gnu: r-hms: Update to 0.4.0.
* gnu/packages/statistics.scm (r-hms): Update to 0.4.0.
[propagated-inputs]: Add r-rlang and r-pkgconfig.
gnu: r-dendextend: Update to 1.6.0.
* gnu/packages/cran.scm (r-dendextend): Update to 1.6.0.
gnu: r-recipes: Update to 0.1.1.
* gnu/packages/cran.scm (r-recipes): Update to 0.1.1.
[propagated-inputs]: Add r-broom and r-matrix.
gnu: Add r-broom.
* gnu/packages/cran.scm (r-broom): New variable.
gnu: Add r-psych.
* gnu/packages/cran.scm (r-psych): New variable.
gnu: mongodb: Use scons-build-system.
* gnu/packages/databases.scm (mongodb): Switch to scons-build-system.
gnu: klick: Use scons-build-system.
* gnu/packages/music.scm (klick): Switch to scons-build-system.
gnu: pingus: Use scons-build-system.
* gnu/packages/games.scm (pingus): Switch to scons-build-system.
gnu: godot: Use scons-build-system.
* gnu/packages/game-development.scm (godot): Switch to scons-build-system.
gnu: metabat: Use scons-build-system.
* gnu/packages/bioinformatics.scm (metabat): Switch to scons-build-system.
gnu: serf: Use scons-build-system.
* gnu/packages/web.scm (serf): Switch to scons-build-system.
gnu: gpick: Use scons-build-system.
* gnu/packages/image.scm (gpick): Switch to scons-build-system.
gnu: linuxdcpp: Use scons-build-system.
* gnu/packages/direct-connect.scm (linuxdcpp): Switch to scons-build-system.
build-system: Add scons-build-system.
* guix/build-system/scons.scm: New file.
* guix/build/scons-build-system.scm: New file.
* Makefile.am (MODULES): Register them.
* doc/guix.texi (Build Systems): Add scons-build-system.
gnu: scons: Update to 3.0.1.
* gnu/packages/python.scm (scons): Update to 3.0.1.
(scons-python2): New variable.
gnu: dtc: Fix build on 32 bits platforms.
* gnu/packages/bootloaders.scm (dtc)[patches]: Add dtc-32-bits-check.patch and
dtc-format-modifier.patch to fix build and tests on 32 bits platforms.
* gnu/packages/patches/dtc-32-bits-check.patch : New file.
* gnu/packages/patches/dtc-format-modifier.patch : New file.
* gnu/local.mk (dist_patch_DATA): Add two above patches.
gnu: Update r-matrix to 1.2-12.
* gnu/packages/statistics.scm (r-matrix): Update to 1.2-12.
gnu: Update r-cluster to 2.0.6.
* gnu/packages/statistics.scm (r-cluster): Update to 2.0.6.
gnu: Update r-minimal to 3.4.3.
* gnu/packages/statistics.scm (r-minimal): Update to 3.4.3.