gnu: readline: Fix cross-compilation.

* gnu/packages/readline.scm (readline)[arguments]: Add
  "bash_cv_wcwidth_broken=no" to #:configure-flags
  when (%current-target-system) is true.

gnu: bzip2: Install man pages to share/man/man1, not share/man1.

* gnu/packages/compression.scm (bzip2)[fix-man-dir]: Rename "man"
  to "share/man", not "share".

gnu: ncurses: Install man pages in share/man/man*, not man/man*.

* gnu/packages/ncurses.scm (ncurses): Add --mandir configure flag.

gnu: guile: Upgrade to 2.0.10.

* gnu/packages/guile.scm (guile-2.0): Upgrade to 2.0.10.

gnu: Make libgc 7.4 the default.

* gnu/packages/bdw-gc.scm (libgc): Rename to...
  (libgc-7.2): ... this.
  (libgc-7.4): Rename to...
  (libgc): ... this.
* gnu/packages/guile.scm (guile-2.0): Switch to LIBGC.
  (guile-2.0/fixed): Alias GUILE-2.0.

Merge branch 'master' into core-updates

gnu: python: Change URL to https.

* gnu/packages/python.scm (python-2, python)[source]: Change URL to
  https.  This makes sure GnuTLS is available in the derivation that
  downloads the source, which is required since http URLs get redirected
  to https anyway.  Reported by Manolis Ragkousis <manolis837@gmail.com>.

gnu: pulseaudio: Upgrade to 5.0.

* gnu/packages/pulseaudio.scm (pulseaudio): Upgrade to 5.0.
  Remove patches.
* gnu/packages/patches/pulseaudio-test-timeouts.patch,
  gnu/packages/patches/pulseaudio-volume-test.patch: Remove.
* gnu-system.am (dist_patch_DATA): Adjust accordingly.

gnu: fuse: Refer to the right 'mount' and 'umount' commands.

* gnu/packages/linux.scm (fuse)[inputs]: Change to...
  [native-inputs]: ... this.
  [arguments]: Add #:phases argument.

store: Add 'hash-part->path'.

* guix/store.scm (hash-part->path): New procedure.
* tests/store.scm ("hash-part->path"): New test.

offload: Fix 'choose-build-machine' for several machines.

* guix/scripts/offload.scm (choose-build-machine)[undecorate]: Turn into
  a two-argument procedure.

offload: Convert the port number to a string when invoking lsh.

* guix/scripts/offload.scm (remote-pipe, send-files): Pass the result of
  'build-machine-port' to 'number->string'.

offload: Allow build machines to specify a port number.

* guix/scripts/offload.scm (<build-machine>): Add 'port' field.
  (remote-pipe, send-files): Use lsh's '-p' option when invoking it.

guix build: Support '--with-source' along with '-e'.

* guix/scripts/build.scm (derivation-from-expression): Remove.
  (options->derivations): Handle pairs of the form
  "('argument . (? derivation?))".
  (options/resolve-packages): Add 'store' parameter; update caller.  Add
  'system' variable.  Add case for 'expression pairs.
* guix/scripts/archive.scm (derivation-from-expression): New procedure.

gnu: guile-xcb: Upgrade to 1.3.

* gnu/packages/guile-wm.scm (guile-xcb): Upgrade to 1.3.
  [arguments] Pass --with-guile-site-dir= instead of --datadir=,
  and pass --with-guile-site-ccache-dir=.  Remove #:phases.

gnu: linux-libre: Build the FUSE module.

* gnu/packages/linux.scm (linux-libre): Set CONFIG_FUSE_FS=m.

gnu: unionfs-fuse: Add statically-linked variant.

* gnu/packages/linux.scm (unionfs-fuse/static): New variable.

guix build: Add '--with-source'.

* guix/scripts/build.scm (package-with-source): New procedure.
  (show-help): Add '--with-source'.
  (%options): Likewise.
  (options->derivations): Call 'options/with-source' and
  'options/resolve-packages'.
  (options/resolve-packages, options/with-source): New procedures.
* doc/guix.texi (Invoking guix build): Document '--with-source'.

download: 'download-to-store' accepts plain file names.

* guix/download.scm (download-to-store): When URI is #f, assume that URL
  is a file name, and handle it.

gnu: libgc: Upgrade to 7.2e.

* gnu/packages/bdw-gc.scm (libgc): Upgrade to 7.2e.