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Re: How to make a working ld in guix pure environment?

From: Ludovic Courtès
Subject: Re: How to make a working ld in guix pure environment?
Date: Thu, 24 May 2018 22:38:44 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)


Fis Trivial <address@hidden> skribis:

> I tried to use ld in guix pure environment, tested with bintuils,
> gcc-toolchain, ld-wrapper, and none of them work.
> Take the following trivial snippy (not opencl related) as an example:
> // main.c
> #include <math.h>
> int main()
> {
>   log1p(32);
> }
> To build it, one would do something similar to `ld -lm main.o` after
> compilation. But I got an error saying "ld: cannot find -lm".

You would need to use ld-wrapper, not ld, so that ld-wrapper sets the
RUNPATH appropriately.

But this won’t fix the problem above.  The problem above is that glibc
is not in the search path.  To fix that, a simple fix would be to add a
wrapper atop ld-wrapper (!) that would add “-L /gnu/store/…-glibc/lib”.

Perhaps there are more elegant ways to achieve it though.  How is ld
invoked?  Would it work to add that -L flag directly in the code that
invokes ld?



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