yade build problem on i386, powerpc and sparc platforms

[Anton Gladky <gladky.anton@gmail.com>]

Hi, all

recently my package yade has been accepted into the experimental
branch and built on amd64-platform.

But it seems there are some problems with other 3 platforms:  i386,
powerpc and sparc.
https://buildd.debian.org/build.cgi?pkg=yade

For example, for i386 platform there is the following problem:

----------------------------------
The following packages have unmet dependencies:
  sbuild-build-depends-yade-dummy: Depends: liblog4cxx9-dev which is a
virtual package.
                                   Depends: python-sphinx (>= 0.99)
but it is not going to be installed.
----------------------------------

Why it happens, that it builds on amd64 and does not build on others?

Thanks.

Anton