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Subject:	Re: Which is it -pc- or -unknown-
To:	cygwin AT cygwin DOT com
References:	<a9cce58b-13c4-510e-e93a-188ac407d95c AT gmail DOT com> <59e939fc DOT 21539d0a DOT 6c79e DOT 530e AT mx DOT google DOT com>
From:	Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
Message-ID:	<54f3b5d4-bc4d-f03e-5c7b-0f983f0783e8@cygwin.com>
Date:	Thu, 19 Oct 2017 20:11:33 -0500
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From: Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <54f3b5d4-bc4d-f03e-5c7b-0f983f0783e8 AT cygwin DOT com>
Subject: Re: Which is it -pc- or -unknown-
References: <a9cce58b-13c4-510e-e93a-188ac407d95c AT gmail DOT com>
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On 2017-10-19 18:49, Steven Penny wrote:
> On Thu, 19 Oct 2017 17:00:12, cyg Simple wrote:
>> So says you!=C2=A0 The vendor portion has been agreed to be -pc- and it =
isn't
>> -unknown-, a patch then should be created for config.guess to match the
>> agreed upon vendor.=C2=A0 The config.guess script supplies the default to
>> configure for the build and host.=C2=A0 The fact that config.guess suppl=
ies
>> x86_64-unknown-cygwin is used by configure is the reason my assumptions
>> are correct.=C2=A0 If -pc- should be used then config.guess needs to cha=
nge.
>=20
> Let us bring some sanity to this discussion/argument. With this repositor=
y:
>=20
> =C2=A0=C2=A0 git clone --depth 1 git://github.com/php/php-src
> =C2=A0=C2=A0 cd php-src
> =C2=A0=C2=A0 ./buildconf
>=20
> Test 1:
>=20
> =C2=A0=C2=A0 $ ./configure --host x86_64-pc-cygwin
> =C2=A0=C2=A0 checking build system type... x86_64-unknown-cygwin
> =C2=A0=C2=A0 checking host system type... x86_64-pc-cygwin
> =C2=A0=C2=A0 checking for x86_64-pc-cygwin-gcc... x86_64-pc-cygwin-gcc
> =C2=A0=C2=A0 checking whether the C compiler works... yes

Two things wrong with this:

1) If you specify --host, you need to specify --build as well.
2) If you're not cross-compiling or building a toolchain package, you
shouldn't be specifying either.

> Test 2:
>=20
> =C2=A0=C2=A0 $ ./configure --host x86_64-unknown-cygwin
> =C2=A0=C2=A0 checking build system type... x86_64-unknown-cygwin
> =C2=A0=C2=A0 checking host system type... x86_64-unknown-cygwin
> =C2=A0=C2=A0 checking for x86_64-unknown-cygwin-gcc... no
> =C2=A0=C2=A0 checking for cc... cc
> =C2=A0=C2=A0 checking whether the C compiler works... yes
>=20
> So yes, specifying "--host x86_64-unknown-cygwin" causes it to not find
> "x86_64-unknown-cygwin-gcc.exe", which makes sense because that doesnt
> exist.

True, when you *need* to specify --build/--host, then x86_64-pc-cygwin
should be used.  When not (as in this case), then omit them.

--=20
Yaakov


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