Hi,

now I have an emerge mystery myself: It claims boost is blocked by  ... 
nothing. See yourself:
- emerge tells me that boost is for whatever reason blocked
- I cannot find any entry for this in /etc/portage/**
- eix does not show any kind of mask for 1.62.0-r1
- none of the installed packages show a condition preventing an update

Any idea?

Cheers,
Jörg

============= %< ===============
$ emerge -uDvta --changed-use --with-bdeps=y --backtrack=50 world

These are the packages that would be merged, in reverse order:

Calculating dependencies... done!

Total: 0 packages, Size of downloads: 0 KiB

!!! The following update has been skipped due to unsatisfied dependencies:

dev-libs/boost:0

!!! All ebuilds that could satisfy "=dev-util/boost-build-1.62*" have been 
masked.
!!! One of the following masked packages is required to complete your 
request:
- dev-util/boost-build-1.62.0-r1::gentoo (masked by: )

(dependency required by "dev-libs/boost-1.62.0-r1::gentoo" [ebuild])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.



Nothing to merge; quitting.

$ find /etc/portage/ -type f -exec grep boost {} +
/etc/portage/package.use:dev-libs/boost expat
$ eix -I boost
[U] dev-libs/boost
     Available versions:  1.55.0-r2(0/1.55.0)^t 1.56.0-r1(0/1.56.0)^t 
~1.58.0-r1(0/1.58.0)^t ~1.59.0(0/1.59.0)^t ~1.60.0(0/1.60.0)^t 
~1.61.0(0/1.61.0)^t ~1.61.0-r1(0/1.61.0)^t 1.62.0-r1(0/1.62.0)^t 
~1.63.0(0/1.63.0)^t {context debug doc icu mpi +nls python static-libs 
+threads tools ABI_MIPS="n32 n64 o32" ABI_PPC="32 64" ABI_S390="32 64" 
ABI_X86="32 64 x32" PYTHON_TARGETS="python2_7 python3_4 python3_5"}
     Installed versions:  1.56.0-r1^t(11:20:13 AM 12/03/2016)(icu nls 
threads -context -debug -doc -mpi -python -static-libs -tools ABI_MIPS="-n32 
-n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64" ABI_X86="64 -32 -x32" 
PYTHON_TARGETS="python2_7 -python3_4")
     Homepage:            http://www.boost.org/
     Description:         Boost Libraries for C++

[U] dev-util/boost-build
     Available versions:  1.55.0^t ~1.55.0-r1^t 1.56.0^t ~1.58.0^t ~1.59.0^t 
~1.60.0^t ~1.61.0^t 1.62.0-r1^t ~1.63.0^t {examples python test 
PYTHON_TARGETS="python2_7"}
     Installed versions:  1.56.0^t(07:24:23 PM 07/16/2015)(-examples -python 
-test PYTHON_TARGETS="python2_7")
     Homepage:            http://www.boost.org/doc/tools/build/index.html
     Description:         A system for large project software construction, 
simple to use and powerful

Found 2 matches
$ equery d boost
 * These packages depend on boost:
app-office/calligra-2.9.11 (dev-libs/boost)
app-office/kmymoney-4.7.2 (dev-libs/boost)
app-office/libreoffice-5.2.3.3-r1 (>=dev-libs/boost-1.55)
app-text/libabw-0.1.1 (>=dev-libs/boost-1.46)
app-text/libebook-0.1.2-r1 (dev-libs/boost)
app-text/libetonyek-0.1.6 (dev-libs/boost)
app-text/libmspub-0.1.2 (dev-libs/boost)
app-text/libmwaw-0.3.8 (dev-libs/boost)
dev-cpp/libcmis-0.5.2_pre20160820 (dev-libs/boost)
dev-cpp/yaml-cpp-0.5.3 (>=dev-libs/boost-1.49.0-r2)
dev-db/mysql-connector-c++-1.1.6 (dev-libs/boost)
dev-db/mysql-workbench-6.3.4-r1 (>=dev-libs/boost-1.55.0[nls])
dev-db/vsqlite++-0.3.13-r1 (>=dev-libs/boost-1.33.1)
dev-libs/libixion-0.11.1 (dev-libs/boost[threads])
dev-libs/liborcus-0.11.2 (dev-libs/boost)
dev-libs/librevenge-0.0.4 (dev-libs/boost)
dev-util/mdds-1.2.2 (dev-libs/boost)
games-puzzle/pingus-0.7.6 (dev-libs/boost)
games-strategy/0ad-0.0.21_alpha (dev-libs/boost)
games-strategy/wesnoth-1.12.6 (>=dev-libs/boost-1.48[nls,threads])
games-strategy/widelands-0.18 (>=dev-libs/boost-1.48)
games-util/grfcodec-6.0.5 (dev-libs/boost)
kde-apps/akonadi-1.13.1_pre20160203-r1 (dev-libs/boost)
kde-apps/gpgmepp-16.08.3 (dev-libs/boost)
kde-apps/kdepim-runtime-4.14.11_pre20160211 (dev-libs/boost)
kde-apps/kdepimlibs-4.14.11_pre20160211-r2 (>=dev-libs/boost-1.35.0-r5)
kde-apps/kget-16.08.3 (dev-libs/boost)
kde-apps/kleopatra-4.14.11_pre20160211 (dev-libs/boost)
kde-frameworks/kactivities-5.29.0 (>=dev-libs/boost-1.54)
kde-frameworks/kactivities-stats-5.29.0 (>=dev-libs/boost-1.54)
kde-plasma/kactivitymanagerd-5.8.5 (>=dev-libs/boost-1.54)
kde-plasma/plasma-desktop-5.8.5-r1 (dev-libs/boost)
media-gfx/digikam-5.3.0-r1 (dev-libs/boost[threads])
media-gfx/enblend-4.1.3-r1 (>=dev-libs/boost-1.31.0)
media-gfx/hugin-2015.0.0-r1 (>=dev-libs/boost-1.49.0-r1)
media-gfx/inkscape-0.91-r3 (>=dev-libs/boost-1.36)
media-libs/chromaprint-1.2 (test ? dev-libs/boost)
media-libs/libcdr-0.1.1 (dev-libs/boost)
media-libs/libpagemaker-0.0.3-r1 (dev-libs/boost)
media-libs/libvisio-0.1.5 (dev-libs/boost)
media-libs/openimageio-1.6.13 (dev-libs/boost[python?])
media-libs/vigra-1.9.0 (>=dev-libs/boost-1.52.0-
r6[python?,python_targets_python2_7(-)?,-python_single_target_jython2_7(-),-
python_single_target_pypy(-),-python_single_target_pypy3(-),-
python_single_target_python3_4(-),-python_single_target_python3_5(-),-
python_single_target_python3_6(-),python_single_target_python2_7(+)])
media-video/cclive-0.9.3-r1 (>=dev-libs/boost-1.49)
sys-block/thin-provisioning-tools-0.4.1 (dev-libs/boost)
============= %< ===============



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