Date: Thu, 11 Mar 2010 10:41:02 +0100 From: =?UTF-8?Q?Marius_N=C3=BCnnerich?= <marius@nuenneri.ch> To: =?UTF-8?Q?C=2E_Bergstr=C3=B6m?= <cbergstrom@pathscale.com> Cc: freebsd-hackers@freebsd.org, Shrikanth Kamath <shrikanth07@gmail.com> Subject: Re: ctfconvert dependency... Message-ID: <b649e5e1003110141r57e9c502p41bfa69f256430ce@mail.gmail.com> In-Reply-To: <4B98B8C6.6010309@pathscale.com> References: <291941b81003100954n276d467an234c24e28f3b28e5@mail.gmail.com> <4B989DD6.601@pathscale.com> <b649e5e1003110119n2e18552bva7514913e6e3f0ee@mail.gmail.com> <4B98B8C6.6010309@pathscale.com>
next in thread | previous in thread | raw e-mail | index | archive | help
2010/3/11 "C. Bergstr=C3=B6m" <cbergstrom@pathscale.com>:
> Marius N=C3=BCnnerich wrote:
>>
>> 2010/3/11 "C. Bergstr=C3=B6m" <cbergstrom@pathscale.com>:
>>
>>>
>>> Shrikanth Kamath wrote:
>>>
>>>>
>>>> Just trying to understand the build dependency for ctfconvert...
>>>>
>>>> I see ctfconvert (cddl/usr.bin/ctfconvert/) =C2=A0has dependency on li=
bctf.a
>>>> (cddl/lib/libctf/)
>>>>
>>>> Now the snippet in bsd.lib.mk has this check for various target
>>>> suffixes,
>>>>
>>>> .c.So:
>>>> .if defined(CTFCONVERT)
>>>> =C2=A0 =C2=A0 =C2=A0 ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
>>>> .endif
>>>>
>>>> and sys.mk
>>>>
>>>> .c
>>>> .if defined(CTFCONVERT)
>>>> =C2=A0 =C2=A0 =C2=A0 ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
>>>> .endif
>>>>
>>>> My query, libctf includes =C2=A0<bsd.lib.mk> in it's Makefile, so will=
the
>>>> above
>>>> not try to
>>>> run 'ctfconvert' on libctf itself?
>>>>
>>>>
>>>
>>> I'm going to make some assumptions and go out on a limb here..
>>>
>>> The CDDL code in FBSD came from OpenSolaris (specifically onnv-gate hg
>>> repo)
>>> =C2=A0When OpenSolaris is built they convert stab debugging information=
over
>>> to
>>> CTF (compressed text format?). =C2=A0This is done so that they can have
>>> debugging
>>> information, but without the overhead of stab (or dwarf2). =C2=A0I don'=
t know
>>> how
>>> much of the original onnv-gate Makefiles came over from OpenSolaris, bu=
t
>>> assuming the FBSD kernel doesn't need/use CTF format this dependency ca=
n
>>> and
>>> probably should go away. =C2=A0(Only (k)mdb supports CTF that I'm aware=
of?)
>>>
>>> Hopefully this is useful information and I'm not too wrong or someone
>>> will
>>> correct me
>>>
>>
>> The CTF information is needed by DTrace.
>> My guess is that it will run ctfconvert on itself so it should be
>> there from a prior install or it is part of some early toolchain
>> stuff.
>>
>
> CTF is needed by DTrace where? =C2=A0The build may depend on it, but this=
is
> probably for legacy reasons only. =C2=A0DTrace in opensolaris isn't depen=
dent on
> =C2=A0it to function correctly. =C2=A0Replace the $(CTFCONVERT) and a few=
other
> utilities with /bin/true and the build will succeed. =C2=A0(I can only sp=
eak
> first hand from OSUNIX/OpenSolaris though and not FBSD..)
The build will succeed but dtracing something with the FBT provider won't.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?b649e5e1003110141r57e9c502p41bfa69f256430ce>