* gnu/packages/video.scm (ffmpeg)[arguments]: Use 'modify-phases'
  instead of 'alist-cons-after' et al.

* build-aux/hydra/gnu-system.scm (qemu-jobs) <usb-image>: Increase from
  800 MiB to 850 MiB.

* gnu/packages/gnuzilla.scm (icecat)[arguments]: Pass
  #:validate-runpath? #f.

* guix/build/haskell-build-system.scm (%standard-phases): Add missing
  quotes, as needed since commit f8503e2b.

* Makefile.am (MODULES): Add guix/build/haskell-build-system.scm.

* gnu/packages/qt.scm (qt-4)[outputs]: New field.
  (qt-4)[arguments]: Pass '-docdir', '-demosdir', and '-examplesdir'.

Fixes the build failure at <http://hydra.gnu.org/build/379884/log/raw>:

  g++ -licui18n -Wl,-O1 [...] -o ../../../../bin/assistant [...]
  ld: warning: libQtCLucene.so.4, needed by /tmp/nix-build-qt-4.8.6.drv-0/qt-everywhere-opensource-src-4.8.6/lib/libQtHelp.so, not found (try using -rpath or -rpath-link)
  /tmp/nix-build-qt-4.8.6.drv-0/qt-everywhere-opensource-src-4.8.6/lib/libQtHelp.so: undefined reference to `QCLucenePhraseQuery::getTerms() const'
  [...]

* gnu/packages/patches/qt4-ldflags.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/qt.scm (qt-4)[source]: Use it.
  [arguments]: Remove 'setenv' call in 'configure' phase.

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

* gnu/packages/wine.scm (wine): Update to 1.7.40.

Fixes a regression whereby haskell-build-system was using an incomplete
module list.

* guix/build-system/haskell.scm (%haskell-build-system-modules): New
  variable.
  (haskell-build): Use it as the default value of #:imported-modules.

* guix/packages.scm (patch-and-repack)[build]: Change most #$ to #+.
* guix/cvs-download.scm (cvs-fetch)[build]: Likewise.
* guix/download.scm (url-fetch)[builder]: Likewise.
* guix/git-download.scm (git-fetch)[build]: Likewise.
* guix/svn-download.scm (svn-fetch)[build]: Likewise.

* gnu/packages/fltk.scm (fltk)[arguments]: Add
  DSOFLAGS=-Wl,-rpath=$libdir to #:configure-flags.

* gnu/packages/fltk.scm (fltk): Update to 1.3.33

* gnu/packages/textutils.scm (recode): Rename phase 'fix-setup-py to 'pre-check.
  Set LD_LIBRARY_PATH to "$(pwd)/src/.libs" in pre-check phase.

* gnu/packages/gnome.scm (gnome-settings-daemon): New variable.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

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

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/patches/qt5-runpath.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/qt.scm (qt)[source]: Use it.

* gnu/packages/upnp.scm (miniupnpc)[arguments]: Pass
  "LDFLAGS=-Wl,-rpath=...".

* gnu/packages/search.scm (libtocc)[arguments] <check>: Pass
  -Wl,-rpath=../src/.libs for the tests.

* gnu/packages/gnunet.scm (libmicrohttpd): Update to 0.9.40.

* gnu/packages/haskell.scm (ghc)[arguments]: Add #:validate-runpath?.
* gnu/packages/julia.scm (julia)[arguments]: Likewise.
* gnu/packages/java.scm (icedtea6)[arguments]: Likewise.

* gnu/packages/glib.scm (glib)[arguments]<#:configure-flags>:
  Pass "--with-html-dir=$doc/share/gtk-doc/html".

* gnu/packages/openldap.scm (openldap): Update to 2.4.40.

Fixes a regression introduced in 08c04509.

* gnu/packages/python.scm (python)[native-search-paths]: Use
  'version-major+minor' to compute PYTHONPATH.

This should have been done in 1ca8ff28.

* gnu/packages/gstreamer.scm (gst-libav): Add missing quotes in phase names
  passed to 'modify-phases'.

* gnu/packages/gl.scm (libepoxy)[arguments]: When building for arm,
  patch test/dlwrap.c to fix the tests.

* gnu/packages/gnutls.scm (p11-kit): Update to 0.23.1.

* gnu/packages/linux.scm (net-tools): Remove the HAVE_HWSTRIP and HAVE_HWTR
  options from the configuration.

* gnu-system.am (GNU_SYSTEM_MODULES): Add gnu/services/upower.scm.
* gnu/services/upower.scm: New file, defining a upower service.
* doc/guix.texi (Various Services): Mention it.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/gnome.scm (upower): New variable.
* gnu/packages/patches/upower-builddir.patch: New patch.
* gnu-system.am (dist_patch_DATA): Add it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* guix/scripts/lint.scm (check-derivation): New procedure.
  (%checkers): Add 'derivation' checker.
* tests/lint.scm ("derivation: invalid arguments"): New test.

* gnu/packages/patches/gnutls-fix-duplicate-manpages.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/gnutls.scm (gnutls)[source]: Update to 3.4.0.  Add patch.
  [arguments]: Pass --without-p11-kit to 'configure'.
  [propagated-inputs]: Use 'nettle' instead of 'nettle-2'.  Add 'libidn'.

* gnu/packages/gnutls.scm (gnutls)[outputs]: Add debug output.

* gnu/packages/nettle.scm (nettle)[outputs]: Add debug output.

* doc/guix.texi (Name Service Switch): Add link to nss-mdns.  Add
  example show how to pass #:name-services to 'nscd-service'.
  (Base Services): Add link from 'nscd-service' to the above.
* gnu/services/base.scm (nscd-service): Update docstring accordingly.

* gnu/packages/man.scm (man-pages): Update to 3.82.

* gnu/build/activation.scm (activate-ptrace-attach): New procedure.
* gnu/system.scm (operating-system-activation-script): Use it.

* Makefile.am (MODULES): Add guix/build-system/haskell.scm.

Fixes a regression introduced in 6b1f2388.

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