Xavier de Gaye added the comment:
> But I am a bit worried at the new makefile syntax [ifeq directive and
> $(findstring) function]. I suspect it is Gnu specific, and that Python tries
> to support other versions of Make as well.
Yes, they are both GNU extensions :(
To avoid modifying configure.ac since the information is already available, the
recipes could be modified with the following conditional:
cross_compiling=$$(echo $(PYTHON_FOR_BUILD) | sed
"s/.*_PYTHON_HOST_PLATFORM.*/yes/"); \
if [ "$$cross_compiling" = "yes" ]; then \
touch $@;
else \
# The original recipes.
fi
So the built binaries $(PGEN) and Programs/_freeze_importlib would be dummy
empty files, but that would not prevent Programs/_freeze_importlib.o,
$(LIBRARY_OBJS_OMIT_FROZEN) and $(PGENOBJS) to be needlessly cross-compiled.
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<http://bugs.python.org/issue22359>
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