# -*- coding: utf-8 -*-
# Copyright (C) 2018 Chris N Richardson
#
# This file is part of DOLFIN (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 **dolfin.pc** pkg-config file, needed for JIT compilation.
"""
import subprocess
import os
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'))
[docs]def exists(package):
"Test for the existence of a pkg-config file for a named package"
return (_pkgconfig_query("--exists " + package)[0] == 0)
[docs]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[token[1]]
t = token[2:].strip()
result[key].append(t)
return result