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From: Christian Biesinger <cbiesinger@google.com>
Date: Mon, 19 Oct 2020 19:42:35 +0200
Message-ID: <CAPTJ0XF8XLYh9e3eEhRsV6XoCLbT5PZ1nT0VfqLMLcAaWS-dmA@mail.gmail.com>
Subject: Re: Build Failure on Cygwin
To: joel@rtems.org, Tom Tromey <tom@tromey.com>
Cc: Reuben Thomas via Gdb <gdb@sourceware.org>
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On Mon, Oct 19, 2020 at 7:26 PM Joel Sherrill <joel@rtems.org> wrote:
> 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

I've seen this error on various toolchains. I believe it to be a gcc
bug; however, since it still seems to be an issue on some platforms,
maybe gdb should avoid using global (nonstatic) threadlocal
variables... (and instead abstract access to this variable through
getters/setters)

Christian