bug#72725: [core-updates] [i686-linux] guile-static fails to build

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

Ricardo Wurmus <rekado@elephly.net> skribis:

> Here is how guile-static fails:
>
>   CCLD     guile
> lto-wrapper: warning: using serial compilation of 22 LTRANS jobs
> ld: /tmp/guix-build-guile-static-3.0.9.drv-0/ccfveS8L.ltrans14.ltrans.o: in function `scm_dlopen':
> /tmp/guix-build-guile-static-3.0.9.drv-0/guile-3.0.9/libguile/<artificial>:78:(.text+0x2d): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
> ld: /tmp/guix-build-guile-static-3.0.9.drv-0/ccfveS8L.ltrans14.ltrans.o: in function `scm_tmpnam':
> /tmp/guix-build-guile-static-3.0.9.drv-0/guile-3.0.9/libguile/posix.c:1757:(.text+0x1f62): warning: the use of `tmpnam' is dangerous, better use `mkstemp'
> ld: /tmp/guix-build-guile-static-3.0.9.drv-0/ccfveS8L.ltrans3.ltrans.o: in function `scm_odd_p':
> /tmp/guix-build-guile-static-3.0.9.drv-0/guile-3.0.9/libguile/numbers.c:490:(.text+0x4a02): undefined reference to `fmod'
> ld: /tmp/guix-build-guile-static-3.0.9.drv-0/ccfveS8L.ltrans3.ltrans.o: in function `scm_even_p':
> /tmp/guix-build-guile-static-3.0.9.drv-0/guile-3.0.9/libguile/numbers.c:517:(.text+0x4af2): undefined reference to `fmod'

The ‘fmod’ symbol is missing from the i686-linux libm.a, but it’s
available in the x86_64 libm-2.39.a:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix shell --pure -s x86_64-linux gcc-toolchain@11{,:static} -- gcc -Wall -O2 fmod.c -lm -static
$ file a.out
a.out: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, for GNU/Linux 3.2.0, not stripped

$ ./pre-inst-env guix shell --pure -s i686-linux gcc-toolchain@11{,:static} -- gcc -Wall -O2 fmod.c -lm -static
ld: /tmp/ccvt0V2Q.o: in function `main':
fmod.c:(.text.startup+0x3c): undefined reference to `fmod'
collect2: error: ld returned 1 exit status
$ cat fmod.c
#include <math.h>
#include <stdlib.h>

int main (int argc, char *argv[])
{
  return fmod (atof (argv[1]), atof (argv[2]));
}
--8<---------------cut here---------------end--------------->8---

I’m not sure why that is the case; i686 seems to be the only one with
that problem.

Ludo’.