From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: (dynamic-link "libm") doesn't work on guile
Date: Fri, 08 Jan 2016 14:51:21 +0100
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In-Reply-To: <87bn8w9r89.fsf@gmail.com> (Alex Vong's message of "Fri, 08 Jan
	2016 20:43:18 +0800")
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To: Alex Vong <alexvong1995@gmail.com>
Cc: help-guix@gnu.org

Alex Vong <alexvong1995@gmail.com> skribis:

> I think it is weird. It seems only dynamic linking with "libc" or "libm"
> fails, dynamic linking with external library like "libpcre2-8" or
> anyhome-made shared library would work. And yes, "libc-2.22" and
> "libm-2.22" also works for me.

I think that=E2=80=99s because libm.so and libc.so are linker scripts, wher=
eas
libm-2.22.so and libc-2.22.so are the actual ELF files:

--8<---------------cut here---------------start------------->8---
$ cat ~/.guix-profile/lib/libm.so
/* GNU ld script
*/
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /gnu/store/qv7bk62c22ms9i11dhfl71hnivyc82k2-glibc-2.22/lib/libm.so.=
6  AS_NEEDED ( /gnu/store/qv7bk62c22ms9i11dhfl71hnivyc82k2-glibc-2.22/lib/l=
ibmvec.so.1 ) )
$ cat ~/.guix-profile/lib/libc.so
/* GNU ld script
   Use the shared library, but some functions are only in
   the static library, so try that secondarily.  */
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /gnu/store/qv7bk62c22ms9i11dhfl71hnivyc82k2-glibc-2.22/lib/libc.so.=
6 /gnu/store/qv7bk62c22ms9i11dhfl71hnivyc82k2-glibc-2.22/lib/libc_nonshared=
.a  AS_NEEDED ( /gnu/store/qv7bk62c22ms9i11dhfl71hnivyc82k2-glibc-2.22/lib/=
ld-linux-x86-64.so.2 ) )
--8<---------------cut here---------------end--------------->8---

Ludo=E2=80=99.