[Bug bootstrap/60160] New: Building with -flto in CFLAGS_FOR_TARGET / CXXFLAGS_FOR_TARGET

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60160

            Bug ID: 60160
           Summary: Building with -flto in CFLAGS_FOR_TARGET /
                    CXXFLAGS_FOR_TARGET
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: d.g.gorbachev at gmail dot com

Created attachment 32115
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32115&action=edit
Tentative patch

Someone might want to build everything with LTO. Currently, I see two problems.

1. crtstuff.c: perhaps it'd be better to compile it with -fno-lto.
2. attribute used for _Unwind_* functions.