[Bug libc/22362] Installed crt1.o, crti,.o and crtn.o files are used with -m32

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22362

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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=abcb584d0eae7270b35e1b3fed1f9661e26b8be0

commit abcb584d0eae7270b35e1b3fed1f9661e26b8be0
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Nov 6 08:29:48 2017 -0800

    Use newly built crt*.o files to build shared objects [BZ #22362]

    When multi-lib GCC is used to build glibc, the search order of GCC driver
    for crt*.o is -B*/`gcc -print-multi-directory`, the installed diretory,
    -B*/.  This patch adds multi-lib support to csu/Makefile so that
    -B/glibc-build-directory/csu/ will pick up the newly built crt*.o.

    Tested on x86-64 for i686 and x32.

        [BZ #22362]
        * Makerules (make-link-multidir): New.
        * config.make.in (multidir): New.
        * configure.ac (libc_cv_multidir): New.  AC_SUBST.
        * configure: Regenerated.
        * csu/Makefile [$(multidir) != .](multilib-extra-objs): New.
        [$(multidir) != .](extra-objs): Add $(multilib-extra-objs).
        [$(multidir) != .]($(addprefix $(objpfx)$(multidir)/, $(install-lib))):
        New target.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog      |   12 ++++++++++++
 Makerules      |    9 +++++++++
 config.make.in |    1 +
 configure      |    6 ++++++
 configure.ac   |    5 +++++
 csu/Makefile   |   10 ++++++++++
 6 files changed, 43 insertions(+), 0 deletions(-)

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