Hello,

I'm using the current Buildroot master branch after the 2022.08 release and after the merge of the next branch that include a ARM toolchain version bump to 11.2-2022.02.

This toolchain trigger some "Illegal instruction" error on some x86_64 host like Intel(R) Xeon(R) CPU X5670.

gfortran is not able to pass the check in helper.mk:

<built-in>: internal compiler error: Illegal instruction
0x7f42c83efd5f ???
	./signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7f42c83dad09 __libc_start_main
	../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.

Disabling gfortran allows to continue the build but it break with busybox build with similar errors:

free(): invalid next size (fast)
editors/awk.c: In function ‘parse_expr’:
editors/awk.c:608:21: internal compiler error: Aborted
  608 | #define G (*(struct globals2 *)ptr_to_globals)
      |                     ^~~~~~~~
editors/awk.c:642:23: note: in expansion of macro ‘G’
  642 | #define t_info       (G.t_info      )
      |                       ^
editors/awk.c:1406:41: note: in expansion of macro ‘t_info’
 1406 |                 cn = vn->r.n = new_node(t_info);
      |                                         ^~~~~~

during GIMPLE pass: strlen
networking/tc.c: In function ‘cbq_print_opt.isra’:
networking/tc.c:234:12: internal compiler error: Illegal instruction
  234 | static int cbq_print_opt(struct rtattr *opt)
      |            ^~~~~~~~~~~~~

free(): invalid pointer
during GIMPLE pass: ssa
coreutils/sort.c: In function ‘bb_ascii_toupper’:
coreutils/sort.c:648:1: internal compiler error: Aborted
  648 | }
      | ^

0x7f107f6b2d5f ???
	./signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7f107f6b2ce1 __GI_raise
	../sysdeps/unix/sysv/linux/raise.c:51
0x7f107f69c536 __GI_abort
	./stdlib/abort.c:79
0x7f107f6f5767 __libc_message
	../sysdeps/posix/libc_fatal.c:155
0x7f107f6fca59 malloc_printerr
	./malloc/malloc.c:5347
0x7f107f6fdc13 _int_free
	./malloc/malloc.c:4173
0x7f107f69dd09 __libc_start_main
	../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://bugs.linaro.org/> for instructions.

It happen with the arm and aarch64 target.

Tested with Intel(R) Core(TM) i7-10850H cpu doesn't trigger such problem.

Best regards,
Romain