build: Add --with-libgcrypt-libdir=DIR to support Debian's multi-arch layout.

* configure.ac: Remove 'LIBGCRYPT_PREFIX' and use 'LIBGCRYPT_LIBDIR'
  instead.  Add --with-libgcrypt-libdir=DIR option.
* Makefile.am (AM_DISTCHECK_CONFIGURE_FLAGS): Pass
  '--with-libgcrypt-libdir'.
* config-daemon.ac: Honor $LIBGCRYPT_LIBDIR when computing
  LIBGCRYPT_LIBS.

gnu: Add rasqal.

* gnu/packages/rdf.scm (rasqal): New variable.

store: Add #:store parameter to 'register-path'.

* guix/store.scm (register-path): Add #:store and honor it.

linux-initrd: Factorize kernel command-line option parsing.

* guix/build/linux-initrd.scm (find-long-option): New procedure.
  (boot-system): Use it instead of the local 'option'.

hydra: Add dummy root file system declaration.

* build-aux/hydra/demo-os.scm (file-systems): Add "/" file system.

guix system: Add 'build' action.

* guix/scripts/system.scm (show-help): Document 'build' action.
  (guix-system): Honor 'build' action.
* doc/guix.texi (Invoking guix system): Add 'build' action.

gnu: Add libuv.

* gnu/packages/libevent.scm (libuv): New variable.

authenticate: Add compatibility hack for Guile 2.0.5.

* guix/scripts/authenticate.scm (%default-port-conversion-strategy): New
  variable.  Reported by Andreas Enge <andreas@enge.fr>.

list-runtime-roots: Don't display a backtrace on 2.0.5 when lsof is lacking.

* nix/scripts/list-runtime-roots.in (lsof-roots): Fix typo in 'catch'
  tag.  Add 'parent' variable.  Wrap 'open-pipe*' call in 'catch'.
  Reported by Andreas Enge <andreas@enge.fr>.

system: Add (guix build install) module.

* guix/build/vm.scm (install-grub, evaluate-populate-directive,
  reset-timestamps, register-closure): Move to...
* guix/build/install.scm: ... here.  New file.
* Makefile.am (MODULES): Add it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Add (guix
  build install) to #:modules.

vm: Support initialization of the store DB when the store is shared.

* gnu/system/vm.scm (qemu-image): Rename #:inputs-to-copy to #:inputs,
  and #:initialize-store? to #:register-closures?.  Add #:copy-inputs?.
  Adjust build gexp accordingly.
  (system-qemu-image): Remove #:initialize-store? argument and add
  #:copy-inputs?.
  (system-qemu-image/shared-store): Add #:inputs, #:register-closures?,
  and #:copy-inputs? arguments.
* guix/build/vm.scm (register-closure): New procedure.
  (MS_BIND): New variable.
  (initialize-hard-disk): Rename #:initialize-store? to
  #:register-closures?, #:closures-to-copy to #:closures, and add
  #:copy-closures?.
  Add 'target-directory' and 'target-store' variables.
  Call 'populate-store' only when COPY-CLOSURES?.
  Bind-mount the store to TARGET-STORE when REGISTER-CLOSURES? and not
  COPY-CLOSURES?.  Add call to 'register-closure'.

build: Remove fusectl from the default file systems in the demo OS.

* build-aux/hydra/demo-os.scm (file-systems): Comment out
  %FUSE-CONTROL-FILE-SYSTEM, since fuse.ko is missing by default in the
  freestanding VM image.

system: Provide declarations for the 'fusectl' and 'binfmt_misc' file systems.

* gnu/system.scm (%fuse-control-file-system,
  %binary-format-file-system): New variables.
* build-aux/hydra/demo-os.scm (file-systems): New field.

vm: Keep acceptable file systems from the original OS.

* gnu/system/vm.scm (virtualized-operating-system): Instead of
  completely overriding 'file-systems', use 'remove' to filter out some
  of those declared in OS.
  (system-qemu-image): Likewise.

gnu: xterm: Upgrade to 304.

* gnu/packages/xorg.scm (xterm): Upgrade to 304.  Switch to a
  version-specific URL.

activation: Silence warning from 'useradd'.

* guix/build/activation.scm (add-user): Don't pass '--create-home' when
  HOME already exists.

linux-initrd: Make /dev/ttyS0, for debugging.

* guix/build/linux-initrd.scm (make-essential-device-nodes): Make
  /dev/ttyS0.

system: When unionfs-fuse is used for /, don't kill it when halting.

* guix/build/linux-initrd.scm (pidof): New procedure.
  (mount-root-file-system)[mark-as-not-killable]: New procedure.
  Use it for unionfs when VOLATILE-ROOT?.
* gnu/services/base.scm (%do-not-kill-file): New variable.
  (user-processes-service)[stop]: Honor it.

syscalls: Add 'processes' to list all the live processes.

* guix/build/syscalls.scm (kernel?, processes): New procedures.

gnu: libsm: Propagate input libice.

* gnu/packages/xorg.scm (libsm): Propagate input libice.