bug#27076: [PATCH] build-system/cmake: Add support for cross compilation.

[Ludovic Courtès]

Hi,

Ricardo Wurmus <address@hidden> skribis:

> * guix/build-system/gnu.scm: Export standard-cross-packages.
> * guix/build-system/cmake.scm (cmake-cross-build): New procedure.
> (lower): Add support for cross-builds.
> * guix/build/cmake-build-system.scm (configure): Handle "target" argument.

Awesome!  This also fixes <https://bugs.gnu.org/26897>.

> +                  ;;  Cross-build
> +                  ,@(if target
> +                        (list (string-append "-DCMAKE_C_COMPILER="
> +                                             target "-gcc")
> +                              ;; XXX: Use "Windows" when this is a 
> cross-build
> +                              ;; for Windows.
> +                              "-DCMAKE_SYSTEM_NAME=Linux")
> +                        '())

Should we check whether TARGET contains “mingw”, “linux”, or “gnu” and
adjust that accordingly?

Otherwise LGTM!

Thanks,
Ludo’.