Fixes <https://bugs.gnu.org/27551>.
Reported by Leo Famulari <leo@famulari.name>.
This reinstates the following commits:
e3ddb1e83 * gnu: guile-cairo: Switch to Guile 2.2.
ae5c6ef39 * gnu: guile-gnome: Update to 2.16.5.
0fd8013fc * gnu: guile-rsvg: Update to commit 05c6a2fd.
66b9183c4 * gnu: guile-lib: Switch to Guile 2.2.
and adds the following changes:
* gnu/bootloader/grub.scm (svg->png): Add 'package->derivation' call for
GUILE-2.2. Pass #:guile-for-build to 'gexp->derivation'.
* gnu/build/svg.scm (svg->png): Add 'em' and 'ex' to the 'let-values'
form to account for all the values returned by
'rsvg-handle-get-dimensions', which Guile 2.2 does not truncate.
* gnu/bootloader.scm (<menu-entry>): New variable. Export associated getters,
This record is extracted from grub module.
* gnu/bootloader/extlinux.scm (extlinux-configuration-file): Use
menu-entry->boot-parameters to convert menu-entry records to
boot-parameters.
* gnu/bootloader/grub.scm (<menu-entry>): Remove.
(boot-parameters->menu-entry): Remove.
(grub-configuration-file): Use boot-parameters to create configuration
entries.
* gnu/system.scm (menu-entry->boot-parameters): New exported procedure.
* gnu/bootloader.scm: New file.
* gnu/bootloader/extlinux.scm: New file.
* gnu/bootloader/grub.scm: New file.
* gnu/local.mk: Build new files.
* gnu/system.scm: Adapt to new bootloader api.
* gnu/scripts/system.scm: Adapt to new bootloader api.
* gnu.scm: Remove (gnu system grub) and replace by (gnu bootloader) and (gnu
bootloader grub) modules.
* gnu/system/grub.scm: Moved content to gnu/bootloader/grub.scm.
* gnu/system/vm: Replace (gnu system grub) module by (gnu bootloader).
* gnu/tests.scm: Ditto.
* gnu/tests/nfs.scm: Ditto.
