* build-aux/check-available-binaries.scm (%supported-systems): New
  variable.
  (native): Map over these.

* srfi/srfi-37.scm.in: New file, taken from Guile 2.0.9.
* m4/guix.m4: New macro.
* configure.ac: Use it.  Define Automake conditional `INSTALL_SRFI_37'.
* Makefile.am (nobase_nodist_guilemodule_DATA)[INSTALL_SRFI_37]: Add
  srfi/srfi-37.scm.
  (GOBJECTS)[INSTALL_SRFI_37]: Add srfi/srfi-37.go.
  (srfi/srfi-37.scm)[INSTALL_SRFI_37]: New target.
  (EXTRA_DIST): Add srfi/srfi-37.scm.in.

* doc/guix.texi (Requirements): Require Guile 2.0.5+.
* README: Ditto.

* doc/guix.texi (Contributing): Refer to guix-devel@gnu.org.

* gnu/packages/version-control.scm (subversion): Use the http:// URL
  to work around <http://bugs.gnu.org/14884>.  Reported by Mark Weaver
  and Andreas Enge.

* build-aux/list-packages.scm (package->sxml)[status]: New procedure.
  Use it at the end of each description.
  (packages->sxml): Add link to hydra.gnu.org.

* gnu/packages/libphidget.scm (libphidget): Add `outputs' field.

* build-aux/hydra/gnu-system.scm (hydra-jobs): Use `cons', not `append'.

* build-aux/hydra/gnu-system.scm (hydra-jobs): Pick all the `system'
  keys in ARGUMENTS.
  [cross-jobs]: Turn into a procedure, with a `system' parameter.
  Build packages for all of SYSTEMS and %CROSS-TARGETS.

* build-aux/hydra/gnu-system.scm (package-job, package-cross-job):
  Append `.SYSTEM' to the job name.

* build-aux/hydra/gnu-system.scm (hydra-jobs): Really look up the
  `system' symbol in ARGUMENTS.

* gnu/packages/libapr.scm (libapr): Upgrade to 1.4.8.
* gnu/packages/libapr.scm (libaprutil): Upgrade to 1.5.2.

* guix/scripts/package.scm (guix-package)[process-actions](same-package?):
  New procedure.  Use it instead of `alist-delete' when filtering out
  duplicate packages from the profile.

* build-aux/check-available-binaries.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
  (distcheck-hook, assert-binaries-available): New target.

* gnu/packages/gtk.scm (pango): Propagate input cairo.
* gnu/packages/gtk.scm (gtk+): Propagate inputs atk, gdk-pixbuf and pango;
    drop input cairo, propagated through pango.

* gnu/packages/gtk.scm (pango): Propagate input harfbuzz.
* gnu/packages/gtk.scm (gtk+): New variable.

* gnu/packages/make-bootstrap.scm (%static-inputs)[gawk]: Add #:tests? #f.

* guix/web.scm: Rename to...
* guix/http-client.scm: ... this.
* guix/gnu-maintenance.scm, guix/scripts/substitute-binary.scm,
  Makefile.am, po/POTFILES.in: Update accordingly.

This fixes a bug whereby a command like

  guix package -e '(@@ (gnu packages base) gnu-make-boot0)'

would only succeed when the outputs of that package are available, and
otherwise fail with "/nix/store/... is not valid".

* guix/scripts/package.scm (guix-package)[process-action](package->tuple):
  Leave P as is in the result.  Move `package->tuple' call from INSTALL*
  to INSTALL.

* guix/ui.scm (initialize-guix): Call `sigaction'.
  (call-with-error-handling): Wrap `thunk' in a (catch 'system-error ...).

* guix/gnu-maintenance.scm (latest-release): Add `ftp-close' and
  `ftp-open' keyword parameters.
* guix/scripts/package.scm (ftp-open*): New variable.
  (check-package-freshness): Call `latest-release' with `ftp-open*' and
  a no-op procedure.

* guix/gnu-maintenance.scm (latest-release): Close CONN before
  returning.

* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/patches/plotutils-libpng-jmpbuf.patch: New file.
* gnu/packages/plotutils.scm (plotutils): Add
  `plotutils-libpng-jmpbuf.patch' as an input, and apply it.

* gnu/packages/freeipmi.scm (freeipmi): Upgrade to 1.2.8.

* gnu/packages/libidn.scm (libidn): Upgrade to 1.28.

* gnu/packages/gnupg.scm (libgpg-error): Upgrade to 1.12.
  (libassuan): Upgrade to 2.1.1.

* guix/scripts/substitute-binary.scm (%regexp-exec-mutex, string->uri):
  Remove.
  (regexp-exec): Replace this global binding by a thread-safety wrapper.
  (fields->alist): Remove `with-mutex', and directly alias `recutils->alist'.

* gnu/packages/help2man.scm (help2man): Upgrade to 1.43.3.

* gnu/packages/cdrom.scm (xorriso): Upgrade to 1.3.0.

* guix/scripts/substitute-binary.scm (%fetch-timeout): Set to 5 seconds.

* gnu/packages/autotools.scm (automake): Upgrade to 1.14.

* guix/scripts/refresh.scm (guix-refresh)[keep-newest]: New procedure.
  Use it to keep only once copy of each package.

* build-aux/list-packages.scm (lookup-gnu-package): New procedure.
  (package->sxml): Add the package logo, when available, next to the
  description.