* guix/scripts/build.scm (%options, options->derivations): Add --sources
  option.
* doc/guix.texi (Invoking guix build): Document --sources option.
* tests/guix-build.sh: Add tests.

* guix/tests.scm (dummy-origin): New syntax.
* guix/packages.scm (package-direct-sources)
  (package-transitive-sources): New procedures.
* tests/packages.scm ("package-direct-sources, no source")
  ("package-direct-sources, #f source")
  ("package-direct-sources, not input source", "package-direct-sources")
  ("package-transitive-sources"): Test them.

* gnu/system/install.scm (installation-os)[packages]: Add
  BASH-COMPLETION.

Discussed in <http://bugs.gnu.org/20255>.

* guix/packages.scm (sexp->search-path-specification): New variable.
* guix/profiles.scm (<manifest-entry>)[search-paths]: New field.
  (package->manifest-entry): Initialize it.
  (manifest->gexp): Match it.  Wrap #$deps in (propagated-inputs ...).
  Emit (search-paths ...).  Increment version.
  (find-package): New procedure.
  (sexp->manifest)[infer-search-paths]: New procedure.
  Use it to initialize the 'search-paths' field for versions 0 and 1.
  Add case for version 2.
* guix/scripts/package.scm (search-path-environment-variables)[manifest-entry->package]:
  Remove.
  Use 'manifest-entry-search-paths' instead of 'manifest-entry->package'
  plus 'package-native-search-paths'.
* tests/profiles.scm ("profile-manifest, search-paths"): New test.

* build-aux/hydra/guix.scm (tarball-package): Remove 'nix-checkout'
  parameter.  Remove 'arguments', 'native-inputs', and 'location'
  fields.  Adjust caller accordingly.
  (hydra-jobs): Remove 'nix-checkout'.

* guix/build-system/gnu.scm (dist-package)[native-inputs]: Preserve P's
  native-inputs.

* guix/build-system/gnu.scm (dist-package): Change libtool:bin input to
  just libtool.

* gnu/packages/gcc.scm (gcj)[arguments]: Add a build phase to remove a broken
  symlink and generic stump binaries.

* gnu/packages/gl.scm (mesa): Update version to 10.5.4.  Add libxvmc to
  inputs.  Remove python, gettext, flex, and bison from native-inputs.  Remove
  hack that was necessary to prevent rebuilding parts of the build system.

There is a circular dependency between Mesa and libVA, so we use a
libva-no-mesa package that builds libVA without GLX and EGL support, and use
that for building Mesa.

* gnu/packages/gl.scm (libva-for-mesa): New variable.
(mesa): Add as input.

* gnu/packages/linux.scm (linux-libre): Update to 4.0.1.

* gnu/packages/ebook.scm: Do not import (gnu packages ebook).

* gnu/services/base.scm (console-keymap-service): New procedure.
* doc/guix.texi (Base Services): Document it.

Co-authored-by: 宋文武 <iyzsong@gmail.com>

* etc/completion/bash/guix (_guix_complete_option): Change grep regexp
  to match options that don't have a short option name.

* gnu/packages/polkit.scm (polkit-qt)[arguments]: Add
  #:configure-flags.

* build-aux/check-available-binaries.scm: Use %HYDRA-SUPPORTED-SYSTEMS
  instead of %SUPPORTED-SYSTEMS.

This has been redundant since 21e583de.

* gnu/packages/databases.scm (mariadb)[arguments]: Remove LDFLAGS
  definition.

* build-aux/list-packages.scm (package->sxml)[status]:
  Intersect (package-transitive-supported-systems package) with
  %HYDRA-SUPPORTED-SYSTEMS.

* build-aux/hydra/gnu-system.scm (%hydra-supported-systems): Remove.
* guix/packages.scm (%hydra-supported-systems): New variable.

* gnu/packages/gtk.scm (ganv)[arguments]: Add 'set-ldflags' phase.

