pyo3/emscripten/Makefile
Hood Chatham da5b9814cc
Set up CI for wasm32-emscripten target (#2436)
* ci: test on emscripten target

This adds CI to build libpython3.11 for wasm32-emscripten and
running tests against it. We need to patch instant to work
around the emscripten_get_now:
https://github.com/sebcrozet/instant/pull/47

We also have to patch emscripten to work aroung the "undefined
symbol gxx_personality_v0" error:
https://github.com/emscripten-core/emscripten/issues/17128

I set up a nox file to download and install emscripten,
download and build cpython, set appropriate environment variables
then run cargo test. The workflow just installs python, rust,
node, and nox and runs the nox session.

I xfailed all the test failures. There are problems with datetime.
iter_dict_nosegv and test_filenotfounderror should probably be
fixable. The tests that involve threads or asyncio probably can't
be fixed.

* Some cleanup

* Remove instant patch

* Add explanations for xfails
2022-06-08 05:59:18 +01:00

89 lines
2.8 KiB
Makefile

CURDIR=$(abspath .)
# These three are passed in from nox.
BUILDROOT ?= $(CURDIR)/builddir
PYMAJORMINORMICRO ?= 3.11.0
PYPRERELEASE ?= b1 # I'm not sure how to split 3.11.0b1 in Make.
EMSCRIPTEN_VERSION=3.1.13
export EMSDKDIR = $(BUILDROOT)/emsdk
PLATFORM=wasm32_emscripten
SYSCONFIGDATA_NAME=_sysconfigdata__$(PLATFORM)
# BASH_ENV tells bash to source emsdk_env.sh on startup.
export BASH_ENV := $(CURDIR)/env.sh
# Use bash to run each command so that env.sh will be used.
SHELL := /bin/bash
# Set version variables.
version_tuple := $(subst ., ,$(PYMAJORMINORMICRO:v%=%))
PYMAJOR=$(word 1,$(version_tuple))
PYMINOR=$(word 2,$(version_tuple))
PYMICRO=$(word 3,$(version_tuple))
PYVERSION=$(PYMAJORMINORMICRO)$(PYPRERELEASE)
PYMAJORMINOR=$(PYMAJOR).$(PYMINOR)
PYTHONURL=https://www.python.org/ftp/python/$(PYMAJORMINORMICRO)/Python-$(PYVERSION).tgz
PYTHONTARBALL=$(BUILDROOT)/downloads/Python-$(PYVERSION).tgz
PYTHONBUILD=$(BUILDROOT)/build/Python-$(PYVERSION)
PYTHONLIBDIR=$(BUILDROOT)/install/Python-$(PYVERSION)/lib
all: $(PYTHONLIBDIR)/libpython$(PYMAJORMINOR).a
$(BUILDROOT)/.exists:
mkdir -p $(BUILDROOT)
touch $@
# Install emscripten
$(EMSDKDIR): $(CURDIR)/emscripten_patches/* $(BUILDROOT)/.exists
git clone https://github.com/emscripten-core/emsdk.git --depth 1 --branch $(EMSCRIPTEN_VERSION) $(EMSDKDIR)
$(EMSDKDIR)/emsdk install $(EMSCRIPTEN_VERSION)
cd $(EMSDKDIR)/upstream/emscripten && cat $(CURDIR)/emscripten_patches/* | patch -p1
$(EMSDKDIR)/emsdk activate $(EMSCRIPTEN_VERSION)
$(PYTHONTARBALL):
[ -d $(BUILDROOT)/downloads ] || mkdir -p $(BUILDROOT)/downloads
wget -q -O $@ $(PYTHONURL)
$(PYTHONBUILD)/.patched: $(PYTHONTARBALL)
[ -d $(PYTHONBUILD) ] || ( \
mkdir -p $(dir $(PYTHONBUILD));\
tar -C $(dir $(PYTHONBUILD)) -xf $(PYTHONTARBALL) \
)
touch $@
$(PYTHONBUILD)/Makefile: $(PYTHONBUILD)/.patched $(BUILDROOT)/emsdk
cd $(PYTHONBUILD) && \
CONFIG_SITE=Tools/wasm/config.site-wasm32-emscripten \
emconfigure ./configure -C \
--host=wasm32-unknown-emscripten \
--build=$(shell $(PYTHONBUILD)/config.guess) \
--with-emscripten-target=browser \
--enable-wasm-dynamic-linking \
--with-build-python=python3.11
$(PYTHONLIBDIR)/libpython$(PYMAJORMINOR).a : $(PYTHONBUILD)/Makefile
cd $(PYTHONBUILD) && \
emmake make -j3 libpython$(PYMAJORMINOR).a
# Generate sysconfigdata
_PYTHON_SYSCONFIGDATA_NAME=$(SYSCONFIGDATA_NAME) _PYTHON_PROJECT_BASE=$(PYTHONBUILD) python3.11 -m sysconfig --generate-posix-vars
cp `cat pybuilddir.txt`/$(SYSCONFIGDATA_NAME).py $(PYTHONBUILD)/Lib
mkdir -p $(PYTHONLIBDIR)
# Copy libexpat.a, libmpdec.a, and libpython3.11.a
# In noxfile, we explicitly link libexpat and libmpdec via RUSTFLAGS
find $(PYTHONBUILD) -name '*.a' -exec cp {} $(PYTHONLIBDIR) \;
# Install Python stdlib
cp -r $(PYTHONBUILD)/Lib $(PYTHONLIBDIR)/python$(PYMAJORMINOR)
clean:
rm -rf $(BUILDROOT)