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[Bug target/40483] gcc 4.x needs to utilize better COMDAT mechanism under Solaris

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40483

--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> 2011-05-19 14:29:11 UTC ---
Author: ro
Date: Thu May 19 14:29:05 2011
New Revision: 173913

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173913
Log:
    PR target/40483
    * configure.ac (gcc_cv_as_comdat_group_group): Check for Sun as
    COMDAT group syntax, both SPARC and x86 variants.
    (HAVE_COMDAT_GROUP): Also define if gcc_cv_as_comdat_group_group.
    * configure: Regenerate.
    * config/sol2.h (TARGET_SOLARIS): Define.
    (PUSHSECTION_FORMAT): Remove.
    (SECTION_NAME_FORMAT): Define.
    * config/sol2.c: Include hashtab.h.
    (solaris_output_init_fini): Replace PUSHSECTION_FORMAT by its
    expansion, using SECTION_NAME_FORMAT.
    (solaris_comdat_htab): New variable.
    (struct comdat_entry): Define.
    (comdat_hash): New function.
    (comdat_eq): New function.
    (solaris_elf_asm_comdat_section): New function.
    (solaris_define_comdat_signature): New function.
    (solaris_code_end): New function.
    * config/sol2-protos.h (solaris_elf_asm_comdat_section): Declare.
    (solaris_code_end): Declare.
    * config/t-sol2 (sol2.o): Add $HASHTAB_H dependency.
    * config/i386/i386.c (ix86_code_end) [TARGET_SOLARIS]: Call
    solaris_code_end.
    (i386_solaris_elf_named_section): Wrap in TARGET_SOLARIS.
    Remove ATTRIBUTE_UNUSED.
    [!USE_GAS]: Call solaris_elf_asm_comdat_section for
    SECTION_LINKONCE sections if HAVE_COMDAT_GROUP.
    * config/sparc/sparc.c (sparc_solaris_elf_asm_named_section):
    Likewise.
    * config/i386/sol2-10.h (TARGET_ASM_NAMED_SECTION): Moved ...
    * config/i386/sol2.h (TARGET_ASM_NAMED_SECTION): ... here.
    * config/sparc/sol2.h (TARGET_ASM_CODE_END): Redefine.
    (PUSHSECTION_FORMAT): Remove.
    (SECTION_NAME_FORMAT): Redefine.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/sol2-10.h
    trunk/gcc/config/i386/sol2.h
    trunk/gcc/config/sol2-protos.h
    trunk/gcc/config/sol2.c
    trunk/gcc/config/sol2.h
    trunk/gcc/config/sparc/sol2.h
    trunk/gcc/config/sparc/sparc.c
    trunk/gcc/configure
    trunk/gcc/configure.ac
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