[Kolab-devel] libkolabxml git master does not build due to boost error

Hello,
I noticed that the nightly build of the kolab packages from git master
broke last week, while I was away on holiday.

Due to another error in kolab-webadmin which was minor (%doc doc/*
INSTALL LICENSE did not find INSTALL and LICENSE) I cannot say which
day it broke.

The problem with libkolabxml is this error message:
[ 12%] Building CXX object src/CMakeFiles/kolabxml.dir/objectvalidation.cpp.o
cd /home/buildkolab/rpmbuild/BUILD/libkolabxml-master/build/src &&
/usr/bin/c++   -Dkolabxml_EXPORTS -O2 -g  -Wall -fPIC
-Wp,-D_FORTIFY_SOURCE=2 -O2 -fPIC
-I/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/.
-I/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/compiled
-I/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/src/containers
-I/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/build   -Wall
-Wextra -Wconversion -o CMakeFiles/kolabxml.dir/objectvalidation.cpp.o
-c /home/buildkolab/rpmbuild/BUILD/libkolabxml-master/src/objectvalidation.cpp
/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/src/objectvalidation.cpp:32:
error: 'boost::unordered' has not been declared
/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/src/objectvalidation.cpp:32:
error: expected initializer before '<' token
/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/src/objectvalidation.cpp:141:
error: expected '}' at end of input
make[2]: *** [src/CMakeFiles/kolabxml.dir/objectvalidation.cpp.o] Error 1
make[2]: Leaving directory
`/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/build'
make[1]: *** [src/CMakeFiles/kolabxml.dir/all] Error 2
make[1]: Leaving directory
`/home/buildkolab/rpmbuild/BUILD/libkolabxml-master/build'
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.EaAGn7 (%build)

I tried already to install a newer version of Boost, which solved that
issue, but got me into other trouble, probably because I did not
install boost 1.50 cleanly?

The question is: what is the recommended way to build libkolabxml from
git master? which configuration of Boost is required?

Thanks,
  Timotheus