Function pkg_config

configure.py:1298–1323

Run pkg-config on the specified package Returns ("-l flags", "-I flags", "-L flags", "version") otherwise (None, None, None, None)

(pkg)

  return s if isinstance(s, str) else s.decode("utf-8")

def pkg_config(pkg):
  """Run pkg-config on the specified package
  Returns ("-l flags", "-I flags", "-L flags", "version")
  otherwise (None, None, None, None)"""
  pkg_config = os.environ.get('PKG_CONFIG', 'pkg-config')
  args = []  # Print pkg-config warnings on first round.
  retval = []
  for flag in ['--libs-only-l', '--cflags-only-I',
               '--libs-only-L', '--modversion']:
    args += [flag]
    if isinstance(pkg, list):
      args += pkg
    else:
      args += [pkg]
    try:
      proc = subprocess.Popen(shlex.split(pkg_config) + args,
                              stdout=subprocess.PIPE)
      with proc:
        val = to_utf8(proc.communicate()[0]).strip()
    except OSError as e:
      if e.errno != errno.ENOENT:
        raise e  # Unexpected error.
      return (None, None, None, None)  # No pkg-config/pkgconf installed.
    retval.append(val)
    args = ['--silence-errors']
  return tuple(retval)


def try_check_compiler(cc, lang):