[Bug ld/25849] Many ELF backends generate zero-sized sections

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=25849

--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by H.J. Lu <address@hidden>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6f6fd151cbf226bbaa66e44977f57b7c6dc33d89

commit 6f6fd151cbf226bbaa66e44977f57b7c6dc33d89
Author: H.J. Lu <address@hidden>
Date:   Tue Apr 21 05:23:51 2020 -0700

    elf: Strip zero-sized dynamic sections

    ELF size_dynamic_sections is called by the ELF backend linker after all
    the linker input files have been seen but before the section sizes have
    been set.  After the sections sizes have been set, target-specific,
    global optimizations may make some dynamic sections zero-sized if they
    are no longer needed.

    Add ELF strip_zero_sized_dynamic_sections so that ELF backend linker can
    strip zero-sized dynamic sections after the sections sizes have been set.

    bfd/

            PR ld/25849
            * elf-bfd.h (elf_backend_data): Add
            elf_backend_strip_zero_sized_dynamic_sections.
            (_bfd_elf_strip_zero_sized_dynamic_sections): New prototype.
            * elf64-alpha.c (elf_backend_strip_zero_sized_dynamic_sections):
            New macro.
            * elflink.c (_bfd_elf_strip_zero_sized_dynamic_sections): New
            function.
            * elfxx-target.h (elf_backend_strip_zero_sized_dynamic_sections):
            New macro.
            (elfNN_bed): Add elf_backend_strip_zero_sized_dynamic_sections.

    ld/

            PR ld/25849
            * ldelfgen.c (ldelf_map_segments): Call
            elf_backend_strip_zero_sized_dynamic_sections.
            * testsuite/ld-alpha/tlsbinr.rd: Updated.

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