[Bug lto/52178] [4.7 regression] Ada bootstrap failure in LTO mode

["ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52178

--- Comment #21 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-13 17:06:44 UTC ---
> Yeah.  I'm now getting further with Ada LTO bootstrap, but hit an ICE
> during optimization:
> 
> /space/rguenther/src/svn/trunk/gcc/ada/sem_prag.adb: In function
> 'sem_prag__analyze_pragma':
> /space/rguenther/src/svn/trunk/gcc/ada/sem_prag.adb:383:0: internal compiler
> error: in forward_edge_to_pdom, at tree-ssa-dce.c:1153
> Please submit a full bug report,
> with preprocessed source if appropriate.

OK, thanks, will debug this one.

> when built with --disable-werror, otherwise I'd see errors with warnings like
> 
> ada/b_gnat1.adb:196:7: warning: type of 'locking_policy' does not match
> original declaration [enabled by default]
> In file included from /usr/include/unistd.h:563:0,
>                  from /space/rguenther/src/svn/trunk/gcc/ada/cstreams.c:268,
>                  from /usr/include/stdio.h:188,
>                  from <built-in>:10,
>                  from <built-in>:5,
>                  from <built-in>:78,
>                  from :9:
> /space/rguenther/src/svn/trunk/gcc/ada/init.c:96:7: note: previously declared
> here
> In file included from :101:0:
> 
> The warning appears if the middle-end would not consider the types
> compatible and thus would, for example, assign different alias-sets
> when accessing the decl from the different modules.

-Werror is supposed to have been disabled at link time for Ada though