* gnu/packages/patches/boost-dumpversion.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/boost.scm (boost)[source]: Apply it,
[native-inputs]: add python unless cross-compiling,
[arguments]: pass cross-compilation mandatory
flags and fill a user-config.jam file pointing to cross-compiler. Disable
python support that is broken when cross-compiling. Disable
provide-libboost_python when cross-compiling.
Mathieu Othacehe