python_version := 3.7.0
python_tarball := Python-$(python_version).tar.xz
python_tarball_path := src/$(python_tarball)
build_dir := build/$(arch)
python_dir := $(build_dir)/Python-$(python_version)
prefix := $(arch)-linux-musl-
prefix_dir := build/$(arch)/target
bin_unstripped := $(prefix_dir)/bin/python3.7_unstripped
bin := $(prefix_dir)/bin/python3.7


ifeq ($(arch), mipsel)
	prefix := mipsel-linux-musln32-
endif

cc := $(prefix)gcc
strip := $(prefix)strip

$(python_tarball_path):
	wget https://www.python.org/ftp/python/$(python_version)/$(python_tarball) -O $(python_tarball_path)

$(python_dir): $(python_tarball_path)
	mkdir -p $(build_dir)
	cd $(build_dir) && tar xvf ../../$(python_tarball_path)

$(bin): $(python_dir)
	cd $(python_dir) && ./configure \
		CC=$(cc) \
		--host=$(arch)-linux-musl \
		--target=$(arch)-linux-musl \
		--build=x86_64-linux-gnu \
		--disable-ipv6 \
		--without-ensurepip \
		ac_cv_file__dev_ptmx=no \
		ac_cv_file__dev_ptc=no \
		ac_cv_have_long_long_format=yes \
		--prefix=`realpath ../target`

	cd $(python_dir) && make -j8 build_all
	mkdir -p $(prefix_dir)
	cd $(python_dir) && make -j8 altinstall

.PHONY: all clean

all: $(bin)

clean:
	rm -rf build/$(arch)