https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69471
--- Comment #13 from ktkachov at gcc dot gnu.org --- Author: ktkachov Date: Thu Sep 26 10:52:42 2019 New Revision: 276148 URL: https://gcc.gnu.org/viewcvs?rev=276148&root=gcc&view=rev Log: driver: Also prune joined switches with negation When -march=native is passed to host_detect_local_cpu to the backend, it overrides all command lines after it. That means $ gcc -march=native -march=armv8-a is treated as $ gcc -march=armv8-a -march=native Prune joined switches with Negative and RejectNegative to allow -march=armv8-a to override previous -march=native on command-line. This is the same fix as was applied for i386 in SVN revision 269164 but for aarch64 and arm. 2019-09-26 Matt Turner <matts...@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: trunk/gcc/ChangeLog trunk/gcc/config/aarch64/aarch64.opt trunk/gcc/config/arm/arm.opt
