Re: [PATCH 05/11] gnu: gmp: build shared library for mingw.

[Andy Wingo <wingo@igalia.com>]

On Sun 08 May 2016 22:42, Jan Nieuwenhuizen <janneke@gnu.org> writes:

> * gnu/packages/multiprecision.scm (gmp)[MINGW]: Use --enable-shared.
> ---
>  gnu/packages/multiprecision.scm | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/gnu/packages/multiprecision.scm b/gnu/packages/multiprecision.scm
> index 9924323..8c1a9b7 100644
> --- a/gnu/packages/multiprecision.scm
> +++ b/gnu/packages/multiprecision.scm
> @@ -3,6 +3,7 @@
>  ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
>  ;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
>  ;;; Copyright © 2016 Nicolas Goaziou <mail@nicolasgoaziou.fr>
> +;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
>  ;;;
>  ;;; This file is part of GNU Guix.
>  ;;;
> @@ -49,7 +50,13 @@
>                  '(;; Build a "fat binary", with routines for several
>                    ;; sub-architectures.
>                    "--enable-fat"
> -                  "--enable-cxx")))
> +                  "--enable-cxx"
> +                  ,@(cond ((mingw-target?)
> +                           ;; Static and shared cannot be built in one go:
> +                           ;; they produce different headers.  We need shared.
> +                           `("--disable-static"
> +                             "--enable-shared"))
> +                          (else '())))))
>     (synopsis "Multiple-precision arithmetic library")
>     (description
>      "GMP is a library for arbitrary precision arithmetic, operating on

LGTM.  A bit of a shame that mingw is an abnormal architecture in this
way -- i.e. other targets will have both static and shared libraries,
but not this one.  Oh well, this does look to be the right thing for
now.