Error related to GCC LTO optimization for GMP at ARM AArch64

[Torbjörn Granlund]

Some One <gluker at gmail.com> writes:

  I've found the problem related to GCC LTO optimization for GMP for ARM
  aarch64
  under QEMU with ARM Neoverse-N1 virt-4.2 (Oracle Cloud) and ARM virt-7.2
  (Apple M1)
  both running the latest Gentoo with gmp-6.2.1-r5 compiled by both
  gcc version 11.3.1 20221209 and gcc version 12.2.1 20221231.

  To reproduce:
  1. Compile GMP with LTO optimization -- compiles OK
  2. Try to compile iproute2-6.1.0 or cmake-3.25.1 -- compilation hangs
  during the process

  Disabling LTO optimization for GMP solves the problem.

I would not expect any GMP developer to attempt to reproduce this
problem.  You're using a patched GMP ("-r5") in an environment which
would be very close to impossible to reproduce!

You need to isolate this problem and only then report it to the package
maintainer of the buggy program.

-- 
Torbjörn
Please encrypt, key id 0xC8601622