Date: Wed, 18 Oct 2017 09:52:34 +0200 From: Piotr Kubaj <pkubaj@anongoth.pl> To: Guido Falsi <mad@madpilot.net> Cc: Jan Beich <jbeich@FreeBSD.org>, Kubilay Kocak <koobs@FreeBSD.org>, freebsd-ports@freebsd.org Subject: Re: Debugging ports Message-ID: <20171018075234.GA63797@smtp.iq.pl> In-Reply-To: <4b870afb-152d-7ff4-73b5-cce742858346@madpilot.net> References: <20171017160445.GA31080@smtp.iq.pl> <b612c6d0-41f1-4b6a-b424-033fa567d8bf@madpilot.net> <fa8be1ce-2408-3e5b-619a-d95accc8631e@madpilot.net> <y3o9-31kk-wny@FreeBSD.org> <3bd75024-2458-d06a-afa6-9bb75414ff0d@FreeBSD.org> <o9p5-qdly-wny@FreeBSD.org> <4b870afb-152d-7ff4-73b5-cce742858346@madpilot.net>
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Shouldn't lldb be the replacement for gdb in base?
On 17-10-18 09:47:25, Guido Falsi wrote:
>On 10/18/2017 06:33, Jan Beich wrote:
>> Kubilay Kocak <koobs@FreeBSD.org> writes:
>>
>>> On 10/18/17 8:29 AM, Jan Beich wrote:
>>>
>>>> Guido Falsi <mad@madpilot.net> writes:
>>>>
>>>>> On 10/17/2017 23:11, Guido Falsi wrote:
>>>>>
>>>>>>>
>>>>>>> Thing is, recompiling with WITH_DEBUG doesn't help (I only get
>>>>>>> memory addresses in gdb), nor does -DCMAKE_BUILD_TYPE=3DDebug to
>>>>>>> CMAKE_ARGS (the port uses CMake).
>>>>>
>>>>> Sorry, I clearly did not parse your message correctly.
>>>>>
>>>>> Looks strange though, WITH_DEBUG always worked for me... Usually I
>>>>> compile the whole set in poudriere with WITH_DEBUG, to make sure all
>>>>> libraries have symbols too.
>>>>
>>>> WITH_DEBUG doesn't disable vendor optimizations like -fomit-frame-poin=
ter
>>>> which may hinder stack unwinding, doesn't enable debug symbols for por=
ts
>>>> not respecting CFLAGS, often a nop for non-C/C++ ports, etc.
>>>
>>> Could the framework WITH_DEBUG block remove this (and potentially) other
>>> relevant flags from C*FLAGS if present with variable modifiers?
>>
>> Only for what make(1) inherits when Mk/bsd.port.mk is parsed. A lot more
>> ports pass the option via makefiles under WRKSRC that cannot be altered
>> short of patching or overriding all CFLAGS.
>>
>> To get accurate list of offenders an -exp run WITH_DEBUG=3D1 is required
>> then grep(1) build logs for -fomit-frame-pointer and -O* flags. This can
>> result in bugs against ports that fail to properly respect CFLAGS, so the
>> port maintainers can help with patches.
>
>I'm preparing a patch related to WITH_DEBUG, which, if accepted, will
>need an exp-run before going in.
>
>That would be a good chance to perform a check for these kind of things.
>
>But I'm still working on it and will need a little more time. I'll let
>you know as soon as I have something I am willing to show.
>
>BTW on head gdb is gone from base for i386/amd64 AFAIK, so ports gdb
>will be the only way to go in the future.
>
>--=20
>Guido Falsi <mad@madpilot.net>
>
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