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* [Bug lto/48108] New: lto should be containerized in a single mach-o section on darwin
@ 2011-03-14  3:07 howarth at nitro dot med.uc.edu
  2011-03-14  3:10 ` [Bug lto/48108] " howarth at nitro dot med.uc.edu
                   ` (25 more replies)
  0 siblings, 26 replies; 27+ messages in thread
From: howarth at nitro dot med.uc.edu @ 2011-03-14  3:07 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48108

           Summary: lto should be containerized in a single mach-o section
                    on darwin
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: howarth@nitro.med.uc.edu


The LTO support on darwin has been disabled...

Author: mrs
Date: Mon Mar 14 02:47:49 2011
New Revision: 170929

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170929
Log:
2011-03-13  Jack Howarth  <howarth@bromo.med.uc.edu>

        PR lto/48086
        * configure.ac: Disable LTO on darwin due to an assembler change in
        Xcode 3.2.6/4.0 that limits the total number of sections/segments to
        under 256.
        * configure: Regenerate.

Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac

due to the mishandling of <rdar://problem/7920267>, possible assembler bug
exposed by LTO, by the Apple assembler developer where a solid 255 limit has
been now imposed on all the sections= possible in a mach-o object file. This
breaks the current implementation in gcc/lto/lto-object.c which relied on the
ability to have an unlimited number of symbol-less GNU_LTO sections at the end
of the object file.
   The darwin LTO support in  gcc/lto/lto-object.c  and gcc/config/darwin.c
needs to be written to containerize all of these GNU_LTO sections into a single
mach-o section. Hopefully this can be done without having to resort to an elf
container, which would introduce an undesired dependency on libelf for FSF gcc
on darwin.


^ permalink raw reply	[flat|nested] 27+ messages in thread
end of thread, other threads:[~2011-11-13 14:01 UTC | newest]

Thread overview: 27+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-03-14  3:07 [Bug lto/48108] New: lto should be containerized in a single mach-o section on darwin howarth at nitro dot med.uc.edu
2011-03-14  3:10 ` [Bug lto/48108] " howarth at nitro dot med.uc.edu
2011-03-14  3:13 ` mikestump at comcast dot net
2011-03-14  9:01 ` iains at gcc dot gnu.org
2011-03-14 11:26 ` [Bug target/48108] " rguenth at gcc dot gnu.org
2011-03-14 23:34 ` mikestump at comcast dot net
2011-03-17 12:04 ` howarth at nitro dot med.uc.edu
2011-05-30 12:11 ` vincenzo.innocente at cern dot ch
2011-05-30 12:26 ` dominiq at lps dot ens.fr
2011-05-30 12:58 ` vincenzo.innocente at cern dot ch
2011-05-30 13:12 ` dominiq at lps dot ens.fr
2011-05-30 15:17 ` howarth at nitro dot med.uc.edu
2011-05-30 15:22 ` howarth at nitro dot med.uc.edu
2011-05-30 16:02 ` iains at gcc dot gnu.org
2011-07-07 10:23 ` iains at gcc dot gnu.org
2011-07-08 10:34 ` iains at gcc dot gnu.org
2011-07-08 11:20 ` howarth at nitro dot med.uc.edu
2011-07-10  4:41 ` fang at csl dot cornell.edu
2011-08-05 18:52 ` howarth at nitro dot med.uc.edu
2011-08-09 12:59 ` iains at gcc dot gnu.org
2011-09-25  9:57 ` iains at gcc dot gnu.org
2011-09-26  2:16 ` howarth at nitro dot med.uc.edu
2011-09-27 14:56 ` howarth at nitro dot med.uc.edu
2011-10-26 12:39 ` iains at gcc dot gnu.org
2011-10-26 13:29 ` howarth at nitro dot med.uc.edu
2011-11-13 16:10 ` iains at gcc dot gnu.org
2011-11-13 16:11 ` iains at gcc dot gnu.org

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