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"""Helpers to check build environment before actual build of scikit-learn"""
import glob
import os
import subprocess
import sys
import tempfile
import textwrap
from setuptools.command.build_ext import customize_compiler, new_compiler
def compile_test_program(code, extra_preargs=None, extra_postargs=None):
"""Check that some C code can be compiled and run"""
ccompiler = new_compiler()
customize_compiler(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
def basic_check_build():
"""Check basic compilation and linking of C code"""
if "PYODIDE_PACKAGE_ABI" in os.environ:
# The following check won't work in pyodide
return
code = textwrap.dedent("""\
#include <stdio.h>
int main(void) {
return 0;
}
""")
compile_test_program(code)
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