[Bug target/100856] Arm: Multilib mapping is missing for CDE arguments.

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100856

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by SRINATH PARVATHANENI
<sripar01@gcc.gnu.org>:

https://gcc.gnu.org/g:85f85b7e62aacc6abae475932cf483a4c80176ce

commit r11-8620-g85f85b7e62aacc6abae475932cf483a4c80176ce
Author: Srinath Parvathaneni <srinath.parvathaneni@arm.com>
Date:   Fri Jun 18 13:21:51 2021 +0100

    arm: Fix multilib mapping for CDE extensions [PR100856].

    On passing +cdecp[0-7] extension to the -march string in command line
options,
    multilib linking is failing as mentioned in PR100856. This patch fixes this
issue by
    generating a separate canonical string by removing compiler options which
are not
    required for multilib linking from march string and assign the new string
to mlibarch
    option. This mlibarch string is used for multilib comparison.

    gcc/ChangeLog:

    2021-06-10  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

            PR target/100856
            * common/config/arm/arm-common.c (arm_canon_arch_option_1): New
function
            derived from arm_canon_arch.
            (arm_canon_arch_option): Call it.
            (arm_canon_arch_multilib_option): New function.
            * config/arm/arm-cpus.in (IGNORE_FOR_MULTILIB): New fgroup.
            * config/arm/arm.h (arm_canon_arch_multilib_option): New prototype.
            (CANON_ARCH_MULTILIB_SPEC_FUNCTION): New macro.
            (MULTILIB_ARCH_CANONICAL_SPECS): New macro.
            (DRIVER_SELF_SPECS): Add MULTILIB_ARCH_CANONICAL_SPECS.
            * config/arm/arm.opt (mlibarch): New option.
            * config/arm/t-rmprofile (MULTILIB_MATCHES): For armv8*-m, replace
use
            of march on RHS with mlibarch.

    gcc/testsuite/ChangeLog:

    2021-06-10  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

            PR target/100856
            * gcc.target/arm/acle/pr100856.c: New test.
            * gcc.target/arm/multilib.exp: Add tests for cde options.

    (cherry picked from commit f58d03b5df25f9eab06b7eacea8da780fc2e0219)