[Bug driver/69471] "-march=native" unintentionally breaks further -march/-mtune flags

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69471

--- Comment #14 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Oct  1 10:28:40 2019
New Revision: 276397

URL: https://gcc.gnu.org/viewcvs?rev=276397&root=gcc&view=rev
Log:
driver: Also prune joined switches with negation

2019-10-01  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

        Backport from mainline
        2019-09-26  Matt Turner  <mattst88@gmail.com>

        PR driver/69471
        * config/aarch64/aarch64.opt (march=): Add Negative(march=).
        (mtune=): Add Negative(mtune=).
        (mcpu=): Add Negative(mcpu=).
        * config/arm/arm.opt: Likewise.

Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/config/aarch64/aarch64.opt
    branches/gcc-9-branch/gcc/config/arm/arm.opt