libreoffice-5.3.5.2 would not build for me with Python-2.7

[Mikhail T.]

I have python=3.6 in my DEFAULT_VERSIONS, but both 2.7 and 3.6 are 
installed.

While trying to build libreoffice, the build attempted to use 2.7 and I 
kept getting the compiler errors like this:

    pyuno_util.cxx:43:18: error: no matching function for call to
    'PyUnicodeUCS2_FromUnicode'

until I changed the USES line in editors/libreoffice/Makefile from 
simply "python" to "python:3".

I don't think, that should be necessary -- simply having "python" there 
should've picked up my desired default version, right? Not sure, if this 
is the problem of libreoffice or python... Yours,

    -mi