[Bug bootstrap/91833] New: [AArch64] LSE atomics depends on glibc specific sys/auxv.h

[pexu@gcc-bugzilla.mail.kapsi.fi]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91833

            Bug ID: 91833
           Summary: [AArch64] LSE atomics depends on glibc specific
                    sys/auxv.h
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: build
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pexu@gcc-bugzilla.mail.kapsi.fi
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-none-elf
             Build: x86_64-linux-gnu

Hi.

libgcc/config/aarch64/lse-init.c includes <sys/auxv.h> (in order to determine
hardware features).  As that is a glibc specific header, its presence should be
checked.  If the header is not provided by the used (target) libc
implementation, bootstrapping will fail.