* guix/serialization.scm (read-maybe-utf8-string): Use
  'set-port-encoding!' and 'set-port-conversion-strategy!' instead of
  setting '%default-port-encoding' and
  '%default-port-conversion-strategy'.  This accounts for Guile commit
  d574d96, which changes bytevector input ports to use ISO-8859-1.

In practice we would not leak much since we reconnect after ~100
requests (with nginx running on hydra.gnu.org.)

* guix/scripts/substitute.scm (http-multiple-get): Call 'close-port'
  before 'connect'.

See <https://bugreports.qt.io/browse/QTBUG-45205>.

* gnu/packages/patches/qt5-conflicting-typedefs.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/qt.scm (qt): Add the patch.

Fixes <http://bugs.gnu.org/20402>.
Reported by Joshua Randall <jcrandall@alum.mit.edu>.

* guix/download.scm (url-fetch): Pass #:leaked-env-vars to
  'gexp->derivation'.

Suggested by Joshua Randall <jcrandall@alum.mit.edu>
in <http://bugs.gnu.org/20402>.

* guix/derivations.scm (derivation): Add #:leaked-env-vars parameter.
  [user+system-env-vars]: Honor it.
* guix/gexp.scm (gexp->derivation): Add #:leaked-env-vars and pass it to
  'raw-derivation'.
* doc/guix.texi (Derivations, G-Expressions): Adjust accordingly.

Partly fixes <http://bugs.gnu.org/20402>.
Reported by Joshua Randall <jcrandall@alum.mit.edu>.

* guix/build/download.scm (open-connection-for-uri): Rewrite to be a
  small wrapper around 'open-socket-for-uri'.  This procedure was
  initially introduced in d14ecda9 to work around the lack of NSS modules
  during bootstrap but that has become unnecessary since 06213498, which
  introduced a bootstrap Guile that uses static NSS modules (from commit
  d3b59727.)
  On Guile >= 2.0.10, this allows the 'http_proxy' environment variable
  to be used.

* gnu/packages/libreoffice.scm (orcus): New variable.

Fixes <http://bugs.gnu.org/20040>.

* gnu/packages/audio.scm (lilv): Add a pre-configure phase setting $LDFLAGS to
  set the rpath to $out/lib.

Fixes <http://bugs.gnu.org/20044>.

* gnu/packages/rdf.scm (sord): Add a pre-configure phase setting $LDFLAGS to
  set the rpath to $out/lib.

Fixes <http://bugs.gnu.org/20051>.

* gnu/packages/rdf.scm (serd): Add a pre-configure phase setting $LDFLAGS to
  set the rpath to $out/lib.

Fixes <http://bugs.gnu.org/20049>.

* gnu/packages/wxwidgets.scm (wxwidgets): Add a make flag to set rpath to
  $out/lib via LDFLAGS.

* gnu/packages/gcc.scm (gcc-4.8): Add link to bug report in comment.

* gnu/packages/gcc.scm (gcc-4.9): Inherit from GCC-4.8.
  [source]: Add 'gcc-libvtv-runpath.patch'.
  (gcc-5.1): Inherit from GCC-4.9.
  [source]: Use patches from GCC-4.9.
* gnu/packages/patches/gcc-libvtv-runpath.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

* gnu/packages/video.scm (libva): Patch the reference to libva-x11.so (passed
  to dlopen()) to use an absolute path.  Add --with-drivers-path= to
  #:configure-flags with a value pointing to mesa's $prefix/lib/dri.

Reported by 宋文武 <iyzsong@gmail.com>.

* gnu/build/install.scm (directives): Add /var/lock.

* gnu/packages/audio.scm (jack2)[arguments]: Add #:phases.

* gnu/packages/gstreamer.scm (gstreamer-0.10, gst-plugins-base-0.10):
  Remove variables.
* gnu/packages/patches/gstreamer-0.10-bison3.patch,
  gnu/packages/patches/gstreamer-0.10-silly-test.patch: Remove files.
* gnu-system.am (dist_patch_DATA): Remove them.