https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72076
--- Comment #2 from Thorsten Hirsch <t.hirsch at web dot de> --- In that case it might be a problem of Arch's multilib, which is their way of allowing 32bit compilations on x64, see [1] and [2]. So my gcc package is called gcc-multilib, which includes (depends on) the 32bit package of glibc, thus I've installed packages for both architectures. And I have 2 gmp packages: $ pacman -Q | grep -i gmp gmp 6.1.1-1 lib32-gmp 6.1.0-2 (I just checked if there's version 6.1.1 for 32bit, but it's not available, yet.) So... should I open a bug for gcc-multilib? Can you give me a hint about what I should tell the package maintainer of gcc-multilib? [1] https://www.archlinux.org/packages/multilib/x86_64/gcc-multilib [2] https://wiki.archlinux.org/index.php/Multilib