Date: Thu, 6 Nov 2014 07:35:16 -0700 From: Warner Losh <imp@bsdimp.com> To: Baptiste Daroussin <bapt@freebsd.org> Cc: Konstantin Belousov <kostikbel@gmail.com>, arch@freebsd.org, "Simon J. Gerraty" <sjg@juniper.net> Subject: Re: Overlinking in base Message-ID: <0A3B2AAE-91A7-4F79-BC3C-2463E3AF6C68@bsdimp.com> In-Reply-To: <20141106130555.GP10388@ivaldir.etoilebsd.net> References: <20141105113839.GG10388@ivaldir.etoilebsd.net> <20141105125431.GD53947@kib.kiev.ua> <20141105125931.GJ10388@ivaldir.etoilebsd.net> <20141105133029.GH53947@kib.kiev.ua> <20141105134006.GL10388@ivaldir.etoilebsd.net> <3912.1415233494@chaos> <20141106130555.GP10388@ivaldir.etoilebsd.net>
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On Nov 6, 2014, at 6:05 AM, Baptiste Daroussin <bapt@freebsd.org> wrote:
> On Wed, Nov 05, 2014 at 04:24:54PM -0800, Simon J. Gerraty wrote:
>> Baptiste Daroussin <bapt@freebsd.org> wrote:
>>> In the second case we could do it via make(1)
>>> LIBADD=3D liba libc libc
>>> this will open something like a ${PATHTOTHELIB}/link.mk which will =
define
>>> DYNAMIC_ADD
>>> STATIC_ADD
>>>=20
>>> And this could be recursive.
>>=20
>> We do something like that in the Junos build
>>=20
>> prog makefile might have DPLIBS+=3D ${LIBFOO}
>> which is exactly equivalent to
>>=20
>> LDADD+=3D -lfoo
>> DPADD+=3D ${LIBFOO}
>>=20
>> but ensures that they stay in sync (not so important now with meta
>> mode).
>>=20
>> bsd.libnames.mk can then have
>>=20
>> DPLIBS_libfoo +=3D ${LIBGOO}
>> DPLIBS_libgoo +=3D ${LIBZOO}
>>=20
>> All of which is processed by dpadd.mk which you can find in
>> contrib/bmake/mk
>> Though dpadd.mk ignores DPLIBS_libgoo +=3D ${LIBZOO} if LIBZOO has =
already
>> been added.
>>=20
> I'am about to add something based on the following principle:
> https://people.freebsd.org/~bapt/plop.diff
>=20
> With a bit more changes
>=20
> The version I have now (a bit different from the patch now :)) allows =
multiple
> things:
>=20
> 1/ simplify the Makefile for users:
> LIBADD=3D m archive util
> instead of
> DPADD=3D ${LIBM} ${LIBARCHIVE} ${LIBUTIL}
> LDADD=3D -lm -larchive -lutil
>=20
> 2/ ensure dependencies are automatically tracked
> For example -lucl needs -lm adding LIBADD=3D ucl does the magic by =
itself
>=20
> 3/ allow to build any single binary statically so far I'm able to =
build
> everything is bin sbin usr.bin and usr.sbin statically (which wasn't =
doable
> before)
>=20
> 3/ hides the private/internal lib from the final user
> Do more need to say USEPRIVATELIB because I do use a libunbound it is =
automatic
Generally I like this.
One issue though about dependencies: Is there a tool to manage them? How =
do we know if things are wrong?
Will a simple buildworld always detect that, or do we need to do a =
buildworld with static linking?
Warner
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