liska <mli...@suse.cz>
* lto-symtab.c (lto_symtab_resolve_symbols): Do not bail out
for multiple PREVAILING_DEF_IRONLY for common symbols.
---
gcc/lto/lto-symtab.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/gcc/lto/lto-symtab.c b/gcc/lto/lto-symtab.c
index 2660542300e..3663ab7a9b2 100644
--- a/gcc/lto/lto-symtab.c
+++ b/gcc/lto/lto-symtab.c
@@ -466,9 +466,14 @@ lto_symtab_resolve_symbols (symtab_node *first)
/* If the chain is already resolved there is nothing else to do. */
if (prevailing)
{
- /* Assert it's the only one. */
+ /* Assert it's the only one.
+ GCC should silence multiple PREVAILING_DEF_IRONLY defs error
+ on COMMON symbols since it isn't error.
+ See: https://sourceware.org/bugzilla/show_bug.cgi?id=23079. */
for (e = prevailing->next_sharing_asm_name; e; e = e->next_sharing_asm_name)
if (lto_symtab_symbol_p (e)
+ && !DECL_COMMON (prevailing->decl)
+ && !DECL_COMMON (e->decl)
&& (e->resolution == LDPR_PREVAILING_DEF_IRONLY
|| e->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP
|| e->resolution == LDPR_PREVAILING_DEF))
