Build Failure on Cygwin

[Joel Sherrill]

Hi

I am getting a build failure on Cygwin

/home/jrs007/rtems-cron-6/rtems-source-builder/rtems/build/aarch64-rtems6-gdb-8a6e98c-x86_64-pc-cygwin-1/build/gdb/../../sourceware-mirror-binutils-gdb-8a6e98c/gdb/cp-support.c:1619:(.text+0x5502):
relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS
init function for thread_local_segv_handler'
/home/jrs007/rtems-cron-6/rtems-source-builder/rtems/build/aarch64-rtems6-gdb-8a6e98c-x86_64-pc-cygwin-1/build/gdb/../../sourceware-mirror-binutils-gdb-8a6e98c/gdb/cp-support.c:1619:(.text+0x551b):
relocation truncated to fit: R_X86_64_PC32 against undefined symbol `TLS
init function for thread_local_segv_handler'
collect2: error: ld returned 1 exit status

This is a build targeting RTEMS based on a tarball fetched from
git:(sourceware-mirror-binutils-gdb-8a6e98c). It should correspond to this
recent commit:

ommit 8a6e98c4a3049d7fb8ffc24b231e8cf3577fd90a
Author: GDB Administrator <gdbadmin@sourceware.org>
Date:   Mon Oct 12 00:00:07 2020 +0000

    Automatic date update in version.in

Any suggestions on how to fix this?

--joel