def pkgconfig(*packages, **kw):
"""
Query pkg-config for library compile and linking options. Return configuration in distutils
Extension format.
Usage:
pkgconfig('opencv')
pkgconfig('opencv', 'libavformat')
pkgconfig('opencv', optional='--static')
pkgconfig('opencv', config=c)
returns e.g.
{'extra_compile_args': [],
'extra_link_args': [],
'include_dirs': ['/usr/include/ffmpeg'],
'libraries': ['avformat'],
'library_dirs': []}
Intended use:
distutils.core.Extension('pyextension', sources=['source.cpp'], **c)
Set PKG_CONFIG_PATH environment variable for nonstandard library locations.
based on work of Micah Dowty (http://code.activestate.com/recipes/502261-python-distutils-pkg-config/)
"""
config = kw.setdefault('config', {})
optional_args = kw.setdefault('optional', '')
# { <distutils Extension arg>: [<pkg config option>, <prefix length to strip>], ...}
flag_map = {'include_dirs': ['--cflags-only-I', 2],
'library_dirs': ['--libs-only-L', 2],
'libraries': ['--libs-only-l', 2],
'extra_compile_args': ['--cflags-only-other', 0],
'extra_link_args': ['--libs-only-other', 0],
}
for package in packages:
for distutils_key, (pkg_option, n) in flag_map.items():
items = subprocess.check_output(['pkg-config', optional_args, pkg_option, package]).decode('utf8').split()
config.setdefault(distutils_key, []).extend([i[n:] for i in items])
return config
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