gnu: virt-viewer: Update to 5.0.

* gnu/packages/spice.scm (virt-viewer): Update to 5.0.

substitute: Work around Guile 2.2 'time-monotonic' bug.

Prior to this change, half of the cached narinfos would expire
immediately since they contained the number of nanoseconds instead of
the number of seconds as their date.

* guix/scripts/substitute.scm (time-monotonic) <guile-2.2>: Define, as a
workaround.

size: Add '--sort=KEY'.

* guix/scripts/size.scm (profile-closure<?, profile-self<?): New
procedures.
(display-profile): Add #:profile<? parameter and honor it.
(show-help, %options): Add '--sort'.
(%default-options): Add 'profile<?'.
(guix-size): Pass PROFILE<? to 'display-profile*'.
* doc/guix.texi (Invoking guix size): Document '--sort'.

environment: Rationalize calls to 'set-build-options'.

Before this change '--substitute-urls' would be ignored.

* guix/scripts/environment.scm (build-environment): Remove redundant
call to 'set-build-options-from-command-line*'.
(guix-environment): Move 'set-build-options-from-command-line' right
after 'with-store'.

gnu: hyperrogue: Update to 9.4n.

* gnu/packages/games.scm (hyperrogue): Update to 9.4n.

build: Make ISO-9660 image bootable from USB flash drive.

* gnu/build/vm.scm (make-iso9660-image): Make image bootable from USB flash
drive.

syscalls: Add network-interface-running?

* guix/build/syscalls.scm (network-interface-running?): New variable.
Export it.
* tests/syscalls.scm: Add test.

Co-authored-by: John Darrington <jmd@gnu.org>

gnu: et: Fix typo in description.

* gnu/packages/ssh.scm (et)[description]: Fix typo.

gnu: man-db: Update to 2.7.6.1 [fixes CVE-2015-1336].

* gnu/packages/man.scm (man-db): Update to 2.7.6.1.
[arguments]: Add '--disable-cache-owner' to #:configure-flags.

gnu: nginx: Update to 1.12.1 [fixes CVE-2017-7529].

* gnu/packages/web.scm (nginx): Update to 1.12.1.

system: Refer to native packages when appropriate.

* gnu/system/locale.scm (localedef-command): Use the native LIBC.
* gnu/system/shadow.scm (default-skeletons): Use the native GUILE-WM.

gnu: shadow: Fix cross-compilation.

* gnu/packages/admin.scm (shadow)[arguments] <set-nscd-file-name>: Refer
to "cross-libc" when cross-compiling.

gnu: inetutils: Allow for cross-compilation.

* gnu/packages/admin.scm (inetutils)[arguments]: Pass
"--with-path-procnet-dev".

gnu: linux-pam: Disable NIS when cross-compiling.

* gnu/packages/linux.scm (linux-pam)[arguments]: Pass "--disable-nis"
when cross-compiling.

gnu: mpg123: Update to 1.25.2 [fixes CVE-2017-10683].

* gnu/packages/mp3.scm (mpg123): Update to 1.25.2.

gnu: Add lollypop.

* gnu/packages/gnome.scm (lollypop): New variable.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

services: elogind: Start from the Shepherd.

Fixes <http://bugs.gnu.org/27580>.
Reported by William <w@vieta.uk>.

* gnu/services/desktop.scm (elogind-shepherd-service): New procedure.
(elogind-service-type): Extend SHEPHERD-ROOT-SERVICE-TYPE.

gnu: hop: Update to 3.1.0-pre2.

* gnu/packages/scheme.scm (hop): Update to 3.1.0-pre2.
[source]: Remove unnecessary patch.
[arguments]: Enable tests; disable parallel building; specify BIGLOO in
make-flags.
[inputs]: Add libgc, libunistring, libuv, pcre and sqlite.
* gnu/local.mk (dist_patch_DATA): Remove unnecessary patch.
* gnu/packages/patches/hop-linker-flags.patch: Delete file.

gnu: bigloo: Update to 4.3a.

* gnu/packages/scheme.scm (bigloo): Update to 4.3a.
[source]: Remove old patch. Add snippet.
[arguments]: Adjust the build phases accordingly.
[inputs]: Add libgc, libunistring, libuv, openssl, pcre and sqlite.

gnu: libpipeline: Update to 1.4.2.

* gnu/packages/man.scm (libpipeline): Update to 1.4.2.