* gnu/packages/mpi.scm (openmpi)[origin]: Fix typo.

* gnu/packages/algebra.scm (fftw)[inputs,arguments]: Add OpenMPI.

* gnu/packages/algebra.scm (fftw): Upgrade to 3.3.4.

* gnu/services/base.scm (root-file-system-service,
  user-processes-service): New procedures.
  (mingetty-service, nscd-service, syslog-service, guix-service): Add
  requirement on 'user-processes'.
  (%base-services): Add (user-processes-service)
  and (root-file-system-service).
* gnu/services/xorg.scm (slim-service): Add requirement on
  'user-processes'.

* guix/build/linux-initrd.scm (switch-root): Simplify /dev/console
  code.  This fixes a bug where we would leak the IN and OUT file
  descriptors.

* doc/guix.texi (G-Expressions): Mention Oleg's work on "staging" in
  footnote.

* guix/build/git.scm (git-fetch): Add 'setenv' call.

* gnu/packages/mpi.scm (openmpi)[synopsis,description]: Remove mention
  of "open source".

* gnu/packages/maths.scm (petsc-openmpi): New variable.
  (petsc-complex-openmpi): New variable.

* gnu/packages/maths.scm (petsc)[arguments]: Scrub some
  config-generated header files before build.  Only remove files if
  they exist.

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

* .gitmodules: Use https, not http.  Reported by
  Pjotr Prins <pjotr.public12@thebird.nl>.

* guix/build/linux-initrd.scm (mount-root-file-system): Populate
  /root/etc/mtab.
  (mount-file-system): Update ROOT/etc/mtab.

* guix/build/gnome.scm: Remove.
* Makefile.am (MODULES): Update accordingly.

* gnu/packages/glib.scm (glib): Add 'native-search-paths' and
  'search-paths' fields.
* gnu/packages/gnome.scm (libpeas): Remove 'arguments' field.
  (librsvg)[arguments]: Remove #:modules and #:imported-modules.
  Remove settings of INTROSPECTION_SCANNER_ARGS and
  INTROSPECTION_COMPILER_ARGS in makefiles.
* gnu/packages/gtk.scm (gtk+): Likewise.

* gnu/packages/gtk.scm (atk, pango, gdk-pixbuf, gtk+): Move
  gobject-introspection to 'native-inputs' since it's only used at build
  time.
* gnu/packages/gnome.scm (libpeas): Move pkg-config,
  gobject-introspection, and intltool to 'native-inputs'.

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

* guix/build/linux-initrd.scm (switch-root): Delete file from the old
  root.  Chdir to / after 'chroot' call.  Re-open file descriptors 0, 1,
  and 2.
  (boot-system): Move 'loading' message after the 'switch-root' call.
* gnu/system.scm (operating-system-boot-script): Add loop that closes
  file descriptor before calling 'execl'.

* gnu/packages/gnupg.scm (pius): Use Python 2.

* gnu/packages/make-bootstrap.scm: Export '%guile-static-stripped'.  The
  problem was hidden because of <http://bugs.gnu.org/17418>.

* gnu/packages/linux.scm (e2fsprogs)[native-inputs]: Add TEXINFO.

* gnu/packages/linux.scm (e2fsprogs/static): Remove.
  (e2fsck/static): Use (static-package e2fsprogs) instead.

* gnu/packages/gdb.scm (gdb): Upgrade to 7.7.1.

* gnu/packages/gdb.scm (gdb)[inputs]: Add LIBXML2.

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

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

* gnu/packages/python.scm (python2-pybugz)[source]: Add 'patches'
  field.
* gnu/packages/patches/pybugz-encode-error.patch,
  gnu/packages/patches/pybugz-stty.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.

* guix/gnu-maintenance.scm (gnu-package?): Only call 'mirror-type' when
  URL is a string.

* guix/build/linux-initrd.scm (move-essential-file-systems,
  switch-root): New procedures.
  (MS_MOVE): New variable.
  (boot-system): Remove 'mount-essential-file-systems' call for ROOT.
  Use 'switch-root' instead of chdir + chroot.

* gnu/services/networking.scm (static-networking-service): Use
  $inetutils/bin/ifconfig, not $inetutils/sbin/ifconfig.

