Date: Thu, 11 Mar 2010 15:10:12 +0530 From: Shrikanth Kamath <shrikanth07@gmail.com> To: =?ISO-8859-1?B?Qy4gQmVyZ3N0cvZt?= <cbergstrom@pathscale.com> Cc: freebsd-hackers@freebsd.org, =?ISO-8859-1?Q?Marius_N=FCnnerich?= <marius@nuenneri.ch> Subject: Re: ctfconvert dependency... Message-ID: <291941b81003110140h7add81d9w1547b22c9769aca1@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
This DTrace wiki page mandates the CTF option when enabling DTrace, http://wiki.freebsd.org/DTrace#head-41e7ce9a981893f126bd67c0eb77f388e2213d9= d 2010/3/11 "C. Bergstr=F6m" <cbergstrom@pathscale.com> > Marius N=FCnnerich wrote: > >> 2010/3/11 "C. Bergstr=F6m" <cbergstrom@pathscale.com>: >> >> >>> Shrikanth Kamath wrote: >>> >>> >>>> Just trying to understand the build dependency for ctfconvert... >>>> >>>> I see ctfconvert (cddl/usr.bin/ctfconvert/) has dependency on libctf.= a >>>> (cddl/lib/libctf/) >>>> >>>> Now the snippet in bsd.lib.mk has this check for various target >>>> suffixes, >>>> >>>> .c.So: >>>> .if defined(CTFCONVERT) >>>> ${CTFCONVERT} ${CTFFLAGS} ${.TARGET} >>>> .endif >>>> >>>> and sys.mk >>>> >>>> .c >>>> .if defined(CTFCONVERT) >>>> ${CTFCONVERT} ${CTFFLAGS} ${.TARGET} >>>> .endif >>>> >>>> My query, libctf includes <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) >>> When OpenSolaris is built they convert stab debugging information over >>> to >>> CTF (compressed text format?). This is done so that they can have >>> debugging >>> information, but without the overhead of stab (or dwarf2). I don't kno= w >>> 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. (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? The build may depend on it, but this is > probably for legacy reasons only. DTrace in opensolaris isn't dependent = on > it to function correctly. Replace the $(CTFCONVERT) and a few other > utilities with /bin/true and the build will succeed. (I can only speak > first hand from OSUNIX/OpenSolaris though and not FBSD..) >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?291941b81003110140h7add81d9w1547b22c9769aca1>