cross-build-notes.txt

# Notes on cross-compiling Python 3.6.0 pre releases
# Work in progress

# Build a native interpreter in tree, for use as PYTHON_FOR_BUILD later.
# You _might_ be able to avoid this by using a pre-installed python,
# but if e.g. /usr/bin/python is 3.5.x, then you'll get syntax errors when it
# tries import 3.6.x stdlib modules.
configure
make python

# Cross build a foreign interpreter out of tree
# The PYTHON_FOR_BUILD line is taken verbatim from configure.ac
# --assume-new because (currently) the Makefile incorrectly believes
# it's a preqrequisite of graminit.h
mkdir cross
cd cross
../configure --build=x86_64-linux \
             --host=arm-linux-gnueabihf \
             --disable-ipv6 \
             ac_cv_file__dev_ptc=no \
             ac_cv_file__dev_ptmx=no \
             PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib:$(srcdir)/Lib/$(PLATDIR) '../python
make --assume-new Parser/pgen