* gnu/packages/maths.scm: Use (guix utils), which was needed since
  b9100e2f.

* gnu/system.scm (operating-system-derivation)[boot-file-systems]: Keep "/".
* gnu/system/linux-initrd.scm (file-system->spec): Keep the 'check?'
  flag.
  (qemu-initrd)[helper-packages]: New variable.  Pass it as #:to-copy.
  <gexp>: Add 'set-path-environment-variable' call.  Remove #:unionfs
  argument for 'boot-system'.
* gnu/system/vm.scm (%linux-vm-file-systems): Add 'check?' field/
  (virtualized-operating-system): Likewise for the "9p" file system.
* guix/build/linux-initrd.scm (mount-root-file-system): Change #:unionfs
  default.  Call 'check-file-system' before mounting ROOT, when
  VOLATILE-ROOT? is false.
  (check-file-system): New procedure.
  (mount-file-system): Honor 'check?' element in list; add
  'check-file-system' call.
  (boot-system): Remove #:root-fs-type and #:unionfs parameters.
  [root-mount-point?, root-fs-type]: New variables.
  Call 'mount-file-system' on all MOUNTS but "/".

* guix/build/activation.scm (activate-setuid-programs): When
  %SETUID-DIRECTORY exists, pass the right file names to 'delete-file'.

* gnu/packages/linux.scm (e2fsprogs/static, e2fsck/static): New
  variables.

Fixes a regression introduced in 83bcd0b8.

* gnu/system/vm.scm (system-qemu-image): Override the 'file-systems'
  field of OS.  Add #:file-system-type parameter and honor it.

* gnu/system/vm.scm (qemu-image): Add #:file-system-type parameter.
  Pass it to 'initialize-hard-disk'.
* guix/build/linux-initrd.scm (mount-root-file-system): Always honor
  TYPE.
  (boot-system): Change #:root-fs-type to default to "ext4".  Update
  docstring.
* guix/build/vm.scm (initialize-hard-disk): Remove #:mkfs parameter; add
  #:file-system-type.  Adjust 'mkfs' invocation and 'mount' call to
  honor #:file-system-type.

* doc/guix.texi (G-Expressions): Show coreutils version number in store
  file name.  Add xref to "Derivations", in documentation of
  'gexp->derivation'.  Fix typo.

* gnu/packages/version-control.scm (diffstat): New variable.

* guix/ftp-client.scm (%ftp-login): Add #\return before #\newline.
  Fixes access to some FTP servers, such as
  ftp://invisible-island.net ("ProFTPD 1.3.4a Server").

* gnu/system.scm (<operating-system>)[initrd]: Default to
  'qemu-initrd'.
  (<file-system>): New record type.
  (operating-system-root-file-system): New procedure.
  (operating-system-derivation): Take the device name for GRUB from
  'operating-system-root-file-system'.  Pass the
  'operating-system-initrd' procedure the list of boot file systems.
* gnu/system/linux-initrd.scm (file-system->spec): New procedure.
  (qemu-initrd): Add 'file-systems' parameter, and remove #:mounts
  parameter.
  [file-system-type-predicate]: New procedure.
  [linux-modules]: Use it.
  Adjust #:mounts argument in 'boot-system' call.
  (gnu-system-initrd): Remove.
* gnu/system/vm.scm (%linux-vm-file-systems): New variable.
  (expression->derivation-in-linux-vm): Adjust call to 'qemu-initrd'.
  (virtualized-operating-system): New procedure.
  (system-qemu-image/shared-store-script)[initrd]: Remove.  Use
  'virtualized-operating-system'.  Get the 'initrd' file from OS-DRV.
* guix/build/linux-initrd.scm (mount-qemu-smb-share, mount-qemu-9p):
  Remove.
  (MS_RDONLY, MS_BIND): New global variables.
  (bind-mount): Remove local 'MS_BIND' definition.
  (mount-root-file-system): New procedure, with code formerly in
  'boot-system'.
  (mount-file-system): New procedure.
  (boot-system): Add #:root-fs-type parameter.  Remove 'MS_RDONLY' local
  variable.  Use 'mount-root-file-system' and 'mount-file-system'.
* doc/guix.texi (Using the Configuration System): Add 'file-system'
  declaration.