gnu: gcc: Update to 4.9.1.

* gnu/packages/gcc.scm (gcc-4.9): Update to 4.9.1.

gnu: Add libftdi.

* gnu/packages/libftdi.scm: New file
* gnu-system.am (GNU_SYSTEM_MODULES): Add libftdi.scm

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

gnu: Adjust more packages to GLib "bin" split.

* gnu/packages/gimp.scm (gegl): Add glib:bin to 'native-inputs'.
* gnu/packages/mail.scm (mu): Ditto.

gnu: parallel: Upgrade to 20140722.

* gnu/packages/parallel.scm (parallel): Upgrade to 20140722.

gnu: xorriso: Upgrade to 3.1.8.

* gnu/packages/cdrom.scm (xorriso): Upgrade to 3.1.8.

gnu: nano: Upgrade to 2.3.6.

* gnu/packages/nano.scm (nano): Upgrade to 2.3.6.

gnu: htop: Update source URI.

* gnu/packages/admin.scm (htop): Update source URI.

gnu: module-init-tools: Fix $LINUX_MODULE_DIRECTORY handling in 'depmod'.

* gnu/packages/patches/module-init-tools-moduledir.patch: Adjust the
  'depmod' part to handle $LINUX_MODULE_DIRECTORY without a trailing
  slash.

gnu: kmod: Install symlinks for 'insmod', 'modprobe', etc.

* gnu/packages/linux.scm (kmod)[arguments]: Add 'install-modprobe&co'
  phase.

gnu: module-init-tools: Handle $LINUX_MODULE_DIRECTORY without trailing slash.

Fixes <http://bugs.gnu.org/18068>.

* gnu/packages/patches/module-init-tools-moduledir.patch: Adjust to deal
  with the lack of a trailing slash.

gnu: dvdisaster: Upgrade to 0.72.6.

* gnu/packages/cdrom.scm (dvdisaster): Upgrade to 0.72.6.

install: Add a service to back the store with the target disk.

Fixes <http://bugs.gnu.org/18061>.
Reported by Adam Pribyl <pribyl@lowlevel.cz>.

* gnu/services/dmd.scm (dmd-configuration-file)[config]: Import (guix
  build utils).
* gnu/system/install.scm (make-cow-store, cow-store-service): New
  procedures.
  (installation-services): Use it.
  (%backing-directory): New variable.
* doc/guix.texi (System Installation): Add the 'deco start cow-store
  /mnt' phase.

gnu: pari-gp: Upgrade to 2.7.1.

* gnu/packages/algebra.scm (pari-gp): Upgrade to 2.7.1.

system: Add missing exports to (gnu system file-systems).

* gnu/system/file-systems.scm (%pseudo-terminal-file-system)
  (%shared-memory-file-system): Add to export list.

system: Add /dev/shm.

* gnu/system/file-systems.scm (%shared-memory-file-system): New
  variable.
  (%base-file-systems): Add it.
* doc/guix.texi (File Systems): Document it.

system: Recognize more file system flags.

* guix/build/linux-initrd.scm (MS_NOSUID, MS_NODEV, MS_NOEXEC): New
  variables.
  (mount-flags->bit-mask): New procedure.
  (mount-file-system)[flags->bit-mask]: Remove.
  Use 'mount-flags->bit-mask' instead.
  In /etc/mtab, use the empty string when OPTIONS is false.
* gnu/services/base.scm (file-system-service): Add #:flags parameter and
  honor it.
* gnu/system.scm (other-file-system-services): Pass FLAGS to
  'file-system-service'.

system: Add 'file-system' decl. for /dev/pts, and use the right options.

Fixes <http://bugs.gnu.org/18081>.

* gnu/system/file-systems.scm (%devtmpfs-file-system): Add
  'needed-for-boot?' field.
  (%tty-gid, %pseudo-terminal-file-system): New variables.
  (%base-file-systems): Add %PSEUDO-TERMINAL-FILE-SYSTEM.
* gnu/services/base.scm (udev-service): Remove dependency on
  'file-system-/dev'.
* gnu/system/shadow.scm (%base-groups): Add 'id' field for group 'tty'.
* guix/build/linux-initrd.scm (boot-system): Remove 'mount' call for
  /dev/pts.
* doc/guix.texi (File Systems): Add %pseudo-terminal-file-system.

system: Add 'create-mount-point?' file system option.

* gnu/system/file-systems.scm (<file-system>)[create-mount-point?]: New
  field.
* gnu/services/base.scm (file-system-service): Add #:create-mount-point?
  parameter and honor it.
* gnu/system.scm (other-file-system-services): Update
  'file-system-service' call accordingly.
* doc/guix.texi (File Systems): Document it.

system: Add '%devtmpfs-file-system' for udev, and '%base-file-systems'.

Suggested by Adam Pribyl <pribyl@lowlevel.cz>.

* gnu/services/base.scm (udev-service)[requirement]: Add
  'file-system-/dev'.
* gnu/system/file-systems.scm (%devtmpfs-file-system,
  %base-file-systems): New variables.
* gnu/system/install.scm (installation-services)[file-systems]: Use
  %base-file-systems.
* build-aux/hydra/demo-os.scm (file-systems): Likewise.
* doc/guix.texi (System Installation): Show %BASE-FILE-SYSTEMS in the
  example.
  (Using the Configuration System): Likewise.
  (File Systems): Document %base-file-systems, %devtmpfs-file-system,
  %binary-format-file-system, and %fuse-control-file-system.

services: Allow 'check-file-system' to work for non-boot-time file systems.

* gnu/services/base.scm (file-system-service)[start]: Set $PATH so that
  fsck.* can be found.  Reported by "DusXMT".