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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH] gnu: Add GCC front ends for Fortran, Go, Objective C,
	and Objective C++.
Date: Fri, 01 Nov 2013 23:41:38 +0100
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In-Reply-To: <87habvq1lo.fsf@karetnikov.org> (Nikita Karetnikov's message of
	"Sat, 02 Nov 2013 01:00:19 +0400")
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To: Nikita Karetnikov <nikita@karetnikov.org>
Cc: guix-devel@gnu.org

Nikita Karetnikov <nikita@karetnikov.org> skribis:

>> =E2=80=98ld-wrapper=E2=80=99 is a wrapper around the linker that adds a =
-rpath argument
>> for each -l argument (see the top of ld-wrapper.scm), such that all the
>> needed libraries are in the resulting binary=E2=80=99s RUNPATH.
>
> Could you show how it helps to avoid the need to set environment
> variables?

In the general case, you wouldn=E2=80=99t want to type:

  export LD_LIBRARY_PATH=3D/nix/store/foo:/nix/store/bar:...

More importantly, you could easily get it wrong, leading to crashes or
random behavior.

Setting RUNPATH at build time allows us to live our computing life in
peace and harmony.

HTH.  :-)

Ludo=E2=80=99.