[Bug ld/30724] cygwin ld performance regression since 014a602b86

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30724

--- Comment #10 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Alan Modra <amodra@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f82ee0c8dc4ee32556e23e6cd83ef083618f704f

commit f82ee0c8dc4ee32556e23e6cd83ef083618f704f
Author: Alan Modra <amodra@gmail.com>
Date:   Mon Aug 7 08:28:55 2023 +0930

    PR30724, cygwin ld performance regression since 014a602b86

    According to the reporter of this bug the newlib fseek implementation
    is likely slowed down by locking and fflush, only attempting to
    optimise seeks when the file is opened read-only.  Thus when writing
    the output we get a dramatic slowdown due to commit 014a602b86.

            PR 30724
            * bfd.c (enum bfd_last_io): New.
            (struct bfd): Add last_io field.
            * bfd-in2.h: Regenerate.
            * bfd-io.c (bfd_bread, bfd_bwrite): Force seek if last_io is
            opposite direction.
            (bfd_seek): Reinstate optimisation for seek to same position.

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