[Bug target/82175] -march=native fails on armv7 big/little system armv7l-unknown-linux-gnueabihf with gcc 8.0.0

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82175

ktkachov at gcc dot gnu.org changed:

   What|Removed |Added

 CC||ktkachov at gcc dot gnu.org,
   ||rearnsha at gcc dot gnu.org

--- Comment #2 from ktkachov at gcc dot gnu.org ---
I think this is related to the option rewrite that Richard did for GCC 8

[Bug target/82175] -march=native fails on armv7 big/little system armv7l-unknown-linux-gnueabihf with gcc 8.0.0

[andrewm.roberts at sky dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82175

--- Comment #1 from Andrew Roberts  ---
This also fails on a Raspberry PI 3 running armv7 in the same way.
Looks like the armv8 code has got mixed up with the armv7 code...

The RPI3 has:
4x ARM Cortex-A53 rev 4 (0x4100d030)

cat /proc/cpuinfo
processor   : 0
model name  : ARMv7 Processor rev 4 (v7l)
BogoMIPS: 38.40
Features: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part: 0xd03
CPU revision: 4
...

It does work ok on a different armv8 (aarch64) system:
Odroid-C2, this uses the same processors as the RPI3, but is running an aarch64
linux OS.
4 x ARM Cortex-A53 rev 4 (0x4100d030)

cat /proc/cpuinfo
processor   : 0
BogoMIPS: 2.00
Features: fp asimd crc32
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part: 0xd03
CPU revision: 4
...

On the ODROID-C2 in aarch64 mode:
/usr/local/gcc/bin/gcc -Q --help=target | grep march
  -march=ARCH   armv8-a