Date: Tue, 8 Apr 2014 20:38:20 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Warner Losh <imp@bsdimp.com> Cc: freebsd-arch <freebsd-arch@freebsd.org> Subject: Re: Time for turning off gdb by default? Or worse... Message-ID: <20140409033820.GL34745@funkthat.com> In-Reply-To: <DD38131E-9A43-4EFA-A27D-ED6B64F6A35A@bsdimp.com> References: <DD38131E-9A43-4EFA-A27D-ED6B64F6A35A@bsdimp.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Warner Losh wrote this message on Tue, Apr 08, 2014 at 14:34 -0600:
> The gdb in the tree seems to be of very limited usefulness these days. It doesn?t seem to work on clang-enabled architectures w/o building -gdwarf-2, it doesn?t seem to work with threaded applications, and on some architectures it doesn?t seem to work at all (mips comes to mind, but it may have been the two binaries I tried).
>
> It seems like we?d be doing our users a favor by applying:
>
> diff -r 8bfca9de870e share/mk/bsd.own.mk
> --- a/share/mk/bsd.own.mk
> +++ b/share/mk/bsd.own.mk
> @@ -266,7 +266,6 @@ WITH_HESIOD=
> FREEBSD_UPDATE \
> GAMES \
> GCOV \
> - GDB \
> GNU \
> GNU_GREP_COMPAT \
> GPIB \
> @@ -355,6 +354,7 @@ WITH_HESIOD=
> CLANG_EXTRAS \
> CTF \
> DEBUG_FILES \
> + GDB \
> HESIOD \
> INSTALL_AS_USER \
> LLDB \
>
> to the tree, which will turn gdb off by default. It may make more sense to just remove it entirely, but I?m not sure I want to go there just yet in case there are things that I?m missing. I believe that the port will be adequate for all architectures we support, but haven?t tested this directly yet. I do know that on amd64, the port just worked, where the in-tree gdb was an epic fail.
Does the gdb in ports support cross debugging? Or at least easily?
I don't see anything in the Makefile that implies that it does...
Also, I noticed this:
ONLY_FOR_ARCHS= i386 amd64 powerpc powerpc64 # untested elsewhere, might work
That's missing a lot of archs... Though it looks like 66 might have
better support...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20140409033820.GL34745>