[Bug target/46770] Replace .ctors/.dtors with .init_array/.fini_array on targets supporting them

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46770

--- Comment #69 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2011-08-20 20:02:21 UTC ---
Author: hjl
Date: Sat Aug 20 20:02:17 2011
New Revision: 177933

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177933
Log:
Use .init_arrary/.fini_array sections if possible.

2011-08-20  H.J. Lu  <hongjiu.lu@intel.com>

    PR other/46770
    * config.gcc (tm_file): Add initfini-array.h if
    .init_arrary/.fini_array are supported.

    * crtstuff.c: Don't generate .ctors nor .dtors sections if
    USE_INITFINI_ARRAY is defined.

    * output.h (default_elf_init_array_asm_out_constructor): New.
    (default_elf_fini_array_asm_out_destructor): Likewise.
    * varasm.c (elf_init_array_section): Likewise.
    (elf_fini_array_section): Likewise.
    (get_elf_initfini_array_priority_section): Likewise.
    (default_elf_init_array_asm_out_constructor): Likewise.
    (default_elf_fini_array_asm_out_destructor): Likewise.

    * config/initfini-array.h: New.

Added:
    trunk/gcc/config/initfini-array.h
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config.gcc
    trunk/gcc/crtstuff.c
    trunk/gcc/output.h
    trunk/gcc/varasm.c