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# Copyright (C) 2018 Chris N Richardson
#
# This file is part of DOLFINx (https://www.fenicsproject.org)
#
# SPDX-License-Identifier: LGPL-3.0-or-later
"""Tool for querying pkg-config files.
This module exists solely to extract the compilation and linking
information saved in the **dolfinx.pc** pkg-config file, needed for JIT
compilation.
"""
import os
import subprocess
def _pkgconfig_query(s):
pkg_config_exe = os.environ.get("PKG_CONFIG", None) or "pkg-config"
cmd = [pkg_config_exe, *s.split()]
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, _err = proc.communicate()
rc = proc.returncode
return (rc, out.rstrip().decode("utf-8"))
def exists(package) -> bool:
"""Test for the existence of a pkg-config file for a named package."""
return _pkgconfig_query("--exists " + package)[0] == 0
def parse(package):
"""Return a dict containing compile-time definitions."""
parse_map = {
"-D": "define_macros",
"-I": "include_dirs",
"-L": "library_dirs",
"-l": "libraries",
}
result = {x: [] for x in parse_map.values()}
# Execute the query to pkg-config and clean the result
out = _pkgconfig_query(package + " --cflags --libs")[1]
out = out.replace('\\"', "")
# Iterate through each token in the output
for token in out.split():
key = parse_map.get(token[:2])
if key:
t = token[2:].strip()
result[key].append(t)
return result
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