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"""Helpers to check build environment before actual build of POT"""
import os
import sys
import glob
import tempfile
import setuptools # noqa
import subprocess
from distutils.dist import Distribution
from distutils.sysconfig import customize_compiler
from numpy.distutils.ccompiler import new_compiler
from numpy.distutils.command.config_compiler import config_cc
def _get_compiler():
"""Get a compiler equivalent to the one that will be used to build POT
Handles compiler specified as follows:
- python setup.py build_ext --compiler=<compiler>
- CC=<compiler> python setup.py build_ext
"""
dist = Distribution({'script_name': os.path.basename(sys.argv[0]),
'script_args': sys.argv[1:],
'cmdclass': {'config_cc': config_cc}})
cmd_opts = dist.command_options.get('build_ext')
if cmd_opts is not None and 'compiler' in cmd_opts:
compiler = cmd_opts['compiler'][1]
else:
compiler = None
ccompiler = new_compiler(compiler=compiler)
customize_compiler(ccompiler)
return ccompiler
def compile_test_program(code, extra_preargs=[], extra_postargs=[]):
"""Check that some C code can be compiled and run"""
ccompiler = _get_compiler()
# extra_(pre/post)args can be a callable to make it possible to get its
# value from the compiler
if callable(extra_preargs):
extra_preargs = extra_preargs(ccompiler)
if callable(extra_postargs):
extra_postargs = extra_postargs(ccompiler)
start_dir = os.path.abspath('.')
with tempfile.TemporaryDirectory() as tmp_dir:
try:
os.chdir(tmp_dir)
# Write test program
with open('test_program.c', 'w') as f:
f.write(code)
os.mkdir('objects')
# Compile, test program
ccompiler.compile(['test_program.c'], output_dir='objects',
extra_postargs=extra_postargs)
# Link test program
objects = glob.glob(
os.path.join('objects', '*' + ccompiler.obj_extension))
ccompiler.link_executable(objects, 'test_program',
extra_preargs=extra_preargs,
extra_postargs=extra_postargs)
if "PYTHON_CROSSENV" not in os.environ:
# Run test program if not cross compiling
# will raise a CalledProcessError if return code was non-zero
output = subprocess.check_output('./test_program')
output = output.decode(
sys.stdout.encoding or 'utf-8').splitlines()
else:
# Return an empty output if we are cross compiling
# as we cannot run the test_program
output = []
except Exception:
raise
finally:
os.chdir(start_dir)
return output, extra_postargs
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