gnu: libxkbcommon: Add inputs libx11 and xkeyboard-config and use
  corresponding configure flags.

* gnu/packages/qt.scm (libxkbcommon): Add inputs libx11 and xkeyboard-config.
    Use configure flags to set XKB config root and X11 locale root
    directories.

gnu: qt: Add input ruby.

* gnu/packages/qt.scm (qt): Add input ruby.

gnu: Add AVR-Libc.

* gnu/packages/avr.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add avr.scm.
* gnu/packages/cross-base.scm (xgcc-avr): New variable.
* gnu/packages/bootstrap.scm (glibc-dynamic-linker): Add case for
  "avr".

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: Add hexchat.

* gnu/packages/messaging.scm (hexchat): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: libxkbcommon: Update to 0.5.0.

* gnu/packages/qt.scm (libxkbcommon): Update to 0.5.0.
    Add input libxcb and native input pkg-config.

gnu: xcb-util-renderutil: Update to 0.3.9.

* gnu/packages/xorg.scm (xcb-util-renderutil): Update to 0.3.9.

gnu: xcb-util-keysyms: Update to 0.4.0.

* gnu/packages/xorg.scm (xcb-util-keysyms): Update to 0.4.0.

gnu: xcb-util-image: Update to 0.4.0.

* gnu/packages/xorg.scm (xcb-util-image): Update to 0.4.0.

gnu: xcb-util: Update to 0.4.0.

* gnu/packages/xorg.scm (xcb-util): Update to 0.4.0.

gnu: libxcb: Update to 1.11.

* gnu/packages/xorg.scm (libxcb): Update to 1.11.

gnu: xcb-proto: Update to 1.11.

* gnu/packages/xorg.scm (xcb-proto): Update to 1.11.

gnu: dbus: Add 1.8.10 as a replacement.

* gnu/packages/glib.scm (dbus)[replacement]: New field.
  (dbus-1.8.10): New variable.

gnu: Add pflask.

* gnu/packages/linux.scm (pflask): New variable.

vm: Introduce 'file-system-mapping'.

* gnu/system/vm.scm (<file-system-mapping>): New record type.
  (%store-mapping): New variable.
  (host-9p-file-system): Rename to...
  (mapping->file-system): ... this.  Replace 'source' and 'target'
  parameters with 'mapping'.  Set 'flags' field.
  (virtualized-operating-system): Add 'mappings' parameter and  honor
  it.
  (system-qemu-image/shared-store-script): Add 'mappings' parameter.
  Pass it to 'virtualized-operating-system'.  Use it in argument to
  'common-qemu-options'.

vm: Formalize use of '-virtfs' options.

* gnu/system/vm.scm (file-system->mount-tag, host-9p-file-system): New
  procedures.
  (virtualized-operating-system): Use 'host-9p-file-system' for the
  store.
  (common-qemu-options): Add 'shared-fs' parameter.
  [virtfs-option]: New procedure.
  Use it.
  (system-qemu-image/shared-store-script): Adjust accordingly.

linux-boot: Don't catch exceptions thrown by 'mount-root-file-system'.

* gnu/build/linux-boot.scm (mount-root-file-system): Remove 'catch #t'
  around body.  This was unneeded and even inconvenient because this
  procedure is called from within 'call-with-error-handling' already.

services: xorg: Include ~/.guix-profile/bin to the session's $PATH.

Fixes <http://bugs.gnu.org/19119>.
Reported by David Thompson <dthompson2@worcester.edu>.

* gnu/services/xorg.scm (xinitrc): Augment $PATH to include
  ~/.guix-profile/bin.

file-systems: Always write the options field in /etc/mtab.

* gnu/build/file-systems.scm (mount-file-system): When OPTIONS is false,
  write "rw" to /etc/mtab.  This fixes a bug whereby 'remove-from-mtab'
  in (guix syscalls) would otherwise raise a 'match-error' because of
  the missing field.  This affected file systems mounted from the
  initrd, such as devtmpfs, which has options == #f.

gnu: icu4c: Update to 54.1.

* gnu/packages/icu4c.scm (icu4c): Update to 54.1.
* gnu/packages/patches/icu4c-test-date-format.patch: Remove unneeded patch.
* gnu-system.am (dist_patch_DATA): Unregister dropped patch.

gnu: gst-plugins-good: Enable more plugins

* gnu/packages/gstreamer.scm (gst-plugins-good): New inputs:
  cairo, gdk-pixbuf, flac, speex, libogg, libx11, zlib, libpng, libjpeg,
  libXext, libxv, pulseaudio.