From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: CMAKE_LIBRARY_PATH & co.
Date: Mon, 14 Oct 2013 14:31:40 +0200
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In-Reply-To: <20131014072305.GA1965@vicerveza.homeunix.net> (=?utf-8?Q?=22?=
	=?utf-8?Q?Llu=C3=ADs?= Batlle i
	Rossell"'s message of "Mon, 14 Oct 2013 09:23:05 +0200")
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To: =?utf-8?Q?Llu=C3=ADs?= Batlle i Rossell <viric@viric.name>
Cc: guix-devel@gnu.org

Llu=C3=ADs Batlle i Rossell <viric@viric.name> skribis:

> On Mon, Oct 14, 2013 at 09:15:25AM +0200, Ludovic Court=C3=A8s wrote:
>> Andreas Enge <andreas@enge.fr> skribis:
>>=20
>> > commit e78fd4ca636a19bc286747f8d91bda22cd8f08fd
>> > Author: Andreas Enge <andreas@enge.fr>
>> > Date:   Sun Oct 13 18:02:49 2013 +0200
>> >
>> >     guix: Make cmake build system aware of usual paths.
>> >=20=20=20=20=20
>> >     *  guix/build/cmake-build-system.scm (configure): Set CMAKE_LIBRAR=
Y_PATH to
>> >          LIBRARY_PATH and CMAKE_INCLUDE_PATH to CPATH.
>>=20
>> I think this was discussed on IRC yesterday, but I=E2=80=99m not sure I =
got it:
>> are these needed because CMake explicitly looks for files in these
>> directories instead of just running the compiler?
>>=20
>> That would be a serious flaw of CMake.
>
> Right; for what I understand, FIND_LIBRARY, and FIND_PATH, look for files=
 in
> specific directories. Then cmake takes a decision based in what it finds.=
 A
> shared object, a static lib, ...

Blech.

That=E2=80=99s flawed because CMake=E2=80=99s auto-configuration rules beha=
ve
differently from what the compiler/linker actually do.  So its
configuration phase may end up making decisions based on erroneous
information.

Thanks for the explanations,
Ludo=E2=80=99.