[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

--- Comment #6 from Florian Weimer  ---
Author: fw
Date: Mon Nov  7 19:54:05 2016
New Revision: 241929

URL: https://gcc.gnu.org/viewcvs?rev=241929&root=gcc&view=rev
Log:
PR libgcc/78064: Add missing include directive to unwind-c.c

Backport from mainline
2016-10-24  Florian Weimer  


PR libgcc/78064
* unwind-c.c: Include auto-target.h.

Modified:
branches/gcc-5-branch/   (props changed)
branches/gcc-5-branch/libgcc/ChangeLog
branches/gcc-5-branch/libgcc/unwind-c.c

Propchange: branches/gcc-5-branch/
('svn:mergeinfo' modified)

[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

--- Comment #5 from Florian Weimer  ---
Author: fw
Date: Mon Nov  7 17:08:40 2016
New Revision: 241914

URL: https://gcc.gnu.org/viewcvs?rev=241914&root=gcc&view=rev
Log:
PR libgcc/78064: Add missing include directive to unwind-c.c

Backport from mainline
2016-10-24  Florian Weimer  


PR libgcc/78064
* unwind-c.c: Include auto-target.h.


Modified:
branches/gcc-6-branch/   (props changed)
branches/gcc-6-branch/libgcc/ChangeLog
branches/gcc-6-branch/libgcc/unwind-c.c

Propchange: branches/gcc-6-branch/
('svn:mergeinfo' modified)

[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

Florian Weimer  changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

--- Comment #4 from Florian Weimer  ---
Fixed in 7.0.

[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

--- Comment #3 from Florian Weimer  ---
Author: fw
Date: Mon Oct 24 18:25:09 2016
New Revision: 241491

URL: https://gcc.gnu.org/viewcvs?rev=241491&root=gcc&view=rev
Log:
PR libgcc/78064: Add missing include directive to unwind-c.c

PR libgcc/78064
* unwind-c.c: Include auto-target.h.


Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/unwind-c.c

[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[wilson at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

--- Comment #2 from Jim Wilson  ---
The old configure.ac before the patch breaks this has
 GCC_TARGET_TEMPLATE(HAVE_GETIPINFO)
which prevents the ifndef/endif from being added to config.in.  But this
apparently only works in the gcc dir, and I don't think it can be used after
the changes made by the patch as the configure check moved into the
config/unwind_ipinfo.m4 file.  Including auto-target.h seems to be the simpler
fix.

[Bug libgcc/78064] unwind-c.c never uses _Unwind_GetIPInfo

[wilson at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78064

Jim Wilson  changed:

   What|Removed |Added

 CC||wilson at gcc dot gnu.org

--- Comment #1 from Jim Wilson  ---
I tracked the problem down to bug 27880 comment 31.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27880#c31
The patch is arguably correct, but it changes config.in from
#undef HAVE_GETIPINFO
to
#ifndef USED_FOR_TARGET
#undef HAVE_GETIPINFO#undef HAVE_GETIPINFO
#endif
config.in is used to generate auto-host.h, which is included by unwind-c.c. 
But the new ifndef prevents HAVE_GETIPINFO from being defined in unwind-c.c, as
USED_FOR_TARGET is defined in tconfig.h before auto-host.h is included.

Now that we have an auto-target.h file in libgcc, we can fix the problem by
including that.

This was OK in gcc-4.3, and broken in gcc-4.4 and later.  The libgcc
auto-target.h file appeared in gcc-4.8.  So fixing gcc-4.4 to gcc-4.7 looks a
bit complicated, but anything gcc-4.8 and later looks easy to fix.  We of
course only care about gcc 5 and later at this point.