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Date:      Tue, 8 Jul 2014 19:36:48 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Warner Losh <imp@bsdimp.com>
Cc:        Baptiste Daroussin <bapt@FreeBSD.org>, sbruno@FreeBSD.org, Ian Lepore <ian@FreeBSD.org>, freebsd-arch@FreeBSD.org
Subject:   Re: Total confusion over toolchain/xdev behavior
Message-ID:  <A7CE5DAD-C093-4E09-B048-A2CDC51DB0E0@FreeBSD.org>
In-Reply-To: <A2E7E324-C885-4D84-8928-86F5926C0434@bsdimp.com>
References:  <1404688077.1059.115.camel@bruno> <1404766292.65432.43.camel@revolution.hippie.lan> <20B72004-1499-4F99-A7C7-13173C50C7C6@bsdimp.com> <20140707235237.GG97203@ivaldir.etoilebsd.net> <DB29AF3B-C761-4112-A4F6-6CF20159C2E1@bsdimp.com> <B94CB4F3-FA56-4B17-A4DD-A6F28F521A9C@bsdimp.com> <67272C53-1908-454A-8E74-14D9A2EA0828@FreeBSD.org> <C6150667-388D-4091-975F-A8BD16FD5625@bsdimp.com> <A2E7E324-C885-4D84-8928-86F5926C0434@bsdimp.com>

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On 08 Jul 2014, at 18:23, Warner Losh <imp@bsdimp.com> wrote:
>=20
> On Jul 8, 2014, at 9:04 AM, Warner Losh <imp@bsdimp.com> wrote:
>=20
>>=20
>> On Jul 8, 2014, at 12:56 AM, Dimitry Andric <dim@FreeBSD.org> wrote:
>>=20
>>> On 08 Jul 2014, at 03:56, Warner Losh <imp@bsdimp.com> wrote:
>>>=20
>>>>=20
>>>> On Jul 7, 2014, at 7:29 PM, Warner Losh <imp@bsdimp.com> wrote:
>>>>>=20
>>>>> About the rest=85 Yea, you may be right=85.  MK_GNUCXX is an odd =
duck, and that=92s
>>>>> likely the problem that should be fixed in a different way. It is =
really an internal
>>>>> variable that should be set based on the actual compiler type =
(possibly with an
>>>>> override for the odd-duck pair of clang and libstdc++ which may =
not be worth
>>>>> supporting). It is telling us we=92re doing something horribly =
wrong and we should listen
>>>>> to that rather than add another compiler-related kludge to the =
build system.  I=92ll work
>>>>> on that bit.
>>>>=20
>>>> Perhaps
>>>> 	http://people.freesbd.org/~imp/patch-queue/86gnucxx
>>>> might be the best way to cope=85
>>>>=20
>>>> Comments?
>>>=20
>>> This would make it impossible to build libstdc++ with clang, and why =
remove MK_GNUCXX at all[1]?
>>=20
>> Because it is a silly option that=92s mostly an internal knob? We =
don=92t need to support options that trip us up at every turn, and =
MK_GNUCXX has been doing that since its introduction.
>=20
> Also, in the current tree it means different things in different =
places. In some places it says to build libstdc++, in other places it =
says to build g++ and friends.

This was an oddity introduced by theraven@ in r255321, where he =
introduced MK_GNUCXX, but I have no idea why he conflated the two.  =
Before this commit, I had a local patch which simply added an option =
disabling or enabling libstdc++ and libsupc++ (and nothing else).  I =
should have committed that first... :)

In any case, it would be nice to still have the option to enable =
building libstdc++, whatever the used compiler is.

-Dimitry


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